def _qa(self, img):
qa_band = img.select("pixel_qa")
qaCloud = geeutils.extract_bits(qa_band, start=5, new_name="cloud_mask").eq(0)
qaShadow = geeutils.extract_bits(qa_band, start=3, new_name="shadow_mask").eq(0)
qaSnow = geeutils.extract_bits(qa_band, start=4, new_name="snow_mask").eq(0)
mask = qaCloud.And(qaShadow) # .And(qaSnow)
return img.updateMask(mask)
def _qa(self, img):
qa = img.select("state_1km")
cloudMask = geeutils.extract_bits(qa, 10, end=11, new_name="cloud_qa").lt(1)
shadowMask = geeutils.extract_bits(qa, 2, new_name="shadow_qa").Not()
snowMask = geeutils.extract_bits(qa, 12, new_name="snow_qa").Not()
sensorZenith = img.select("SensorZenith").abs().lt(6000)
mask = cloudMask.And(shadowMask).And(snowMask).And(sensorZenith)
return img.updateMask(mask)
def qa(self, img):
"""Custom QA masking method for MODIS MXD09GA dataset"""
qa = img.select("state_1km")
cloudMask = geeutils.extract_bits(qa, 10, end=11,
new_name="cloud_qa").lt(1)
shadowMask = geeutils.extract_bits(qa, 2, new_name="shadow_qa").Not()
snowMask = geeutils.extract_bits(qa, 12, new_name="snow_qa").Not()
sensorZenith = img.select("SensorZenith").abs().lt(6000)
mask = cloudMask.And(shadowMask).And(snowMask).And(sensorZenith)
return img.updateMask(mask)
def _qa(self, img):
cloudMask = geeutils.extract_bits(
img.select("QF1"), 2, end=3, new_name="cloud_qa"
).lt(1)
shadowMask = geeutils.extract_bits(
img.select("QF2"), 3, new_name="shadow_qa"
).Not()
snowMask = geeutils.extract_bits(img.select("QF2"), 5, new_name="snow_qa").Not()
sensorZenith = img.select("SensorZenith").abs().lt(6000)
mask = cloudMask.And(shadowMask).And(sensorZenith)
return img.updateMask(mask)
def qa(self, img):
"""Custom QA masking method for Landsat7 surface reflectance dataset"""
qa_band = img.select("pixel_qa")
qaCloud = geeutils.extract_bits(qa_band,
start=5,
new_name="cloud_mask").eq(0)
qaShadow = geeutils.extract_bits(qa_band,
start=3,
new_name="shadow_mask").eq(0)
qaSnow = geeutils.extract_bits(qa_band, start=4,
new_name="snow_mask").eq(0)
mask = qaCloud.And(qaShadow).And(qaSnow)
return img.updateMask(mask)
def qa(self, img):
"""Custom QA masking method for VIIRS VNP09GA dataset"""
cloudMask = geeutils.extract_bits(img.select("QF1"),
2,
end=3,
new_name="cloud_qa").lt(1)
shadowMask = geeutils.extract_bits(img.select("QF2"),
3,
new_name="shadow_qa").Not()
snowMask = geeutils.extract_bits(img.select("QF2"),
5,
new_name="snow_qa").Not()
sensorZenith = img.select("SensorZenith").abs().lt(6000)
mask = cloudMask.And(shadowMask).And(sensorZenith)
return img.updateMask(mask)
