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LSST Data Management Base Package
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Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
lsst.skymap.tractInfo.ExplicitTractInfo Class Reference
Inheritance diagram for lsst.skymap.tractInfo.ExplicitTractInfo:
lsst.skymap.tractInfo.TractInfo

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.

416 def __init__(self, id, tractBuilder, ctrCoord, radius, tractOverlap, wcs):
417 # We don't want TractInfo setting the bbox on the basis of vertices,
418 # but on the radius.
419 vertexList = []
420 self._radius = radius
421 super(ExplicitTractInfo, self).__init__(id, tractBuilder, ctrCoord,
422 vertexList, tractOverlap, wcs)
423 # Shrink the box slightly to make sure the vertices are in the tract
424 bboxD = geom.BoxD(self.getBBox())
425 bboxD.grow(-0.001)
426 finalWcs = self.getWcs()
427 self._vertexCoordList = finalWcs.pixelToSky(bboxD.getCorners())
428
A floating-point coordinate rectangle geometry.
Definition Box.h:413

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.

429 def _minimumBoundingBox(self, wcs):
430 """Calculate the minimum bounding box for the tract, given the WCS, and
431 the nominated radius.
432 """
433 bbox = geom.Box2D()
434 for i in range(4):
435 cornerCoord = self._ctrCoord.offset(i*90*geom.degrees, self._radius + self._tractOverlap)
436 pixPos = wcs.skyToPixel(cornerCoord)
437 bbox.include(pixPos)
438 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.


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