In reply to @imincik:matrix.org
I spent some time on fixing #238882 , but it looked to me as some kind of bug or problem on GDAL side. I was not able to find any problem in our packaging. l0b0 , have you seen it working (is for example Debian package or GDAL docker image working as expected ?)

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

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 :)