def testTractSeparation(self):
"""Confirm that each sky tract has the proper distance to other tracts
"""
for numTracts in (2, 4, 25):
for minDec in (-45, -2.5, 32):
for deltaDec in (2, 17):
maxDec = minDec + deltaDec
config = EquatSkyMap.ConfigClass()
config.numTracts = numTracts
config.decRange = (minDec, maxDec)
skyMap = EquatSkyMap(config)
predDeltaRa = 360.0 / numTracts
for tractId, tractInfo in enumerate(skyMap):
self.assertEqual(tractInfo.getId(), tractId)
prevTract, nextTract = self.getNeighborTracts(
skyMap, tractId)
deltaRa = tractInfo.getCtrCoord().getRa(
) - prevTract.getCtrCoord().getRa()
deltaRa = deltaRa.asDegrees()
raError = abs(deltaRa - predDeltaRa) % 180.0
self.assertAlmostEquals(raError, 0.0)
deltaRa = nextTract.getCtrCoord().getRa(
) - tractInfo.getCtrCoord().getRa()
deltaRa = deltaRa.asDegrees()
raError = abs(deltaRa - predDeltaRa) % 180.0
self.assertAlmostEquals(raError, 0.0)
def testSymmetry(self):
"""Verify that the projection is symmetrical about the equator
"""
for minDec in (-5.0, -1.0, 0.5):
maxDec = minDec + 2.0
config = EquatSkyMap.ConfigClass()
config.decRange = minDec, maxDec
skyMap = EquatSkyMap(config)
for tractInfo in skyMap[0:1]:
numPatches = tractInfo.getNumPatches()
midXIndex = numPatches[0]//2
minPixelPosList = []
maxPixelPosList = []
maxYInd = numPatches[1] - 1
for xInd in (0, midXIndex, numPatches[0] - 1):
minDecPatchInfo = tractInfo.getPatchInfo((xInd, 0))
minDecPosBox = geom.Box2D(minDecPatchInfo.getOuterBBox())
minPixelPosList += [
minDecPosBox.getMin(),
geom.Point2D(minDecPosBox.getMaxX(), minDecPosBox.getMinY()),
]
maxDecPatchInfo = tractInfo.getPatchInfo((xInd, maxYInd))
maxDecPosBox = geom.Box2D(maxDecPatchInfo.getOuterBBox())
maxPixelPosList += [
maxDecPosBox.getMax(),
geom.Point2D(maxDecPosBox.getMinX(), maxDecPosBox.getMaxY()),
]
wcs = tractInfo.getWcs()
minDecList = [wcs.pixelToSky(pos).getPosition(geom.degrees)[1] for pos in minPixelPosList]
maxDecList = [wcs.pixelToSky(pos).getPosition(geom.degrees)[1] for pos in maxPixelPosList]
self.assertTrue(numpy.allclose(minDecList, minDecList[0]))
self.assertTrue(numpy.allclose(maxDecList, maxDecList[0]))
self.assertTrue(minDecList[0] <= minDec)
self.assertTrue(maxDecList[0] >= maxDec)
def testFindTract(self):
"""Test the SkyMap.findTract method
"""
for numTracts in (2, 4):
config = EquatSkyMap.ConfigClass()
config.numTracts = numTracts
skyMap = EquatSkyMap(config)
decRange = skyMap.config.decRange
decList = (
(decRange[0] * 0.999) + (decRange[1] * 0.901),
(decRange[0] * 0.500) + (decRange[1] * 0.500),
(decRange[0] * 0.091) + (decRange[1] * 0.999),
)
for tractInfo0 in skyMap:
tractId0 = tractInfo0.getId()
ctrCoord0 = tractInfo0.getCtrCoord()
for tractInfo1 in self.getNeighborTracts(skyMap, tractId0):
tractId1 = tractInfo1.getId()
ctrCoord1 = tractInfo1.getCtrCoord()
for deltaFrac in (-0.001, 0.001):
v0 = ctrCoord0.getVector() * (0.5 + deltaFrac)
v1 = ctrCoord1.getVector() * (0.5 - deltaFrac)
