Le portail francophone de la géomatique

il semble qu il y ait differents types de Geotiff.
Chez moi, les geotiff se composent en fait de deux fichiers :
un tiff et un fichier .tfw, ouvrable/modifiable dans n importe quel
editeur de text, et qui contient le georeferencement.

Sans doute faudrait il creer un fichier .tfw pour regler ton probleme.

voici la reponse proposee a un pb similaire au tien, trouvee sur un
autre forum :
(http://mapserver.gis.umn.edu/data2/wilm … 00465.html)

> This happens because photoshop doesn't support GeoTIFF images. When
> you open the GeoTIFF image in Photoshop and then save it again, you
lose
> the georeferencing. What you can do to fix it is create what's
called a
> world file. This is a small text file with the following lines :
> 0.00473306
> 0.0
> 0.0
> -0.00473306
> -97.3743368
> 49.415919

> line 1 represents the X dimension of your pixel (in map units)
> line 4 is the negative Y dimension of your pixel (it has to be
negative)
> line 5 is the upper left X coordinate of the image
> line 6 is the upper left Y coordinate of the image

> If you copy these lines to a text editor and save the file [with
identical name .tfw ] in the same directory where you have
> your tiff image, your map should then work.

bon courage

stephane
http://www.gueritte.plus.com