|
casacore
|
All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
|
casacore
|
Interconvert pixel and world coordinates. More...
#include <CoordinateSystem.h>
Public Member Functions | |
| CoordinateSystem () | |
| Default constructor. More... | |
| CoordinateSystem (const CoordinateSystem &other) | |
| Copying constructor (copy semantics) More... | |
| CoordinateSystem & | operator= (const CoordinateSystem &other) |
| Assignment (copy semantics). More... | |
| virtual | ~CoordinateSystem () |
| Destructor. More... | |
| void | addCoordinate (const Coordinate &coord) |
| Add another Coordinate to this CoordinateSystem. More... | |
| void | transpose (const Vector< Int > &newWorldOrder, const Vector< Int > &newPixelOrder) |
| Transpose the CoordinateSystem so that world axis 0 is newWorldOrder(0) and so on for all the other axes. More... | |
| Bool | worldMap (Vector< Int > &worldAxisMap, Vector< Int > &worldAxisTranspose, Vector< Bool > &refChange, const CoordinateSystem &cSys) const |
| Find the world and pixel axis mappings to the supplied CoordinateSystem from the current coordinate system. More... | |
| Bool | pixelMap (Vector< Int > &pixelAxisMap, Vector< Int > &pixelAxisTranspose, const CoordinateSystem &cSys) const |
| Bool | removeWorldAxis (uInt axis, Double replacement) |
| Remove a world or pixel axis. More... | |
| Bool | removePixelAxis (uInt axis, Double replacement) |
| CoordinateSystem | subImage (const Vector< Float > &originShift, const Vector< Float > &incrFac, const Vector< Int > &newShape) const |
| Return a CoordinateSystem appropriate for a shift of origin (the shift is subtracted from the reference pixel) and change of increment (the increments are multipled by the factor). More... | |
| void | subImageInSitu (const Vector< Float > &originShift, const Vector< Float > &incrFac, const Vector< Int > &newShape) |
| void | restoreOriginal () |
| Untranspose and undelete all axes. More... | |
| uInt | nCoordinates () const |
| Returns the number of Coordinates that this CoordinateSystem contains. More... | |
| Vector< Int > | worldAxes (uInt whichCoord) const |
| For a given Coordinate say where its world and pixel axes are in this CoordinateSystem. More... | |
| Vector< Int > | pixelAxes (uInt whichCoord) const |
| Coordinate::Type | type (uInt whichCoordinate) const |
| Return the type of the given Coordinate. More... | |
| String | showType (uInt whichCoordinate) const |
| Returns the type of the given Coordinate as a string. More... | |
| const Coordinate & | coordinate (uInt which) const |
| Return the given Coordinate as a reference to the base class object. More... | |
| const LinearCoordinate & | linearCoordinate (uInt which) const |
| Return the given Coordinate. More... | |
| const DirectionCoordinate & | directionCoordinate () const |
| const DirectionCoordinate & | directionCoordinate (uInt which) const |
| const SpectralCoordinate & | spectralCoordinate (uInt which) const |
| const SpectralCoordinate & | spectralCoordinate () const |
| const StokesCoordinate & | stokesCoordinate () const |
| const StokesCoordinate & | stokesCoordinate (uInt which) const |
| const QualityCoordinate & | qualityCoordinate (uInt which) const |
| const TabularCoordinate & | tabularCoordinate (uInt which) const |
| Bool | replaceCoordinate (const Coordinate &newCoordinate, uInt whichCoordinate) |
| Replace one Coordinate with another. More... | |
| Int | findCoordinate (Coordinate::Type type, Int afterCoord=-1) const |
| Find the Coordinate number that corresponds to the given type. More... | |
| void | findWorldAxis (Int &coordinate, Int &axisInCoordinate, uInt axisInCoordinateSystem) const |
| Given an axis number (pixel or world) in the CoordinateSystem, find the corresponding coordinate number and axis in that Coordinate. More... | |
| void | findPixelAxis (Int &coordinate, Int &axisInCoordinate, uInt axisInCoordinateSystem) const |
| Int | pixelAxisToWorldAxis (uInt pixelAxis) const |
| Find the world axis for the given pixel axis in a CoordinateSystem. More... | |
| Int | worldAxisToPixelAxis (uInt worldAxis) const |
| Find the pixel axis for the given world axis in a CoordinateSystem. More... | |
| String | coordRecordName (uInt which) const |
| Return the name of the record field in which the coordinate is stored. More... | |
| virtual Coordinate::Type | type () const |
Returns Coordinate::COORDSYS More... | |
| virtual String | showType () const |
| Always returns "System". More... | |
| virtual uInt | nPixelAxes () const |
| Sums the number of axes in the Coordinates that the CoordinateSystem contains, allowing for removed axes. More... | |
| virtual uInt | nWorldAxes () const |
| virtual Bool | toWorld (Vector< Double > &world, const Vector< Double > &pixel, Bool useConversionFrame=True) const |
| Convert a pixel position to a world position or vice versa. More... | |
| virtual Vector< Double > | toWorld (const Vector< Double > &pixel) const |
| This one throws an exception rather than returning False. More... | |
| virtual Bool | toPixel (Vector< Double > &pixel, const Vector< Double > &world) const |
| virtual Vector< Double > | toPixel (const Vector< Double > &world) const |
| This one throws an exception rather than returning False. More... | |
| virtual Quantity | toWorldLength (const Double nPixels, const uInt pixelAxis) const |
| convert a pixel "length" to a world "length" More... | |
| Bool | toWorld (Vector< Double > &world, const IPosition &pixel) const |
| This is provided as a convenience since it is a very commonly desired operation through CoordinateSystem. More... | |
| Vector< Double > | toWorld (const IPosition &pixel) const |
| virtual Bool | toWorldMany (Matrix< Double > &world, const Matrix< Double > &pixel, Vector< Bool > &failures) const |
| Batch up a lot of transformations. More... | |
| virtual Bool | toPixelMany (Matrix< Double > &pixel, const Matrix< Double > &world, Vector< Bool > &failures) const |
| virtual Bool | toMix (Vector< Double > &worldOut, Vector< Double > &pixelOut, const Vector< Double > &worldIn, const Vector< Double > &pixelIn, const Vector< Bool > &worldAxes, const Vector< Bool > &pixelAxes, const Vector< Double > &worldMin, const Vector< Double > &worldMax) const |
| Mixed pixel/world coordinate conversion. More... | |
| virtual Bool | setWorldMixRanges (const IPosition &shape) |
Compute and recover the world min and max ranges, for use in function toMix, for a lattice of the given shape (must be of length nPixelAxes()). More... | |
| virtual void | setDefaultWorldMixRanges () |
| virtual Vector< Double > | worldMixMin () const |
| virtual Vector< Double > | worldMixMax () const |
| virtual void | makePixelRelative (Vector< Double > &pixel) const |
| Make absolute coordinates relative and vice-versa (relative to the reference pixel/value). More... | |
| virtual void | makePixelAbsolute (Vector< Double > &pixel) const |
| virtual void | makeWorldRelative (Vector< Double > &world) const |
| virtual void | makeWorldAbsolute (Vector< Double > &world) const |
