ee.Image.index raises AttributeError on median-reduced image #42
Description
Hi @davemlz! I don't think this is really an eemont bug, but I'm wondering if you know of a good workaround or if maybe there's an eemont feature that could help with this.
Describe the bug
If you use a reducer other than ee.Reducer.first on an ImageCollection and then try to use the index method, an attribute error is thrown. I think this is because Earth Engine reducers like ee.Reducer.median don't preserve image metadata that's needed for _get_platform_STAC to work.
I'm not sure exactly what metadata _get_platform_STAC needs, but maybe I could fix this by setting or copying some properties after running median?
To Reproduce
import ee, eemont
ee.Initialize()
s2 = ee.ImageCollection("COPERNICUS/S2_SR")
pt = ee.Geometry.Point([-122.276437, 44.803428])
img = (s2
.filterBounds(pt)
.filterDate("2020-01-01", "2020-01-30")
# Using .first() instead would fix the problem
.median()
)
img = img.index("NDSI")---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_14264/966081019.py in <module>
10 )
11
---> 12 img = img.index("NDSI")
~\anaconda3\envs\salvage\lib\site-packages\eemont\image.py in index(self, index, G, C1, C2, L, cexp, nexp, alpha, slope, intercept, kernel, sigma, p, c, online)
746 )
747
--> 748 return _index(
749 self,
750 index,
~\anaconda3\envs\salvage\lib\site-packages\eemont\common.py in _index(self, index, G, C1, C2, L, cexp, nexp, alpha, slope, intercept, kernel, sigma, p, c, online)
417 Image (or Image Collection) with the computed spectral index, or indices, as new bands.
418 """
--> 419 platformDict = _get_platform_STAC(self)
420
421 if isinstance(sigma, int) or isinstance(sigma, float):
~\anaconda3\envs\salvage\lib\site-packages\eemont\common.py in _get_platform_STAC(args)
46 args, ee.image.Image
47 ):
---> 48 pltID = "/".join(ID.split("/")[:-1])
49 elif eeDict[platform]["gee:type"] == "image" and isinstance(
50 args, ee.imagecollection.ImageCollection
AttributeError: 'NoneType' object has no attribute 'split'Setup (please complete the following information):
- OS: Windows 10
- python version 3.9.6
- eemont version 0.2.5
- earthengine-api version 0.1.279
Additional context
Thanks!