lsst.afw.geom¶

Using lsst.afw.geom¶

Using lsst.afw.geom.SpanSet to represent irregular regions of pixels

Contributing¶

lsst.afw.geom is developed at https://github.com/lsst/afw. You can find Jira issues for this module under the afw component.

Python API reference¶

lsst.afw.geom Package¶

Functions¶

`calculateSipWcsHeader`(wcs, order, bbox, spacing)	Generate a SIP WCS header approximating a given `SkyWcs`
`computePixelToDistortedPixel`(...)	Compute the transform `pixelToDistortedPixel`, which applies optical distortion specified by `focalPlaneToFieldAngle`.
`createTrivialWcsMetadata`(wcsName, xy0)
`deleteBasicWcsMetadata`(metadata, wcsName)
`getCdMatrixFromMetadata`(metadata)
`getImageXY0FromMetadata`(metadata, wcsName[, ...])
`getIntermediateWorldCoordsToSky`(wcs[, simplify])
`getPixelToIntermediateWorldCoords`(wcs[, ...])
`getSipMatrixFromMetadata`(metadata, name)	Extract a SIP matrix from FITS TAN-SIP WCS metadata.
`hasSipMatrix`(metadata, name)
`linearizeTransform`(original, point)
`makeCdMatrix`(scale[, orientation, flipX])
`makeFlippedWcs`(wcs, flipLR, flipTB, center)
`makeHpxWcs`(hips_order, pixel[, shift_order])	Make a SkyWcs object with HEALPix grid projection (HPX).
`makeIdentityTransform`()
`makeModifiedWcs`(pixelTransform, wcs, ...)
`makeRadialTransform`(args, *kwargs)	Overloaded function.
`makeSimpleWcsMetadata`(crpix, crval, cdMatrix)
`makeSipMatrixMetadata`(matrix, name)
`makeSkyWcs`(args, *kwargs)	Overloaded function.
`makeTanSipMetadata`(args, *kwargs)	Overloaded function.
`makeTanSipWcs`(args, *kwargs)	Overloaded function.
`makeTransform`(affine)
`makeWcsPairTransform`(src, dst)
`stripWcsMetadata`(metadata)
`transformFromString`(data)	Read a Transform from a string that was saved using `Transform.writeString`
`wcsAlmostEqualOverBBox`(wcs0, wcs1, bbox[, ...])	Test if two `WCS` are almost equal over a grid of pixel positions.

Classes¶

`AffineTransformConfig`(args, *kw)	A Config representing an affine `Transform`.
`Ellipse`
`GenericEndpoint`
`IdentityTransformConfig`(args, *kw)	A Config representing a `Transform` that does nothing.
`MultiTransformConfig`(args, *kw)	A Config representing a chain of consecutive `Transforms`.
`OneTransformConfig`(args, *kw)	A Config representing a single `Transform` in a compound `Transform`.
`Point2Endpoint`
`Polygon`
`Quadrupole`
`RadialTransformConfig`(args, *kw)	A Config representing a radially symmetric `Transform`.
`SipApproximation`
`SkyWcs`
`Span`
`SpanIterator`
`SpanSet`
`SpherePointEndpoint`
`Stencil`	Members:
`TransformConfig`(args, *kw)	Config that identifies `Transforms` by keyword.
`TransformGenericToGeneric`
`TransformGenericToPoint2`
`TransformGenericToSpherePoint`
`TransformPoint2ToGeneric`
`TransformPoint2ToPoint2`
`TransformPoint2ToSpherePoint`
`TransformSpherePointToGeneric`
`TransformSpherePointToPoint2`
`TransformSpherePointToSpherePoint`

Class Inheritance Diagram¶

lsst.afw.geom.testUtils Module¶

Functions¶

`makeSipIwcToPixel`(metadata)	Make an IWC to pixel transform with SIP distortion from FITS-WCS metadata
`makeSipPixelToIwc`(metadata)	Make a pixel to IWC transform with SIP distortion from FITS-WCS metadata

Classes¶

BoxGrid(box, numColRow)

Divide a box into nx by ny sub-boxes that tile the region

Class Inheritance Diagram¶