| virtual void | makeWorldAbsoluteRef (Vector< Double > &world, const Vector< Double > &refVal) const |
| Make absolute coordinates relative and vice versa with respect to the given reference value. More... | |
| virtual void | makePixelRelativeMany (Matrix< Double > &pixel) const |
| Batch up a lot of absolute/relative transformations. More... | |
| virtual void | makePixelAbsoluteMany (Matrix< Double > &pixel) const |
| virtual void | makeWorldRelativeMany (Matrix< Double > &world) const |
| virtual void | makeWorldAbsoluteMany (Matrix< Double > &world) const |
| Bool | convert (Vector< Double > &coordOut, const Vector< Double > &coordin, const Vector< Bool > &absIn, const Vector< String > &unitsIn, MDoppler::Types dopplerIn, const Vector< Bool > &absOut, const Vector< String > &unitsOut, MDoppler::Types dopplerOut, Double pixInOffset=0.0, Double pixOutOffset=0.0) |
| General coordinate conversion. More... | |
| Bool | convert (Matrix< Double > &coordOut, const Matrix< Double > &coordIn, const Vector< Bool > &absIn, const Vector< String > &unitsIn, MDoppler::Types dopplerIn, const Vector< Bool > &absOut, const Vector< String > &unitsOut, MDoppler::Types dopplerOut, Double pixInOffset=0.0, Double pixOutOffset=0.0) |
| virtual Vector< String > | worldAxisNames () const |
| Return the requested attribute. More... | |
| virtual Vector< Double > | referencePixel () const |
| virtual Matrix< Double > | linearTransform () const |
| virtual Vector< Double > | increment () const |
| virtual Vector< Double > | referenceValue () const |
| virtual Bool | setWorldAxisNames (const Vector< String > &names) |
| Set the requested attribute. More... | |
| virtual Bool | setReferencePixel (const Vector< Double > &refPix) |
| virtual Bool | setLinearTransform (const Matrix< Double > &xform) |
| virtual Bool | setIncrement (const Vector< Double > &inc) |
| virtual Bool | setReferenceValue (const Vector< Double > &refval) |
| virtual Bool | setWorldAxisUnits (const Vector< String > &units) |
| Set/get the units. More... | |
| Bool | setWorldAxisUnits (const Vector< String > &units, Bool throwException) |
| virtual Vector< String > | worldAxisUnits () const |
| virtual Bool | near (const Coordinate &other, Double tol=1e-6) const |
| Comparison function. More... | |
| virtual Bool | near (const Coordinate &other, const Vector< Int > &excludePixelAxes, Double tol=1e-6) const |
| Bool | nearPixel (const CoordinateSystem &other, Double tol=1e-6) const |
| This function compares this and the other coordinate system, but ONLY for the non-removed pixel axes. More... | |
| virtual String | format (String &units, Coordinate::formatType format, Double worldValue, uInt worldAxis, Bool isAbsolute=True, Bool showAsAbsolute=True, Int precision=-1, Bool usePrecForMixed=False) const |
| Format a world value nicely through the common format interface. More... | |
| ObsInfo | obsInfo () const |
| Miscellaneous information related to an observation, for example the observation date. More... | |
| void | setObsInfo (const ObsInfo &obsinfo) |
| virtual Coordinate * | makeFourierCoordinate (const Vector< Bool > &axes, const Vector< Int > &shape) const |
| Find the CoordinateSystem (you can safely caste the pointer to a CoordinateSystem) for when we Fourier Transform ourselves. More... | |
| virtual Bool | save (RecordInterface &container, const String &fieldName) const |
| Save the CoordinateSystem into the supplied record using the supplied field name. More... | |
| virtual Coordinate * | clone () const |
| Make a copy of the CoordinateSystem using new. More... | |
| Bool | toFITSHeader (RecordInterface &header, IPosition &shape, Bool oneRelative, Char prefix= 'c', Bool writeWCS=True, Bool preferVelocity=True, Bool opticalVelocity=True, Bool preferWavelength=False, Bool airWavelength=False) const |
| Convert a CoordinateSystem to FITS, i.e. More... | |
| Vector< String > | list (LogIO &os, MDoppler::Types doppler, const IPosition &latticeShape, const IPosition &tileShape, Bool postLocally=False) const |
| List all header information. More... | |
| Bool | hasSpectralAxis () const |
| Does this coordinate system have a spectral axis? More... | |
| Int | spectralAxisNumber (Bool doWorld=False) const |
| What number is the spectral axis? If doWorld=True, the world axis number is returned. More... | |
| Int | spectralCoordinateNumber () const |
| what number is the spectral coordinate? Returns -1 if no spectral coordinate exists. More... | |
| Bool | hasPolarizationCoordinate () const |
| does this coordinate system have a polarizaion/stokes coordinate? More... | |
| Bool | hasPolarizationAxis () const |
| Int | stokesPixelNumber (const String &stokesString) const |
| Given a stokes or polarization parameter, find the pixel location. More... | |
| Int | polarizationCoordinateNumber () const |
| what is the number of the polarization/stokes coordinate? Returns -1 if no stokes coordinate exists. More... | |
| Int | polarizationAxisNumber (Bool doWorld=False) const |
| What is the number of the polarization/stokes axis? If doWorld=True, the world axis number is returned. More... | |
| Bool | hasQualityAxis () const |
| Does this coordinate system have a quality axis? More... | |
| Int | qualityAxisNumber () const |
| what number is the quality axis? Returns -1 if no quality axis exists. More... | |
| Int | qualityCoordinateNumber () const |
| what is the number of the quality coordinate? Returns -1 if no quality coordinate exists. More... | |
| Int | qualityPixelNumber (const String &qualityString) const |
| Given a quality parameter, find the pixel location. More... | |
| String | qualityAtPixel (const uInt pixel) const |
| Int | directionCoordinateNumber () const |
| Bool | hasDirectionCoordinate () const |
| Vector< Int > | directionAxesNumbers () const |
| Get the pixel axis numbers of the direction coordinate in this object. More... | |
| String | stokesAtPixel (const uInt pixel) const |
| Int | linearCoordinateNumber () const |
| Bool | hasLinearCoordinate () const |
| Vector< Int > | linearAxesNumbers () const |
| Vector< Int > | getWorldAxesOrder (Vector< String > &myNames, Bool requireAll, Bool allowFriendlyNames=False) const |
Get the 0 based order of the minimal match strings specified in order. More... | |
| Bool | isDirectionAbscissaLongitude () const |
| Is the abscissa in the DirectionCoordinate the longitude axis? Throws exception if there is no DirectionCoordinate or if either of the direction pixel axes have been removed. More... | |
| Bool | setSpectralConversion (String &errorMsg, const String frequencySystem) |
| Set Spectral conversion layer of SpectralCoordinate in CoordinateSystem so that pixel<->world go to the specified frequency system (a valid MFrequency::Types string). More... | |
| void | setSpectralConversion (const String frequencySystem) |
| This version throws an exception rather than returning False. More... | |
| Bool | setRestFrequency (String &errorMsg, const Quantity &freq) |
| Set rest frequency of SpectralCoordinate in CoordinateSystem. More... | |
