Some HLS S2 images have non-standard coordinate reference systems

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mshahbaz_000
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Some HLS S2 images have non-standard coordinate reference systems

by mshahbaz_000 » Thu Jan 18, 2024 9:22 pm America/New_York

In some of the HLS Sentinel-2 v2.0 images, the coordinate reference system of the image is not standard and does not have any authentication ID (i.e. there is no EPSG).

An example, is the "HLS.S30.T09VXD.2020275T194239.v2.0". Once I downloaded different bands of this tile, the definition of its CRS starts like this:
"UTM Zone 9, Northern Hemisphere",
BASEGEOGCRS["Unknown datum based upon the WGS 84 ellipsoid",
DATUM["Not specified (based on WGS 84 spheroid)" ...

Can you please clarify why this non-standard CRS definition happens? In my example above, it should have had an authentication ID of EPSG:32609 as does another images from the zone "HLS.S30.T09VXD.2020130T193911.v2.0", whose CRS is correct: EPSG:32609 - WGS 84 / UTM zone 9N

GIS libraries like OSGEO do not recognize the two coordinate reference systems that I mentioned above as the same ones and in my programs this raises an error.

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LP DAAC - dgolon
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Re: Some HLS S2 images have non-standard coordinate reference systems

by LP DAAC - dgolon » Thu Feb 22, 2024 12:06 pm America/New_York

Hello @mshahbaz_000 I apologize, we missed your question. I am checking on an answer with our Science Data Lifecycle team and will report back when I have an answer. Thanks --Danielle
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