testVec = v0 + v1
testRa = geom.SpherePoint(testVec).getRa()
if deltaFrac > 0.0:
expectedTractId = tractId0
else:
expectedTractId = tractId1
for testDecDeg in decList:
testDec = geom.Angle(testDecDeg, geom.degrees)
testCoord = geom.SpherePoint(testRa, testDec)
nearestTractInfo = skyMap.findTract(testCoord)
nearestTractId = nearestTractInfo.getId()
self.assertEqual(nearestTractId, expectedTractId)
patchInfo = nearestTractInfo.findPatch(testCoord)
pixelInd = geom.Point2I(nearestTractInfo.getWcs().skyToPixel(testCoord))
self.assertTrue(patchInfo.getInnerBBox().contains(pixelInd))
# find a point outside the tract and make sure it fails
tractInfo = tractInfo0
wcs = tractInfo.getWcs()
bbox = geom.Box2D(tractInfo.getBBox())
outerPixPosList = [
bbox.getMin() - geom.Extent2D(1, 1),
geom.Point2D(bbox.getMaxX(), bbox.getMinY()) - geom.Extent2D(1, 1),
bbox.getMax() + geom.Extent2D(1, 1),
geom.Point2D(bbox.getMinX(), bbox.getMaxY()) + geom.Extent2D(1, 1),
]
for outerPixPos in outerPixPosList:
testCoord = wcs.pixelToSky(outerPixPos)
self.assertRaises(LookupError, tractInfo.findPatch, testCoord)
def testMoreBasicAttributes(self):
"""Confirm that constructor attributes are available.
"""
defaultSkyMap = self.getSkyMap()
for numTracts in (1, 2, 4, 25):
config = EquatSkyMap.ConfigClass()
config.numTracts = numTracts
skyMap = EquatSkyMap(config)
self.assertEqual(len(skyMap), numTracts)
if numTracts == defaultSkyMap.config.numTracts:
self.assertEqual(skyMap, defaultSkyMap)
else:
self.assertNotEqual(skyMap, defaultSkyMap)
for decRange in ([-1.3, 0.5], [6.1, 6.8]):
config = EquatSkyMap.ConfigClass()
config.decRange = decRange
skyMap = EquatSkyMap(config)
self.assertNotEqual(skyMap, defaultSkyMap)
def testBasicAttributes(self):
"""Confirm that constructor attributes are available
"""
for numTracts in (1, 2, 4, 25):
config = EquatSkyMap.ConfigClass()
config.numTracts = numTracts
skyMap = EquatSkyMap(config)
self.assertEqual(len(skyMap), numTracts)
for tractOverlap in (0.0, 0.01, 0.1): # degrees
config = EquatSkyMap.ConfigClass()
config.tractOverlap = tractOverlap
skyMap = EquatSkyMap(config)
for tractInfo in skyMap:
self.assertAlmostEqual(tractInfo.getTractOverlap().asDegrees(),
tractOverlap)
self.assertEqual(len(skyMap), skyMap.config.numTracts)
for patchBorder in (0, 101):
config = EquatSkyMap.ConfigClass()
config.patchBorder = patchBorder
skyMap = EquatSkyMap(config)
for tractInfo in skyMap:
self.assertEqual(tractInfo.getPatchBorder(), patchBorder)
self.assertEqual(len(skyMap), skyMap.config.numTracts)
skyMapClass = skyMapRegistry["equat"]
for xInnerDim in (1005, 5062):
for yInnerDim in (2032, 5431):
config = skyMapClass.ConfigClass()
config.patchInnerDimensions = (xInnerDim, yInnerDim)
skyMap = EquatSkyMap(config)
for tractInfo in skyMap:
self.assertEqual(
tuple(tractInfo.getPatchInnerDimensions()),
(xInnerDim, yInnerDim))
self.assertEqual(len(skyMap), skyMap.config.numTracts)