 Public Member Functions inherited from casacore::Coordinate | |
| virtual | ~Coordinate () |
| Destructor. More... | |
| Vector< Double > | worldMixMin () const |
| Vector< Double > | worldMixMax () const |
| const String & | errorMessage () const |
| If the last conversion to world or pixel coordinates resulted in an error, report that error. More... | |
| virtual void | getPrecision (Int &precision, Coordinate::formatType &format, Bool showAsAbsolute, Int defPrecScientific, Int defPrecFixed, Int defPrecTime) const |
| Provide a common interface to getting formatted representations of coordinate values. More... | |
| String | formatQuantity (String &units, Coordinate::formatType format, const Quantum< Double > &worldValue, uInt axis, Bool isAbsolute=True, Bool showAsAbsolute=True, Int precision=-1) |
| virtual Bool | doNearPixel (const Coordinate &other, const Vector< Bool > &thisAxes, const Vector< Bool > &otherAxes, Double tol=1.0e-6) const |
| Comparison only made for specified axes in this and other Coordinate The default implementation should be ok for all Coordinate types except Stokes and Quality... More... | |
| virtual Coordinate * | rotate (const Quantum< Double > &angle) const |
| return the result of rotating the coordinate clockwise through the specified angle. More... | |
Static Public Member Functions | |
| static CoordinateSystem * | restore (const RecordInterface &container, const String &fieldName) |
| Restore the CoordinateSystem from a record. More... | |
| static Bool | fromFITSHeader (Int &stokesFITSValue, CoordinateSystem &coordsys, RecordInterface &recHeader, const Vector< String > &header, const IPosition &shape, uInt which=0) |
| Probably even if we return False we should set up the best linear coordinate that we can. More... | |
| Static Public Member Functions inherited from casacore::Coordinate | |
| static String | typeToString (Coordinate::Type type) |
| static void | set_wcs (::wcsprm &wcs) |
| Call wcsset on the wcs structure. More... | |
| static void | init_wcs (::wcsprm &wcs, int naxis) |
| Call wcsini on the wcs structure. More... | |
| static void | sub_wcs (const ::wcsprm &src, int &nsub, int axes[],::wcsprm &dst) |
| Call wcssub on the src/dst pair. More... | |
| static void | copy_wcs (const ::wcsprm &src,::wcsprm &dst) |
| Call wcssub on the src/dst pair with null nsub/axes. More... | |
Private Member Functions | |
| Bool | mapOne (Vector< Int > &worldAxisMap, Vector< Int > &worldAxisTranspose, Vector< Bool > &refChange, const CoordinateSystem &cSys, const CoordinateSystem &cSys2, const uInt coord, const uInt coord2) const |
| Helper functions to group common code. More... | |
| void | copy (const CoordinateSystem &other) |
| void | clear () |
| Bool | checkAxesInThisCoordinate (const Vector< Bool > &axes, uInt which) const |
| void | cleanUpSpecCoord (PtrBlock< SpectralCoordinate * > &in, PtrBlock< SpectralCoordinate * > &out) |
| Delete some pointer blocks. More... | |
| void | deleteTemps (const uInt which) |
| Delete temporary maps. More... | |
| void | makeWorldAbsRelMany (Matrix< Double > &value, Bool toAbs) const |
| Many abs/rel conversions. More... | |
| void | makePixelAbsRelMany (Matrix< Double > &value, Bool toAbs) const |
| StokesCoordinate | stokesSubImage (const StokesCoordinate &sc, Int originShift, Int pixincFac, Int newShape) const |
| Do subImage for Stokes. More... | |
| QualityCoordinate | qualitySubImage (const QualityCoordinate &qc, Int originShift, Int pixincFac, Int newShape) const |
| Do subImage for Quality. More... | |
| CoordinateSystem | stripRemovedAxes (const CoordinateSystem &cSys) const |
| Strip out coordinates with all world and pixel axes removed. More... | |
| void | listDirectionSystem (LogIO &os) const |
All these functions are in support of the list function. More... | |
| void | listFrequencySystem (LogIO &os, MDoppler::Types velocityType) const |
| void | listPointingCenter (LogIO &os) const |
| void | getFieldWidths (LogIO &os, uInt &widthAxis, uInt &widthCoordType, uInt &widthCoordNumber, uInt &widthName, uInt &widthProj, uInt &widthShape, uInt &widthTile, uInt &widthRefValue, uInt &widthRefPixel, uInt &widthInc, uInt &widthUnits, Int &precRefValSci, Int &precRefValFloat, Int &precRefValRADEC, Int &precRefPixFloat, Int &precIncSci, String &nameAxis, String &nameCoordType, String &nameCoordNumber, String &nameName, String &nameProj, String &nameShape, String &nameTile, String &nameRefValue, String &nameRefPixel, String &nameInc, String &nameUnits, MDoppler::Types velocityType, const IPosition &latticeShape, const IPosition &tileShape) const |
| void | listHeader (LogIO &os, Coordinate *pc, uInt &widthAxis, uInt &widthCoordType, uInt &widthCoordNumber, uInt &widthName, uInt &widthProj, uInt &widthShape, uInt &widthTile, uInt &widthRefValue, uInt &widthRefPixel, uInt &widthInc, uInt &widthUnits, Bool findWidths, Int coordinate, Int axisInCoordinate, Int pixelAxis, Int precRefValSci, Int precRefValFloat, Int precRefValRADEC, Int precRefPixFloat, Int precIncSci, const IPosition &latticeShape, const IPosition &tileShape) const |
| void | listVelocity (LogIO &os, Coordinate *pc, uInt widthAxis, uInt widthCoordType, uInt widthCoordNumber, uInt &widthName, uInt widthProj, uInt widthShape, uInt widthTile, uInt &widthRefValue, uInt widthRefPixel, uInt &widthInc, uInt &widthUnits, Bool findWidths, Int axisInCoordinate, Int pixelAxis, MDoppler::Types velocityType, Int precRefValSci, Int precRefValFloat, Int precRefValRADEC, Int precRefPixFloat, Int precIncSci) const |
| void | clearFlags (LogIO &os) const |
| Bool | velocityIncrement (Double &velocityInc, SpectralCoordinate &sc, MDoppler::Types velocityType, const String &velUnits) const |
| void | _downcase (Vector< String > &vec) const |
Static Private Member Functions | |
| static void | _initFriendlyAxisMap () |
Private Attributes | |
| PtrBlock< Coordinate * > | coordinates_p |
| Where we store copies of the coordinates we are created with. More... | |
| PtrBlock< Block< Int > * > | world_maps_p |
| For coordinate[i] axis[j], world_maps_p[i][j], if >=0 gives the location in the input vector that maps to this coord/axis, <0 means that the axis has been removed world_tmp_p[i] a temporary vector length coord[i]->nworldAxes() replacement_values_p[i][j] value to use for this axis if removed. More... | |
| PtrBlock< Vector< Double > * > | world_tmps_p |
| PtrBlock< Vector< Double > * > | world_replacement_values_p |
| PtrBlock< Block< Int > * > | pixel_maps_p |
| Same meanings as for the world*'s above. More... | |
| PtrBlock< Vector< Double > * > | pixel_tmps_p |
| PtrBlock< Vector< Double > * > | pixel_replacement_values_p |
| PtrBlock< Vector< Bool > * > | worldAxes_tmps_p |
| These temporaries all needed for the toMix function. More... | |
| PtrBlock< Vector< Bool > * > | pixelAxes_tmps_p |
| PtrBlock< Vector< Double > * > | worldOut_tmps_p |
| PtrBlock< Vector< Double > * > | pixelOut_tmps_p |
| PtrBlock< Vector< Double > * > | worldMin_tmps_p |
| PtrBlock< Vector< Double > * > | worldMax_tmps_p |
