Import GIS raster into Unity as terrain

Hello guys,
i have a geotiff or tiff file in GIS environment with elevation points and i need to import it into Unity3d as terrain.
I tried with blender using an addon without success.

Any ideas about the process to convert a raster into 3d model?

Thanks,
Matrox

Paint Shop Pro CS6 and Gimp(?) can import TIFF, convert your tiff to an 8 or 16 bit RAW file( if your tiff file has colour information convert to grey scale first)
and import the data into Unity

work flow Unity->FileMenu->GameObject->CreateOther->Terrain

LeftClick Terrain on the HierachyTab

look at InspectorTab look for TerrainScript then LeftClick settings icon (cog/gear)

ScrollDown and look for import raw button.

This answer is brief but should point you in the right direction I hope,

and asking more questions :).

Also look at VTBuilder and Wilburx64 both good free gis tools

http://vterrain.org/Doc/VTBuilder/overview.html

http://www.ridgenet.net/~jslayton/wilbur.html

You can use GDAL to convert from many different spatial file formats to a raw height map suitable for importing into Unity terrain. Importing DEM Terrain Heightmaps for Unity using GDAL | Alastair Aitchison