def test_gettingPatchInfo(self):
skyMap = EquatSkyMap(EquatSkyMap.ConfigClass())
tract = skyMap[0]
# Look up patchInfo with a coordinate pair
patchIndex = (3, 5)
pairPatchInfo = tract.getPatchInfo(patchIndex)
# Fetch the sequential index
sequentialPatchIndex = tract.getSequentialPatchIndex(pairPatchInfo)
# Turn the sequential index back into a pair
returnedPatchIndex = tract.getPatchIndexPair(sequentialPatchIndex)
# Test that the different indexes match
self.assertEqual(patchIndex, returnedPatchIndex)
# verify patch info can be retrieved with both indexes
sequentialPatchInfo = tract.getPatchInfo(sequentialPatchIndex)
self.assertEqual(pairPatchInfo, sequentialPatchInfo)
def testDefaults(self):
"""Test important default values
"""
config = EquatSkyMap.ConfigClass()
skyMap = EquatSkyMap(config)
self.assertEqual(skyMap.config.projection, "CEA")
def testFindTract(self):
"""Test the findTract method
"""
for numTracts in (2, 4):
config = EquatSkyMap.ConfigClass()
config.numTracts = numTracts
skyMap = EquatSkyMap(config)
decRange = skyMap.config.decRange
decList = (
(decRange[0] * 0.999) + (decRange[1] * 0.901),
(decRange[0] * 0.500) + (decRange[1] * 0.500),
(decRange[0] * 0.091) + (decRange[1] * 0.999),
)
for tractInfo0 in skyMap:
tractId0 = tractInfo0.getId()
ctrCoord0 = tractInfo0.getCtrCoord()
vector0 = numpy.array(ctrCoord0.getVector())
for tractInfo1 in self.getNeighborTracts(skyMap, tractId0):
tractId1 = tractInfo1.getId()
ctrCoord1 = tractInfo1.getCtrCoord()
vector1 = numpy.array(ctrCoord1.getVector())
for deltaFrac in (-0.001, 0.001):
# this fuss is because Point3D does not support * float
v0 = [
v * (0.5 + deltaFrac)
for v in ctrCoord0.getVector()
]
v1 = [
v * (0.5 - deltaFrac)
for v in ctrCoord1.getVector()
]
testVec = afwGeom.Point3D(*(v0[i] + v1[i]
for i in range(3)))
testRa = afwCoord.IcrsCoord(testVec).getRa()
if deltaFrac > 0.0:
expectedTractId = tractId0
else:
expectedTractId = tractId1
for testDecDeg in decList:
testDec = afwGeom.Angle(testDecDeg,
afwGeom.degrees)
testCoord = afwCoord.IcrsCoord(testRa, testDec)
nearestTractInfo = skyMap.findTract(testCoord)
nearestTractId = nearestTractInfo.getId()
self.assertEqual(nearestTractId, expectedTractId)
patchInfo = nearestTractInfo.findPatch(testCoord)
pixelInd = afwGeom.Point2I(
nearestTractInfo.getWcs().skyToPixel(
testCoord.toIcrs()))
self.assertTrue(
patchInfo.getInnerBBox().contains(pixelInd))
# find a point outside the tract and make sure it fails
tractInfo = tractInfo0
wcs = tractInfo.getWcs()
bbox = afwGeom.Box2D(tractInfo.getBBox())
outerPixPosList = [
bbox.getMin() - afwGeom.Extent2D(1, 1),
afwGeom.Point2D(bbox.getMaxX(), bbox.getMinY()) -
afwGeom.Extent2D(1, 1),
bbox.getMax() + afwGeom.Extent2D(1, 1),
afwGeom.Point2D(bbox.getMinX(), bbox.getMaxY()) +
afwGeom.Extent2D(1, 1),
]
for outerPixPos in outerPixPosList:
testCoord = wcs.pixelToSky(outerPixPos)
self.assertRaises(LookupError, tractInfo.findPatch,
testCoord)