| ObsInfo | obsinfo_p |
| Miscellaneous information about the observation associated with this Coordinate System. More... | |
Static Private Attributes | |
| static const String | _class |
| static std::mutex | _mapInitMutex |
| static std::map< String, String > | _friendlyAxisMap |
Additional Inherited Members | |
| Public Types inherited from casacore::Coordinate | |
| enum | Type { LINEAR, DIRECTION, SPECTRAL, STOKES, TABULAR, QUALITY, COORDSYS } |
| This enum lists the types of the derived classes. More... | |
| enum | formatType { DEFAULT, SCIENTIFIC, FIXED, MIXED, TIME } |
| This enum is used for formatting world values into Strings. More... | |
| Protected Member Functions inherited from casacore::Coordinate | |
| Coordinate () | |
| Default constructor. More... | |
| Coordinate (const Coordinate &other) | |
| Copy constructor (copy semantics) More... | |
| Coordinate & | operator= (const Coordinate &other) |
| Assignment (copy semantics) More... | |
| void | set_error (const String &errorMsg) const |
| Set error message. More... | |
| Bool | find_scale_factor (String &error, Vector< Double > &factor, const Vector< String > &units, const Vector< String > &oldUnits) |
| void | fourierUnits (String &nameOut, String &unitOut, String &unitInCanon, Coordinate::Type type, Int axis, const String &unitIn, const String &nameIn) const |
| Tries to find a canonical unit for input unit (e.g. More... | |
| Bool | toWorldWCS (Vector< Double > &world, const Vector< Double > &pixel, wcsprm &wcs) const |
| Functions to interconvert pixel<->world via wcs. More... | |
| Bool | toPixelWCS (Vector< Double > &pixel, const Vector< Double > &world, wcsprm &wcs) const |
| Bool | toWorldManyWCS (Matrix< Double > &world, const Matrix< Double > &pixel, Vector< Bool > &failures, wcsprm &wcs) const |
| Bool | toPixelManyWCS (Matrix< Double > &pixel, const Matrix< Double > &world, Vector< Bool > &failures, wcsprm &wcs) const |
| void | toCurrentMany (Matrix< Double > &world, const Vector< Double > &toCurrentFactors) const |
| Functions for handling conversion between the current units and the wcs units. More... | |
| void | fromCurrentMany (Matrix< Double > &world, const Vector< Double > &toCurrentFactors) const |
| virtual void | convertTo (Vector< Double > &) const |
| Functions for handling conversion between the current reference frame and the native one. More... | |
| virtual void | convertFrom (Vector< Double > &) const |
| void | convertToMany (Matrix< Double > &world) const |
| Functions for handling conversion between the current reference frame and the native one for many conversions. More... | |
| void | convertFromMany (Matrix< Double > &world) const |
| void | pcToXform (Matrix< Double > &xForm, const wcsprm &wcs) const |
| Interconvert between wcs PC cards and Matrix xForm format. More... | |
| void | xFormToPC (wcsprm &wcs, const Matrix< Double > &xForm) const |
| Protected Attributes inherited from casacore::Coordinate | |
| Vector< Double > | worldMin_p |
| toMix ranges. More... | |
| Vector< Double > | worldMax_p |
Interconvert pixel and world coordinates.
Public interface
CoordinateSystem is the normal interface to coordinate systems, typically attached to an ImageInterface, however the coordinate system can be manipulated on its own. CoordinateSystem is in turn composed from various classes derived from the base class Coordinate.
The fundamental operations available to the user of a CoordinateSystem are:
CRPIX, PC, CDELT) to turn the pixel coordinates into relative world coordinates, followed by a (possibly) nonlinear projection to world coordinates (i.e. apply CTYPE and CRVAL), typically a sky projection or a frequency to velocity conversion. Note that an arbitrary rotation or linear transformation can be applied by changing the matrix. Note that all the knowledge to do with removing and transposing axes is maintained by the CoordinateSystem. The individual Coordinates, of which it is made, know nothing about this.
Although the CoordinateSystem exists in the absence of an image, the usual place you will find one is attached to an object derived from ImageInterface such as PagedImage. When you do so, the physical (or pixel) axes in the image map one to one with the pixel axes contained in the CoordinateSystem. It cannot be any other way as when you create a PagedImage, it is checked that there are equal numbers of image and CoordinateSystem pixel axes. It is up to the creator of the PagedImage to make sure that they are in the correct order.
However, the CoordinateSystem may have more world axes than pixel axes because it is possible to remove a pixel axis but not its associated world axis (for example for a moment image). Now, if you use the CoordinateSystem functions referencePixel and referenceValue, you will find the vector of reference values will have more values than the vector of reference pixels, if a pixel axis has been removed but not the world axis. You must use the ancilliary functions provided to find out what is where.
Let's consider an example where a CoordinateSystem consisted of a DirectionCoordinate and a SpectralCoordinate. Let us say that the first two pixel axes of the image associate (roughly of course because lines of constant RA and DEC are not parallel with the pixel coordinates) with the DirectionCoordinate (RA and DEC say) and the third pixel axis is the SpectralCoordinate. Now imagine we collapse the image along the second pixel axis (roughly, the DEC axis). For the output image, we remove the second pixel axis from the CoordinateSystem, but leave the world axis intact. This enables us to still be able to make coordinate conversions for the first (roughly RA) pixel axis. Thus, CoordinateSystem::referenceValue would return a Vector of length 3 (for RA, DEC and spectral), but CoordinateSystem::referencePixel would return a vector length 2 (for RA and spectral).
Now this CoordinateSystem has two Coordinates, a DirectionCoordinate and a SpectralCoordinate, and let us state that that is the order in which they exist in the CoordinateSystem (you can change them about if you wish); they are coordinates number 0 and 1. The DirectionCoordinate has two axes (RA and DEC) and the SpectralCoordinate has one axis. Only the CoordinateSystem knows about removed axes, the DirectionCoordinate itself is ignorant that it has been bisected. If you want to find out what axis in the Coordinate system is where, you can use the functions findPixelAxis or findWorldAxis.
If we asked the former to find pixel axis 0, it would tell us that the Coordinate number was 0 (the DirectionCoordinate) and that the axis in that coordinate was 0 (the first axis in a DirectionCoordinate is always longitude, the second always latitude). If we asked it to find pixel axis 1, it would tell us that the coordinate number was 1 (the SpectralCoordinate) and that the axis in that coordinate was 0 (there is only one axis in a SpectralCoordinate). If we asked for pixelAxis 2 that would generate an error because our squashed image only has 2 pixel axes.
