In reply to @imincik:matrix.org
What about opening issue in GDAL ?

In reply to @vengmark2:matrix.org
Looks like there's already a relevant issue. I'll try building libtiff with lerc to see if that fixes it…

In reply to @vengmark2:matrix.org
Looks like there's already a relevant issue. I'll try building libtiff with lerc to see if that fixes it…

You should be able to verify with

git checkout l0b0/libtiff-lerc-support
git cherry-pick l0b0/gdal-test-separation
git cherry-pick l0b0/gdal-lerc-support
nix-build --attr pkgs.gdal.passthru.tests

You should be able to verify with

git checkout l0b0/libtiff-lerc-support
git cherry-pick l0b0/gdal-test-separation
git cherry-pick l0b0/gdal-lerc-support
nix-build --attr pkgs.gdal.passthru.tests.compress-lerc

You should be able to verify with

git checkout l0b0/libtiff-lerc-support
git cherry-pick l0b0/gdal-test-separation
git cherry-pick l0b0/gdal-lerc-support
nix-build --attr pkgs.gdal.passthru.tests.compress-lerc

(It takes forever to build, though.)

What about trying tiffinfo to check which compression is enabled

./result-bin/bin/tiffinfo ~/Projects/osgeo/qgis/code/tests/testdata/raster_layer.tiffTIFFReadDirectory: Warning, Unknown field with tag 33550 (0x830e) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 33922 (0x8482) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 34735 (0x87af) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 34736 (0x87b0) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 34737 (0x87b1) encountered.
=== TIFF directory 0 ===
TIFF Directory at offset 0x67b86 (424838)
  Image Width: 337 Image Length: 315
  Resolution: 36, 36 pixels/inch
  Bits/Sample: 8
  Compression Scheme: None
  Photometric Interpretation: RGB color
  Extra Samples: 1<unassoc-alpha>
  Orientation: row 0 top, col 0 lhs
  Samples/Pixel: 4
  Rows/Strip: 6
  Planar Configuration: single image plane
  Tag 33550: 0.146439,0.146439,0.000000
  Tag 33922: 0.000000,0.000000,0.000000,-124.091282,56.207996,0.000000
  Tag 34735: 1,1,0,7,1024,0,1,2,1025,0,1,1,2048,0,1,4326,2049,34737,7,0,2054,0,1,9102,2057,34736,1,1,2059,34736,1,0
  Tag 34736: 298.257224,6378137.000000
  Tag 34737: WGS 84|

In reply to @vengmark2:matrix.org
I did verify using that (or one of the other executables included in libtiff; I don't remember), but I don't know of any good TIFFs I could use for the test. Ideally I'd use libtiff to create a 1x1 LERC TIFF and then read its info, but libtiff doesn't seem to come with CLI tools to create TIFFs.

In reply to @imincik:matrix.org
Then use gdal to create the tiff file.

Something like

gdal_create -outsize 10 10 -co COMPRESS=LERC_DEFLATE test.tif

gdalinfo works as well

with gdal: Test LERC support #290292 I am able to do:

nix-build -A gdal

./result/bin/gdal_create -outsize 10 10 -co COMPRESS=LERC_DEFLATE test.tif

./result/bin/gdalinfo test.tif
Driver: GTiff/GeoTIFF
Files: test.tif
Size is 10, 10
Image Structure Metadata:
  COMPRESSION=LERC_DEFLATE
  INTERLEAVE=BAND
  LERC_VERSION=2.4
Corner Coordinates:
Upper Left  (    0.0,    0.0)
Lower Left  (    0.0,   10.0)
Upper Right (   10.0,    0.0)
Lower Right (   10.0,   10.0)
Center      (    5.0,    5.0)
Band 1 Block=10x10 Type=Byte, ColorInterp=Gray

In reply to @imincik:matrix.org
So many issues in those few instructions in elevation README :)

In reply to @vengmark2:matrix.org
Would it be useful to add enable* ? true parameters for each of the optional dependencies, in case someone wants a minimal libtiff? Or is that too much control?

Here's a bit of a conundrum: poetry run pytest -s scripts/stac/imagery/tests/collection_test.py::test_capture_area_added in this branch gets different results on NixOS unstable and Ubuntu 22.04. I've narrowed it down to this line. It returns almost identical polygons, with one extra vertex generated on Ubuntu. The shapely docs don't mention anything relevant, but I'd like to understand why this is happening to avoid flaky tests.

Some more investigation reveals that the additional vertex seems to be the midpoint between two other vertices, and should've been removed by simplify.