I am trying to create a raster mosaic (in ArcGIS 10.1) as I am working with many asc files - I am trying to put all the different tiles together in order to run a view shed analysis. I have been told that the instead of adding one asc file at a time I could combine all into one by creating a raster mosaic, but the problem is when I do create a raster mosaic, it comes up as empty green squares. I have also calculated the statistics and built pyramids but they seem to have no impact.
I was wondering whether anyone could tell me how I can get the terrain to actually become visible as I am using elevation data. As always any information would me immensely appreciated!