Now, if we asked findWorldAxis similar questions, it would tell us that worldAxis 0 in the CoordinateSystem can be found in coordinate 0 (the DirectionCoordinate) in axis 0 of that DirectionCoordinate. Similarly, worldAxis 1 in the CoordinateSystem (which has not been removed) is in coordinate 0 (the DirectionCoordinate) in axis 1 of that Finally, worldAxis 2 in the CoordinateSystem is in coordinate 1 (the SpectralCoordinate) in axis 0 of that SpectralCoordinate.
Other handy functions are pixelAxes and worldAxes. These list the pixel and world axes in the CoordinateSystem for the specified coordinate. Thus, if we asked pixelAxes to find the pixel axes for coordinate 0 (the DirectionCoordinate) in the CoordinateSystem it would return a vector [0, -1] indicating the second axis of the DirectionCoordinate has been removed. However, the worldAxes function would return [0,1] as no world axis has been removed. Similarly, if operated on coordinate 1 (the SpectralCoordinate), pixelAxes would return [1] and worldAxes would return [2].
Because you can transpose the CoordinateSystem about, you should NEVER ASSUME ANYTHING except that the pixel axes of the CoordinateSystem map to the pixel axes of the image when you first construct the image.
SpectralCoordinate and DirectionCoordinate both have a (non-virtual) function called setReferenceConversion. This enables an extra conversion layer so that conversion between pixel and world can go to a reference frame other than the construction reference. When you use the function convert, these layers are active, but ONLY if the requested conversion is purely between pixel and world. For a SpectralCoordinate this must always be true (only has one axis) but for the DirectionCoordinate you might request a mixed pixel/world conversion. In this case, the extra conversion layer is ill-defined and not active (for the DirectionCoordinate part of it).
Caution: All pixels coordinates are zero relative;
See the example in Coordinates.h and tCoordinateSystem.cc
Coordinate systems for images.
Definition at line 217 of file CoordinateSystem.h.
| casacore::CoordinateSystem::CoordinateSystem | ( | ) |
Default constructor.
This is an empty CoordinateSystem.
| casacore::CoordinateSystem::CoordinateSystem | ( | const CoordinateSystem & | other | ) |
Copying constructor (copy semantics)
|
virtual |
Destructor.
Definition at line 987 of file CoordinateSystem.h.
References casacore::downcase(), and casacore::ArrayBase::size().
|
staticprivate |
| void casacore::CoordinateSystem::addCoordinate | ( | const Coordinate & | coord | ) |
Add another Coordinate to this CoordinateSystem.
This addition is done by copying, so that if coord changes the change is NOT reflected in the CoordinateSystem.
|
private |
|
private |
Delete some pointer blocks.
|
private |
|
private |
|
virtual |
Make a copy of the CoordinateSystem using new.
The caller is responsible for calling delete.
Implements casacore::Coordinate.
| Bool casacore::CoordinateSystem::convert | ( | Vector< Double > & | coordOut, |
| const Vector< Double > & | coordin, | ||
| const Vector< Bool > & | absIn, | ||
| const Vector< String > & | unitsIn, | ||
| MDoppler::Types | dopplerIn, | ||
| const Vector< Bool > & | absOut, | ||
| const Vector< String > & | unitsOut, | ||
| MDoppler::Types | dopplerOut, | ||
| Double | pixInOffset = 0.0, |
||
| Double | pixOutOffset = 0.0 |
||
| ) |
General coordinate conversion.
Only works if no axes have been removed and no axis reordering has occurred. That is pixel axes and world axes are the same.
Specify the input coordinate values, input units, whether value is absolute (or relative). For output specify units and abs/rel. Units may be 'pix' and velocity consistent units (e.g. m/s). Specify doppler types if velocities involved. The pixel offsets allow for the input and output pixel coordinates to be something other than 0-rel. If your pixel coordinates are 1-rel input and output, set the offsets to -1 and 1
The Matrix interface lets you do many conversions efficiently. Use Matrix(nAxes, nConversions) and Matrix.column()=coordinate or Matrix(axis, iConversion) to get the order right.
These functions invoke toMix so make sure you call setWorldMixRanges first to set up the world ranges.
| Bool casacore::CoordinateSystem::convert | ( | Matrix< Double > & | coordOut, |
| const Matrix< Double > & | coordIn, | ||
| const Vector< Bool > & | absIn, | ||
| const Vector< String > & | unitsIn, | ||
| MDoppler::Types | dopplerIn, | ||
| const Vector< Bool > & | absOut, | ||
| const Vector< String > & | unitsOut, | ||
| MDoppler::Types | dopplerOut, | ||
| Double | pixInOffset = 0.0, |
||
| Double | pixOutOffset = 0.0 |
||
| ) |
| const Coordinate& casacore::CoordinateSystem::coordinate | ( | uInt | which | ) | const |
Return the given Coordinate as a reference to the base class object.
Return the name of the record field in which the coordinate is stored.
|
private |
|
private |
Delete temporary maps.
Get the pixel axis numbers of the direction coordinate in this object.
The order of the returned axis numbers is always longitude axis first, latitude axis second.
| const DirectionCoordinate& casacore::CoordinateSystem::directionCoordinate | ( | ) | const |
| const DirectionCoordinate& casacore::CoordinateSystem::directionCoordinate | ( | uInt | which | ) | const |
| Int casacore::CoordinateSystem::directionCoordinateNumber | ( | ) | const |
| Int casacore::CoordinateSystem::findCoordinate | ( | Coordinate::Type | type, |
| Int | afterCoord = -1 |
||
| ) | const |
Find the Coordinate number that corresponds to the given type.
Since there might be more than one Coordinate of a given type you can call this multiple times setting afterCoord to the last value found. Returns -1 if a Coordinate of the desired type is not found.
| void casacore::CoordinateSystem::findPixelAxis | ( | Int & | coordinate, |
| Int & | axisInCoordinate, | ||
| uInt | axisInCoordinateSystem | ||
| ) | const |
| void casacore::CoordinateSystem::findWorldAxis | ( | Int & | coordinate, |
| Int & | axisInCoordinate, | ||
| uInt | axisInCoordinateSystem | ||
| ) | const |
Given an axis number (pixel or world) in the CoordinateSystem, find the corresponding coordinate number and axis in that Coordinate.
The returned values are set to -1 if the axis does not exist.
|
virtual |
Format a world value nicely through the common format interface.
See Coordinate for basics.
You specify a world value and its corresponding world axis in the CoordinateSystem.
For the specified worldAxis, the coordinate number in the CoordinateSystem is found and the actual derived Coordinate class object for that number is created. The arguments to the formatting function are then passed on to the formatter for that Coordinate. So refer to the other derived Coordinate classes for specifics on the formatting.
Reimplemented from casacore::Coordinate.
|
static |
Probably even if we return False we should set up the best linear coordinate that we can.
