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# 

# LSST Data Management System 

# 

# Copyright 2008-2016 AURA/LSST. 

# 

# This product includes software developed by the 

# LSST Project (http://www.lsst.org/). 

# 

# This program is free software: you can redistribute it and/or modify 

# it under the terms of the GNU General Public License as published by 

# the Free Software Foundation, either version 3 of the License, or 

# (at your option) any later version. 

# 

# This program is distributed in the hope that it will be useful, 

# but WITHOUT ANY WARRANTY; without even the implied warranty of 

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

# GNU General Public License for more details. 

# 

# You should have received a copy of the LSST License Statement and 

# the GNU General Public License along with this program. If not, 

# see <https://www.lsstcorp.org/LegalNotices/>. 

# 

import os 

import numpy as np 

import unittest 

 

import lsst.geom 

import lsst.afw.geom as afwGeom 

import lsst.afw.math as afwMath 

import lsst.afw.table as afwTable 

import lsst.afw.image as afwImage 

import lsst.meas.algorithms as measAlg 

import lsst.utils.tests 

 

try: 

type(verbose) 

except NameError: 

verbose = 0 

display = False 

 

 

class CoaddApCorrMapTest(lsst.utils.tests.TestCase): 

 

def testCoaddApCorrMap(self): 

"""Check that we can create and use a coadd ApCorrMap.""" 

coaddBox = lsst.geom.Box2I(lsst.geom.Point2I(0, 0), lsst.geom.Extent2I(100, 100)) 

scale = 5.0e-5*lsst.geom.degrees 

cdMatrix = afwGeom.makeCdMatrix(scale=scale) 

crval = lsst.geom.SpherePoint(0.0, 0.0, lsst.geom.degrees) 

center = lsst.geom.Point2D(lsst.geom.Extent2D(coaddBox.getDimensions())*0.5) 

coaddWcs = afwGeom.makeSkyWcs(crpix=lsst.geom.Point2D(0, 0), crval=crval, cdMatrix=cdMatrix) 

schema = afwTable.ExposureTable.makeMinimalSchema() 

weightKey = schema.addField("customweightname", type="D", doc="Coadd weight") 

catalog = afwTable.ExposureCatalog(schema) 

 

# Non-overlapping 

num = 5 

inputBox = lsst.geom.Box2I(lsst.geom.Point2I(0, 0), lsst.geom.Extent2I(10, 10)) 

validBox = lsst.geom.Box2I(lsst.geom.Point2I(0, 0), lsst.geom.Extent2I(7, 7)) 

pointList = [] 

pointListValid = [] 

 

for i in range(num): 

value = np.array([[1]], dtype=float) # Constant with value = i+1 

apCorrMap = afwImage.ApCorrMap() 

bf = afwMath.ChebyshevBoundedField(inputBox, value*(i + 1)) 

apCorrMap.set("only", bf) 

 

point = lsst.geom.Point2D(0, 0) - lsst.geom.Extent2D(coaddBox.getDimensions())*(i+0.5)/num 

wcs = afwGeom.makeSkyWcs(crpix=point, crval=crval, cdMatrix=cdMatrix) 

center = inputBox.getCenter() 

pointList.append(coaddWcs.skyToPixel(wcs.pixelToSky(center))) 

 

# This point will only be valid for the second overlapping record 

pointValid = center + lsst.geom.Extent2D(4, 4) 

pointListValid.append(coaddWcs.skyToPixel(wcs.pixelToSky(pointValid))) 

 

# A record with the valid polygon defining a limited region 

record = catalog.getTable().makeRecord() 

record.setWcs(wcs) 

record.setBBox(inputBox) 

record.setApCorrMap(apCorrMap) 

record.set(weightKey, i + 1) 

record['id'] = i 

record.setValidPolygon(afwGeom.Polygon(lsst.geom.Box2D(validBox))) 

catalog.append(record) 

 

# An overlapping record with the whole region as valid 

record = catalog.getTable().makeRecord() 

record.setWcs(wcs) 

record.setBBox(inputBox) 

apCorrMap = afwImage.ApCorrMap() 

bf = afwMath.ChebyshevBoundedField(inputBox, value*(i + 2)) 

apCorrMap.set("only", bf) 

record.setApCorrMap(apCorrMap) 

record.set(weightKey, i + 2) 

record['id'] = i + num 

record.setValidPolygon(afwGeom.Polygon(lsst.geom.Box2D(inputBox))) 

catalog.append(record) 

 

apCorrMap = measAlg.makeCoaddApCorrMap(catalog, coaddBox, coaddWcs, "customweightname") 

# This will test a point where both records contribute 

self.assertApCorrMap(apCorrMap, pointList) 

# Only the second record will be valid for this point 

self.assertApCorrMapValid(apCorrMap, pointListValid) 

 

filename = os.path.join(os.path.dirname(os.path.realpath(__file__)), "coaddApCorrMap.fits") 

exposure = afwImage.ExposureF(1, 1) 

exposure.getInfo().setApCorrMap(apCorrMap) 

exposure.writeFits(filename) 

exposure = afwImage.ExposureF(filename) 

self.assertApCorrMap(exposure.getInfo().getApCorrMap(), pointList) 

self.assertApCorrMapValid(exposure.getInfo().getApCorrMap(), pointListValid) 

os.unlink(filename) 

 

def assertApCorrMap(self, apCorrMap, pointList): 

for i, point in enumerate(pointList): 

weights = [i + 1, i + 2] 

values = [i + 1, i + 2] 

expected = sum((w*v for w, v in zip(weights, values)), 0.0)/sum(weights) 

actual = apCorrMap["only"].evaluate(point) 

self.assertEqual(actual, expected) 

 

def assertApCorrMapValid(self, apCorrMap, pointList): 

for i, point in enumerate(pointList): 

weights = [i + 2] 

values = [i + 2] 

expected = sum((w*v for w, v in zip(weights, values)), 0.0)/sum(weights) 

actual = apCorrMap["only"].evaluate(point) 

self.assertEqual(actual, expected) 

 

 

class TestMemory(lsst.utils.tests.MemoryTestCase): 

pass 

 

 

def setup_module(module): 

lsst.utils.tests.init() 

 

 

141 ↛ 142line 141 didn't jump to line 142, because the condition on line 141 was never trueif __name__ == "__main__": 

lsst.utils.tests.init() 

unittest.main()