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cryogars / ice-road-copters

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Edge artifacts ~60m present in USGS dem.tif #2

Closed brentwilder closed 2 years ago

brentwilder commented 2 years ago

EDIT: The differencing of .laz and .tif files of our lidar files show odd edge artifacts.. Is this because I am only using one of the .laz files for my testing (220317_175436_VQ-580.laz)? Do you see this when you run on your computer Zach?

snow

EDIT again: after more investigating, I can confirm this is originating from the USGS 1 meter DEM. When clipping the dem.tif to the corners where I am seeing the edge effects, this is the result:

issue

This may be an issue of how we are reprojecting the py3dep data.. Are we mosaicing first and then reprojecting?

--brent

brentwilder commented 2 years ago

Tested with data straight from https://apps.nationalmap.gov/downloader/ and found no streaks/tiling. This means the issue is directly in py3dep. Going to write a formal issue on their GitHub page.