Use oneRelative=True to convert one-relative FITS pixel coordinates to zero-relative Casacore coordinates. On output, stokesFITSValue holds the FITS value of any unofficial Stokes (beam, optical depth, spectral index) for the last unofficial value accessed (-1 if none). The idea is that if the Stokes axis is of length one and holds an unofficial value, you should drop the STokes axis and convert that value to ImageInfo::ImageTypes with ImageInfo::imageTypeFromFITSValue. If on input, stokesFITSValue is positive, then a warning is issued if any unofficial values are encountered. Otherwise no warning is issued.
|
private |
| Vector<Int> casacore::CoordinateSystem::getWorldAxesOrder | ( | Vector< String > & | myNames, |
| Bool | requireAll, | ||
| Bool | allowFriendlyNames = False |
||
| ) | const |
Get the 0 based order of the minimal match strings specified in order.
If requireAll is True, checks are done to ensure that all axes in the coordinate system are uniquely specified in order. If allowFriendlyNames is True, the following (fully specified) strings will match the specified axes: "spectral" matches both "frequency" and "velocity". "ra" matches "right ascension".
| Bool casacore::CoordinateSystem::hasDirectionCoordinate | ( | ) | const |
| Bool casacore::CoordinateSystem::hasLinearCoordinate | ( | ) | const |
|
inline |
Definition at line 791 of file CoordinateSystem.h.
References hasPolarizationCoordinate().
| Bool casacore::CoordinateSystem::hasPolarizationCoordinate | ( | ) | const |
does this coordinate system have a polarizaion/stokes coordinate?
Referenced by hasPolarizationAxis().
| Bool casacore::CoordinateSystem::hasQualityAxis | ( | ) | const |
Does this coordinate system have a quality axis?
| Bool casacore::CoordinateSystem::hasSpectralAxis | ( | ) | const |
Does this coordinate system have a spectral axis?
Implements casacore::Coordinate.
| Bool casacore::CoordinateSystem::isDirectionAbscissaLongitude | ( | ) | const |
Is the abscissa in the DirectionCoordinate the longitude axis? Throws exception if there is no DirectionCoordinate or if either of the direction pixel axes have been removed.
For a normal direction coordinate, this will return True.
| const LinearCoordinate& casacore::CoordinateSystem::linearCoordinate | ( | uInt | which | ) | const |
Return the given Coordinate.
Throws an exception if retrieved as the wrong type. The versions which take no parameters will return the first (or in most cases only) coordinate of the requested type. If no such coordinate exists, an exception is thrown.
| Int casacore::CoordinateSystem::linearCoordinateNumber | ( | ) | const |
Implements casacore::Coordinate.
| Vector<String> casacore::CoordinateSystem::list | ( | LogIO & | os, |
| MDoppler::Types | doppler, | ||
| const IPosition & | latticeShape, | ||
| const IPosition & | tileShape, | ||
| Bool | postLocally = False |
||
| ) | const |
List all header information.
By default, the reference values and pixel increments are converted to a "nice" unit before formatting (e.g. RA is shown as HH:MM:SS.S). For spectral axes, both frequency and velocity information is listed. You can specify what velocity definition you want with velocityType If you wish, you can specify two shapes; a lattice and tile shape (perhaps an image from which the CoordinateSystem came) If you give (both of) these, they are included in the listing. If you pass in zero length IPositions then they are not included in the listing. If postlocally=True the formatted summary lines are written locally only to the sink, and then returned by the return value vector.
|
private |
All these functions are in support of the list function.
|
private |
|
private |
|
private |
|
private |
|
virtual |
Find the CoordinateSystem (you can safely caste the pointer to a CoordinateSystem) for when we Fourier Transform ourselves.
This pointer must be deleted by the caller. Axes specifies which pixel axes of the Coordinate System you wish to transform. Shape specifies the shape of the image associated with all the axes of the CoordinateSystem. Currently you have no control over the reference pixel, it is always shape/2.
Reimplemented from casacore::Coordinate.
|
virtual |
Reimplemented from casacore::Coordinate.
|
virtual |
Reimplemented from casacore::Coordinate.
|
private |
|
virtual |
Make absolute coordinates relative and vice-versa (relative to the reference pixel/value).
The vectors must be of length nPixelAxes() or nWorldAxes()
Reimplemented from casacore::Coordinate.
|
virtual |
Batch up a lot of absolute/relative transformations.
Parameters as above for toWorldMany and toPixelMany
Reimplemented from casacore::Coordinate.
|
virtual |
Reimplemented from casacore::Coordinate.
|
virtual |
Reimplemented from casacore::Coordinate.
|
virtual |
Make absolute coordinates relative and vice versa with respect to the given reference value.
Add the other functions in this grouping as needed. The vectors must be of length nPixelAxes() or nWorldAxes()
Reimplemented from casacore::Coordinate.
|
private |
Many abs/rel conversions.
|
virtual |
Reimplemented from casacore::Coordinate.
|
virtual |
Reimplemented from casacore::Coordinate.
|
private |
Helper functions to group common code.
| uInt casacore::CoordinateSystem::nCoordinates | ( | ) | const |
Returns the number of Coordinates that this CoordinateSystem contains.
The order might be unrelated to the axis order through the results of transposing and removing axes.
|
virtual |
Comparison function.
Any private Double data members are compared with the specified fractional tolerance. Don't compare on the specified pixel axes in the CoordinateSystem. If the comparison returns False, errorMessage() contains a message about why.
Implements casacore::Coordinate.
|
virtual |
Implements casacore::Coordinate.
| Bool casacore::CoordinateSystem::nearPixel | ( | const CoordinateSystem & | other, |
| Double | tol = 1e-6 |
||
| ) | const |
This function compares this and the other coordinate system, but ONLY for the non-removed pixel axes.
It is less strict than near, which, for example, insists the number of coordinates is the same in each CS
|
virtual |
Sums the number of axes in the Coordinates that the CoordinateSystem contains, allowing for removed axes.
Implements casacore::Coordinate.
|
virtual |
Implements casacore::Coordinate.
| ObsInfo casacore::CoordinateSystem::obsInfo | ( | ) | const |
Miscellaneous information related to an observation, for example the observation date.
| CoordinateSystem& casacore::CoordinateSystem::operator= | ( | const CoordinateSystem & | other | ) |
Assignment (copy semantics).
Find the world axis for the given pixel axis in a CoordinateSystem.
Returns -1 if the world axis is unavailable (e.g. if it has been removed).
| Bool casacore::CoordinateSystem::pixelMap | ( | Vector< Int > & | pixelAxisMap, |
| Vector< Int > & | pixelAxisTranspose, | ||
| const CoordinateSystem & | cSys | ||
| ) | const |
What is the number of the polarization/stokes axis? If doWorld=True, the world axis number is returned.
Otherwise, the pixel axis number is returned. Returns -1 if the stokes axis (world c.q. pixel) does not exist.
| Int casacore::CoordinateSystem::polarizationCoordinateNumber | ( | ) | const |
what is the number of the polarization/stokes coordinate? Returns -1 if no stokes coordinate exists.
| Int casacore::CoordinateSystem::qualityAxisNumber | ( | ) | const |
what number is the quality axis? Returns -1 if no quality axis exists.
| const QualityCoordinate& casacore::CoordinateSystem::qualityCoordinate | ( | uInt | which | ) | const |
| Int casacore::CoordinateSystem::qualityCoordinateNumber | ( | ) | const |
what is the number of the quality coordinate? Returns -1 if no quality coordinate exists.
