def testIntersect(self):
"""Tests polygon sky-pixel intersection.
"""
qs1 = skypix.QuadSpherePixelization(3, 0.0)
polygons = [qs1.getGeometry(qs1.id(r, 1, 1), True) for r in range(6)]
qs2 = skypix.QuadSpherePixelization(4, 0.0)
results = [
set([
qs2.id(r, 1, 1),
qs2.id(r, 2, 1),
qs2.id(r, 1, 2),
qs2.id(r, 2, 2)
]) for r in range(6)
]
for poly, res in zip(polygons, results):
self.assertEqual(set(qs2.intersect(poly)), res)
def testIdAndCoord(self):
for R in (3, 4, 16, 17):
qs = skypix.QuadSpherePixelization(R, 0.0)
self.assertEqual(len(qs), 6 * R**2)
for i in range(6 * R**2):
root, x, y = qs.coords(i)
self.assertEqual(qs.id(root, x, y), i)
def testPixel(self):
"""Verifies that the center of pixel P is mapped back to P.
"""
for R in (64, 65):
qs = skypix.QuadSpherePixelization(R, 0.0)
for i in qs:
c = geom.sphericalCoords(qs.getCenter(i))
pixelId = qs.pixel(math.radians(c[0]), math.radians(c[1]))
self.assertEqual(i, pixelId)
def testGeometry(self):
"""Verifies that pixels are contained in their padded selves.
"""
for R in (4, 5):
qs = skypix.QuadSpherePixelization(R, math.radians(1.0))
for i in range(6 * R**2):
pixel = qs.getGeometry(i, True)
paddedPixel = qs.getGeometry(i, False)
self.assertTrue(paddedPixel.contains(pixel))
def testPrune1(self):
coords = []
for ra, dec in [(0.0, 0.0), (0.1, 0.1), (0.0, 90.0), (0.0, -90.0)]:
coords.append(afwCoord.IcrsCoord(ra * degrees, dec * degrees))
res = 3
qs = skypix.QuadSpherePixelization(res, 0.0)
root, x, y = 1, 1, 1
skyTileId = qs.id(root, x, y)
skyTile = utils.PT1SkyTile(res, root, x, y, skyTileId)
numContained = sum(skyTile.contains(s) for s in coords)
self.assertEqual(numContained, 2)
def testSpiral(self):
"""Tests that pixels are ordered in an approximate spiral.
"""
for R in (17, 32):
qs = skypix.QuadSpherePixelization(R, 0.0)
lag = 8 * R
for i in qs:
neighbors = qs.getNeighbors(i)
maxN = max(neighbors)
minN = min(neighbors)
self.assertTrue(maxN - i < lag)
self.assertTrue(i - minN < lag)
def testPrune2(self):
coarseRes = 3
subdiv = 6
fineRes = coarseRes * subdiv
coarseQs = skypix.QuadSpherePixelization(coarseRes, 0.0)
fineQs = skypix.QuadSpherePixelization(fineRes, 0.0)
for skyTileId in coarseQs:
root, cx, cy = coarseQs.coords(skyTileId)
skyTile = utils.PT1SkyTile(coarseRes, root, cx, cy, skyTileId)
for cid in coarseQs:
root2, cx2, cy2 = coarseQs.coords(cid)
for x in xrange(cx2 * subdiv, (cx2 + 1) * subdiv):
for y in xrange(cy2 * subdiv, (cy2 + 1) * subdiv):
pixelCenter = geom.sphericalCoords(
fineQs.getCenter(fineQs.id(root2, x, y)))
s = afwCoord.IcrsCoord(pixelCenter[0] * degrees,
pixelCenter[1] * degrees)
if root == root2 and cx == cx2 and cy == cy2:
self.assertEqual(skyTile.contains(s), True)
else:
self.assertEqual(skyTile.contains(s), False)
def testNeighborCommutativity(self):
"""Tests that if pixel P1 is a neighbor of pixel P2,
then P2 is a neighbor of P1.
"""
for R in (16, 17):
qs = skypix.QuadSpherePixelization(R, 0.0)
for root in range(6):
# test root pixel edges and corners
for i in range(R - 1):
self._checkNeighborCommutativity(qs, root, i, 0)
self._checkNeighborCommutativity(qs, root, 0, i)
self._checkNeighborCommutativity(qs, root, i, R - 1)
self._checkNeighborCommutativity(qs, root, R - 1, i)
# test root pixel centers
self._checkNeighborCommutativity(qs, root, R // 2, R // 2)
def testNeighborProximity(self):
"""Tests that neighbors of a pixel P are close to P.
"""
tolerance = 1.0
for R in (180, 181):
qs = skypix.QuadSpherePixelization(R, 0.0)
for root in range(6):
# test root pixel edges and corners
for i in range(R - 1):
self._checkNeighbors(qs, root, i, 0, tolerance)
self._checkNeighbors(qs, root, 0, i, tolerance)
self._checkNeighbors(qs, root, i, R - 1, tolerance)
self._checkNeighbors(qs, root, R - 1, i, tolerance)
# test root pixel centers
self._checkNeighbors(qs, root, R // 2, R // 2, tolerance)
def run(
rerun, # Rerun name
stack, # Stack identifier
filter, # Filter name
field, # Field name
scale, # Scale, arcsec/pix
):
io = pipReadWrite.ReadWrite(hsc.HscSimMapper(rerun=rerun),
['visit', 'ccd'])
skyPolicy = io.inButler.get('skypolicy')
print skyPolicy.toString()
sky = skypix.QuadSpherePixelization(
skyPolicy.get('resolutionPix'),
skyPolicy.get('paddingArcsec') / 3600.0)
dataId = {'filter': filter}
if field is not None:
dataId['field'] = field
skytiles = io.inButler.queryMetadata('calexp', None, 'skyTile', dataId)
for tile in skytiles:
dataId['skyTile'] = tile
visits = io.inButler.queryMetadata('calexp', None, 'visit', dataId)
if len(visits) == 0:
continue
geom = sky.getGeometry(tile)
bbox = geom.getBoundingBox()
ra, dec = bbox.getCenter() # Degrees
theta = bbox.getThetaExtent() # Width, degrees
size = int(theta * 3600.0 / scale) # Size, pixels
cmd = "hsc_stack.py --rerun " + rerun
cmd += " --stack %d" % stack
cmd += " --patch %d" % tile
cmd += " --filter %s" % filter
cmd += " --coords %f %f" % (ra, dec)
cmd += " --scale %f" % scale
cmd += " --sizes %d %d" % (size, size)
cmd += " --frames %s" % ":".join(map(str, visits))
cmd += " --ignore"
print cmd
