[gdal-dev] gif gfw and prj

[Rahkonen Jukka]

Hi,

I made a quick test with some random .gif file from my computer and your world file and those two do find each other without problems. The format of a_datum.prj is not familiar to me. Maybe it is Global Mapper specific. Maybe you can just delete it and use the EPSG:32632 code instead in gdal_translate as -a_srs EPSG:32632.

gdalinfo gif.gif
Driver: BIGGIF/Graphics Interchange Format (.gif)
Files: gif.gif
       gif.gfw
Size is 12000, 12000
Origin = (243987.500000000000000,5120012.500000000000000)
Pixel Size = (25.000000000000000,-25.000000000000000)
Image Structure Metadata:
  INTERLACED=NO
Corner Coordinates:
Upper Left  (  243987.500, 5120012.500)
Lower Left  (  243987.500, 4820012.500)
Upper Right (  543987.500, 5120012.500)
Lower Right (  543987.500, 4820012.500)
Center      (  393987.500, 4970012.500)

-Jukka Rahkonen-

-----Alkuperäinen viesti-----
Lähettäjä: gdal-dev <gdal-dev-bounces at lists.osgeo.org> Puolesta mauge.philippe--- via gdal-dev
Lähetetty: tiistai 31. lokakuuta 2023 11.19
Vastaanottaja: gdal-dev at lists.osgeo.org
Aihe: [gdal-dev] gif gfw and prj

Hi,
I have a gif file named img_5120000_244000.gif 

with a world file named img_5120000_244000.gfw that contains  :

25.000000
0.000000
0.000000
-25.000000
244000.000000
5120000.000000

and a prj file named a_datum.prj that contains :

Projection     UTM
Datum          WGS84
Zunits         NO
Units          METERS
Zone           32
Xshift         0.000000
Yshift         0.000000
Parameters

The 3 files are in the same folder.

When I open the gif file with GDAL using GDALOpen, GDAL doesn't read the gfw and the prj files and there is no projection.
Is there a way to say to GDAL to read the gfw and the prj files ?

I have successfully loaded the file with Global Mapper that read the gfw and the prj files.

The gif file can be uploaded at :
[link removed]

If you have any clue, please let me know.

Have a good day

Philippe
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