Given a quality parameter, find the pixel location.
Note the client is responsible for any boundedness checks (eg finite number of quality in an image).
|
private |
Do subImage for Quality.
Implements casacore::Coordinate.
Implements casacore::Coordinate.
Remove a world or pixel axis.
When its value is required for forward or backwards transformations, use replacement
When a world axis is removed, the corresponding pixel axis is removed too, because it makes no sense having a pixel axis without world coordinates.
Removing a pixel axis without removing the corresponding world axis is, however, possible and meaningful. It can be used when e.g. a frequency plane is taken from a cube. The plane has 2 pixel axes, but the 3rd world axis can still describe the frequency coordinate. See also the functions in CoordinateUtil for removing lists of pixel/world axes (tricky because they shift down)
False is returned (an error in errorMessage() will be set) if the axis is illegal, else returns True.
| Bool casacore::CoordinateSystem::replaceCoordinate | ( | const Coordinate & | newCoordinate, |
| uInt | whichCoordinate | ||
| ) |
Replace one Coordinate with another.
The mapping of the coordinate axes to the CoordinateSystem axes is unchanged, therefore the number of world and pixel axes must not be changed. You can, somewhat dangerously, change the type of the coordinate however. For example, replace a SpectralCoordinate with a 1-D Linearcoordinate. It is dangerous because the world replacement values (see removeWorldAxis) have to be scaled. The algorithm tries to find a scale factor between the old and new units and applies it to the replacement values. If it can't find a scale factor (non-conformant units) then the reference value is used for any world replacement values. If the latter occurs, it returns False, else True is returned.
|
static |
Restore the CoordinateSystem from a record.
The fieldName can be empty, in which case the CoordinateSystem is restored directly from the Record, rather than a subrecord of it. A null pointer means that the restoration did not succeed - probably because fieldName doesn't exist or doesn't contain a CoordinateSystem.
| void casacore::CoordinateSystem::restoreOriginal | ( | ) |
Untranspose and undelete all axes.
Does not undo the effects of subimaging.
|
virtual |
Save the CoordinateSystem into the supplied record using the supplied field name.
The field must not exist, otherwise False is returned. If the CoordinateSystem is empty False is also returned. If False is returned, errorMessage() contains a message about why.
Implements casacore::Coordinate.
|
virtual |
Reimplemented from casacore::Coordinate.
Implements casacore::Coordinate.
|
virtual |
Implements casacore::Coordinate.
| void casacore::CoordinateSystem::setObsInfo | ( | const ObsInfo & | obsinfo | ) |
|
virtual |
Implements casacore::Coordinate.
|
virtual |
Implements casacore::Coordinate.
Set rest frequency of SpectralCoordinate in CoordinateSystem.
Unit must be consistent with Hz or m. Returns False if invalid inputs (and CS not changed) and an error message.
| Bool casacore::CoordinateSystem::setSpectralConversion | ( | String & | errorMsg, |
| const String | frequencySystem | ||
| ) |
Set Spectral conversion layer of SpectralCoordinate in CoordinateSystem so that pixel<->world go to the specified frequency system (a valid MFrequency::Types string).
Returns False if frequency system invalid or if no DirectionCoordinate or if cant get Date/Epoch.
| void casacore::CoordinateSystem::setSpectralConversion | ( | const String | frequencySystem | ) |
This version throws an exception rather than returning False.
|
virtual |
Set the requested attribute.
Note that these just change the internal values, they do not cause any recomputation.
Implements casacore::Coordinate.
|
virtual |
Set/get the units.
Adjust the increment and reference value by the ratio of the old and new units. This implies that the units must be known Unit strings, and that they must be compatible, e.g. they can't change from time to length. If throwException=True, throw an exception rather than returning False on failure.
Implements casacore::Coordinate.
| Bool casacore::CoordinateSystem::setWorldAxisUnits | ( | const Vector< String > & | units, |
| Bool | throwException | ||
| ) |
Compute and recover the world min and max ranges, for use in function toMix, for a lattice of the given shape (must be of length nPixelAxes()).
Removed pixel axes (with remaining world axes are handled). With the retrieval functions, the output vectors are resized. They return False if they fail (and then setDefaultWorldMixRanges generates the ranges) with a reason in errorMessage(). The setDefaultWorldMixRanges function gives you a useful default range if you don't know the shape. The only Coordinate type for which these ranges are actually used in toMix is DirectionCoordinate (because its coupled). For the rest the functionality is provided but never used by toMix.
Reimplemented from casacore::Coordinate.
Returns the type of the given Coordinate as a string.
|
virtual |
Always returns "System".
Implements casacore::Coordinate.
What number is the spectral axis? If doWorld=True, the world axis number is returned.
Otherwise, the pixel axis number is returned. Returns -1 if the spectral axis (world c.q. pixel) does not exist.
| const SpectralCoordinate& casacore::CoordinateSystem::spectralCoordinate | ( | uInt | which | ) | const |
| const SpectralCoordinate& casacore::CoordinateSystem::spectralCoordinate | ( | ) | const |
| Int casacore::CoordinateSystem::spectralCoordinateNumber | ( | ) | const |
what number is the spectral coordinate? Returns -1 if no spectral coordinate exists.
| const StokesCoordinate& casacore::CoordinateSystem::stokesCoordinate | ( | ) | const |
| const StokesCoordinate& casacore::CoordinateSystem::stokesCoordinate | ( | uInt | which | ) | const |
Given a stokes or polarization parameter, find the pixel location.
Note the client is responsible for any boundedness checks (eg finite number of stokes in an image).
|
private |
Do subImage for Stokes.
|
private |
Strip out coordinates with all world and pixel axes removed.
| CoordinateSystem casacore::CoordinateSystem::subImage | ( | const Vector< Float > & | originShift, |
| const Vector< Float > & | incrFac, | ||
| const Vector< Int > & | newShape | ||
| ) | const |
Return a CoordinateSystem appropriate for a shift of origin (the shift is subtracted from the reference pixel) and change of increment (the increments are multipled by the factor).
Both vectors should be of length nPixelAxes().
The newShape vector is only needed for the StokesCoordinate, if any. If this vector is of length zero, the new StokesCoordinate is formed from all of the available input Stokes after application of the shift and increment factor. Otherwise, the new Stokes axis length is equal to that specified after appliction of the shift and increment and excess values discarded. In addition, for any StokesCoordinate, the shift and factor must be integer. So Int(value+0.5) is taken before they are used.
| void casacore::CoordinateSystem::subImageInSitu | ( | const Vector< Float > & | originShift, |
| const Vector< Float > & | incrFac, | ||
| const Vector< Int > & | newShape | ||
| ) |
| const TabularCoordinate& casacore::CoordinateSystem::tabularCoordinate | ( | uInt | which | ) | const |
| Bool casacore::CoordinateSystem::toFITSHeader | ( | RecordInterface & | header, |
| IPosition & | shape, | ||
| Bool | oneRelative, | ||
| Char | prefix = 'c', |
||
| Bool | writeWCS = True, |
||
| Bool | preferVelocity = True, |
||
| Bool | opticalVelocity = True, |
||
| Bool | preferWavelength = False, |
||
| Bool | airWavelength = False |
||
| ) | const |
Convert a CoordinateSystem to FITS, i.e.
fill in ctype etc. In the record the keywords are vectors, it is expected that the actual FITS code will split them into scalars and upcase the names. Returns False if one of the keywords is already taken.
