[gdal-dev] Bad values when reading GCPs from a VRT file with gdalinfo in GDAL 3.8.3

[Rahkonen Jukka]

Hi,

Out of curiosity, what is the purpose of using inf or -inf as values? Is it to use them as placeholders telling that you do not know yet what the georeferenced coordinates of the ground control points are?

-Jukka Rahkonen-

Lähettäjä: gdal-dev <gdal-dev-bounces at lists.osgeo.org> Puolesta Pierluigi Guasqui via gdal-dev
Lähetetty: torstai 25. tammikuuta 2024 13.34
Vastaanottaja: gdal-dev at lists.osgeo.org
Aihe: [gdal-dev] Bad values when reading GCPs from a VRT file with gdalinfo in GDAL 3.8.3

Dear GDAL team,

I am using GDAL version 3.8.3 and I am trying to extract GCPs values with gdalinfo tool from a VRT file (attached).

As you can see by looking at the VRT file with a text editor GCP XYZ values are infinite values. When I read GCPs from the attached VRT file with gdalinfo (latest version GDAL v. 3.8.3) I am getting all zeros:

GCP[  0]: Id=0, Info=
          (0,0) -> (0,0,0)

Instead, if I use gdalinfo (GDAL v. 3.6.3) I am getting the correct values:

GCP[  0]: Id=0, Info=
          (0,0) -> (inf,inf,-inf)

Is this a bug with GDAL 3.8.3?

Thank you for your help!

--
Pierluigi Guasqui
Software Engineer

Applied Coherent Technology Corporation (ACT)
www.actgate.com<http://www.actgate.com/>
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