missing spatial reference (raster)

Discussion created by robbe-robin on Jun 21, 2012
Latest reply on Jun 21, 2012 by robbe-robin

I have some problems with a raster-file and its spatial reference. The file has no spatial reference, changing the projection by map-properties or ArcCatalog doesnt work. Additional I have an auxiliary data set with a raster which has spatial references.
Is it possible to join/merge the raster without spatial references to the other one?

Data source: (maybe someone had the same problems already)