Le 09/01/2023 à 20:22, Rahkonen Jukka a écrit :
Hi,
I noticed that the survey foot is now deemed obsolete
https://www.nist.gov/pml/us-surveyfoot since 1^st of January.
Should/could there be warnings in GDAL/Proj about that? Or will also
the corresponding entries in the EPSG database become obsolete in time?
The US government rightly wants to fix the future, but it can't fix the
past. I bet that the use of CRS using US Survey Foot will outlive all of
us. IMHO, I don't think it is GDAL/Proj responsibility to do anything
special regarding that. Probably that tagging those CRS in the EPSG
database will indeed be the next action, but I believe this should be
with care as it could have surprising effects. Probably the supersession
mechanism would be more appropriate than deprecation (deprecation in
EPSG is often used to tag broken entries. there is nothing broken with
US Survey Foot)
Even
-Jukka Rahkonen-
*Lähettäjä:*gdal-dev <gdal-dev-boun...@lists.osgeo.org> *Puolesta
*Even Rouault
*Lähetetty:* maanantai 9. tammikuuta 2023 21.10
*Vastaanottaja:* Kirk Waters - NOAA Federal <kirk.wat...@noaa.gov>;
gdal-dev@lists.osgeo.org
*Aihe:* Re: [gdal-dev] feet converting to meters unexpectedly
Hi,
This is indeed https://github.com/OSGeo/gdal/issues/6839
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which has been fixed in GDAL 3.6.1.
Even
Le 09/01/2023 à 19:48, Kirk Waters - NOAA Federal via gdal-dev a écrit :
I think I've gotten this solved for my purposes now, but I'm
reporting it here in case anyone else might run across issues
using gdal in a conda environment. If I make a conda environment
containing:
python
pdal=2.4.2
gdal
(which ends up with gdal version 3.5.1, pdal version 2.4.2), I get
a weird behavior where
gdalwarp input.tif output.tif
will change the values in the raster as if it is converting from
feet to meters. My example raster where I see this has
georeferencing of EPSG:3521+6360 and is a 32-bit floating point
DEM. My use case would have more arguments to gdalwarp, but I
simplified to the minimum that showed the problem.
If I change the environment package list for conda to not specify
the pdal version, I'll get pdal version 2.4.3 and gdal version
3.6.2 and the raster will convert correctly.
I did note that in a setup where it converts the values, I see
this warning:
Warning 1: Unknown units=US survey foot
Kirk Waters, PhD
NOAA Office for Coastal Management
Applied Sciences Program
Phone: 843-284-6962 (New as of 2022)
coast.noaa.gov/digitalcoast
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