If writeWCS is True, attempt to write the WCS convention (Greisen and Calabretta "Representation of celestial coordinates in FITS"). Use oneRelative=True to convert zero-relative pixel coordinates to one-relative FITS coordinates.
prefix gives the prefix for the FITS keywords. E.g., if prefix="c" then crval, cdelt etc. if prefix="d" then drval, ddelt etc.
|
virtual |
Mixed pixel/world coordinate conversion.
worldIn and worldAxes are of length nworldAxes. pixelIn and pixelAxes are of length nPixelAxes. worldAxes(i)=True specifies you have given a world value in worldIn(i) to convert to pixel. pixelAxes(i)=True specifies you have given a pixel value in pixelIn(i) to convert to world. You cannot specify the same axis via worldAxes and pixelAxes. Values in pixelIn are converted to world and put into worldOut in the appropriate world axis location. Values in worldIn are copied to worldOut. Values in worldIn are converted to pixel and put into pixelOut in the appropriate pixel axis location. Values in pixelIn are copied to pixelOut. Vectors worldMin and worldMax specify the range of the world coordinate (in the world axis units of that world axis in the coordinate system) being solved for in a mixed calculation for each world axis. They are only actually used for DirectionCoordinates and for all other coordinates the relevant elements are ignored. Functions setWorldMixRanges, worldMixMin, worldMixMax can be used to compute and recover the world ranges. If you don't know the values, use functions setDefaultWorldMixRanges, worldMixMin, worldMixMax. Removed axes are handled (for example, a removed pixel axis with remaining corresponding world axis will correctly be converted to world using the replacement value). Returns True if the conversion succeeds, otherwise it returns False and errorMessage() contains an error message. The output vectors are resized.
Reimplemented from casacore::Coordinate.
|
virtual |
Implements casacore::Coordinate.
|
virtual |
This one throws an exception rather than returning False.
|
virtual |
Reimplemented from casacore::Coordinate.
|
virtual |
Convert a pixel position to a world position or vice versa.
Returns True if the conversion succeeds, otherwise it returns False and errorMessage() contains an error message. The input vector must be of length nPixelAxes or nWorldAxes. The output vector is resized appropriately. if useConversionFrame, if the coordinate has a conversion layer frame (such as can be present in spectral and direction coordinates), it is used. Else, the native frame is used for the conversion.
Implements casacore::Coordinate.
|
virtual |
This one throws an exception rather than returning False.
After all, that's what exceptions are for.
| Bool casacore::CoordinateSystem::toWorld | ( | Vector< Double > & | world, |
| const IPosition & | pixel | ||
| ) | const |
This is provided as a convenience since it is a very commonly desired operation through CoordinateSystem.
The output vector is resized.
|
virtual |
convert a pixel "length" to a world "length"
|
virtual |
Batch up a lot of transformations.
The first (most rapidly varying) axis of the matrices contain the coordinates. Returns False if any conversion failed and errorMessage() will hold a message. The failures array (True for fail, False for success) is the length of the number of conversions and holds an error status for each conversion.
Reimplemented from casacore::Coordinate.
| void casacore::CoordinateSystem::transpose | ( | const Vector< Int > & | newWorldOrder, |
| const Vector< Int > & | newPixelOrder | ||
| ) |
Transpose the CoordinateSystem so that world axis 0 is newWorldOrder(0) and so on for all the other axes.
newPixelOrder works similarly. Normally you will give the same transformation vector for both the world and pixel transformations, however this is not required.
| Coordinate::Type casacore::CoordinateSystem::type | ( | uInt | whichCoordinate | ) | const |
Return the type of the given Coordinate.
|
virtual |
Returns Coordinate::COORDSYS
Implements casacore::Coordinate.
|
private |
For a given Coordinate say where its world and pixel axes are in this CoordinateSystem.
The position in the returned Vector is its axis number in the Coordinate, and its value is the axis number in the CoordinateSystem. If the value is less than zero the axis has been removed from this CoordinateSystem.
Return the requested attribute.
Implements casacore::Coordinate.
Find the pixel axis for the given world axis in a CoordinateSystem.
Returns -1 if the pixel axis is unavailable (e.g. if it has been removed).
Implements casacore::Coordinate.
| Bool casacore::CoordinateSystem::worldMap | ( | Vector< Int > & | worldAxisMap, |
| Vector< Int > & | worldAxisTranspose, | ||
| Vector< Bool > & | refChange, | ||
| const CoordinateSystem & | cSys | ||
| ) | const |
Find the world and pixel axis mappings to the supplied CoordinateSystem from the current coordinate system.
False is returned if either the supplied or current coordinate system, has no world axes (and a message recoverable with function errorMessage indicating why). Otherwise True is returned. worldAxisMap(i) is the location of world axis i (from the supplied CoordinateSystem, cSys, in the current CoordinateSystem. worldAxisTranspose(i) is the location of world axis i (from the current CoordinateSystem) in the supplied CoordinateSystem, cSys. The output vectors are resized appropriately by this function. A value of -1 in either vector means that the axis could not be found in the other CoordinateSystem. The vector refChange says if the types are the same, is there a reference type change (e.g. TOPO versus LSR for the SpectralCoordinate, or J2000 versus GALACTIC for DirectionCoordinate). Thus if refChange(i) is True, it means world axis i in the current CoordinateSystem was matched, but has a different reference type to that of the supplied CoordinateSystem.
|
staticprivate |
Definition at line 905 of file CoordinateSystem.h.
Definition at line 907 of file CoordinateSystem.h.
|
staticprivate |
Definition at line 906 of file CoordinateSystem.h.
|
private |
Where we store copies of the coordinates we are created with.
Definition at line 876 of file CoordinateSystem.h.
|
private |
Miscellaneous information about the observation associated with this Coordinate System.
Definition at line 903 of file CoordinateSystem.h.
Same meanings as for the world*'s above.
Definition at line 889 of file CoordinateSystem.h.
Definition at line 891 of file CoordinateSystem.h.
Definition at line 890 of file CoordinateSystem.h.
Definition at line 895 of file CoordinateSystem.h.
Definition at line 897 of file CoordinateSystem.h.
For coordinate[i] axis[j], world_maps_p[i][j], if >=0 gives the location in the input vector that maps to this coord/axis, <0 means that the axis has been removed world_tmp_p[i] a temporary vector length coord[i]->nworldAxes() replacement_values_p[i][j] value to use for this axis if removed.
Definition at line 884 of file CoordinateSystem.h.
Definition at line 886 of file CoordinateSystem.h.
Definition at line 885 of file CoordinateSystem.h.
These temporaries all needed for the toMix function.
Definition at line 894 of file CoordinateSystem.h.
Definition at line 899 of file CoordinateSystem.h.
Definition at line 898 of file CoordinateSystem.h.
Definition at line 896 of file CoordinateSystem.h.
1.8.5