lsst.skymap.tractInfo.ExplicitTractInfo Class Reference

Inheritance diagram for lsst.skymap.tractInfo.ExplicitTractInfo:

Public Member Functions
	__init__ (self, id, tractBuilder, ctrCoord, radius, tractOverlap, wcs)

Protected Member Functions
	_minimumBoundingBox (self, wcs)

Protected Attributes
	_radius
	_vertexCoordList

Detailed Description

Information for a tract specified explicitly.

A tract is placed at the explicitly defined coordinates, with the nominated
radius.  The tracts are square (i.e., the radius is really a half-size).

Definition at line 410 of file tractInfo.py.

Constructor & Destructor Documentation

__init__()

lsst.skymap.tractInfo.ExplicitTractInfo.__init__	(		self,
			id,
			tractBuilder,
			ctrCoord,
			radius,
			tractOverlap,
			wcs )

Reimplemented from lsst.skymap.tractInfo.TractInfo.

Definition at line 416 of file tractInfo.py.

    def __init__(self, id, tractBuilder, ctrCoord, radius, tractOverlap, wcs):
        # We don't want TractInfo setting the bbox on the basis of vertices,
        # but on the radius.
        vertexList = []
        self._radius = radius
        super(ExplicitTractInfo, self).__init__(id, tractBuilder, ctrCoord,
                                                vertexList, tractOverlap, wcs)
        # Shrink the box slightly to make sure the vertices are in the tract
        bboxD = geom.BoxD(self.getBBox())
        bboxD.grow(-0.001)
        finalWcs = self.getWcs()
        self._vertexCoordList = finalWcs.pixelToSky(bboxD.getCorners())
 

Member Function Documentation

_minimumBoundingBox()

lsst.skymap.tractInfo.ExplicitTractInfo._minimumBoundingBox ( self, wcs )

protected

Calculate the minimum bounding box for the tract, given the WCS, and
the nominated radius.

Reimplemented from lsst.skymap.tractInfo.TractInfo.

Definition at line 429 of file tractInfo.py.

    def _minimumBoundingBox(self, wcs):
        """Calculate the minimum bounding box for the tract, given the WCS, and
        the nominated radius.
        """
        bbox = geom.Box2D()
        for i in range(4):
            cornerCoord = self._ctrCoord.offset(i*90*geom.degrees, self._radius + self._tractOverlap)
            pixPos = wcs.skyToPixel(cornerCoord)
            bbox.include(pixPos)
        return bbox

Member Data Documentation

_radius

lsst.skymap.tractInfo.ExplicitTractInfo._radius

protected

Definition at line 420 of file tractInfo.py.

_vertexCoordList

lsst.skymap.tractInfo.ExplicitTractInfo._vertexCoordList

protected

Definition at line 427 of file tractInfo.py.

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The documentation for this class was generated from the following file:

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-8.0.0/Linux64/skymap/ga8c6da7877+71e4819109/python/lsst/skymap/tractInfo.py