I have to combine several DEM rasters into one from this source: http://srtm.csi.cgiar.org/SELECTION/inputCoord.asp, so I use Mosaic to New Raster tool.
I set up the tool:
- I input the rasters (all from the same source, same size and no projection);
- Set up the Pixel Type (32 bit floating point as in the original rasters);
- Set up the Cell size as the original rasters;
- Number of Bands = 1 as the original rasters; Mosaic Operator, I have done it with BLEND and MEAN (I get the same result).
The problem I have is that the resultant mosaic shows a different range of maximum and minimum values than the maximum and minimum values of the individual raster e.g., raster 1 (-5123.8, 23.25), raster 2 (-5974.6, 40.09), raster 3 (-57770.2, 38), raster 4 (-2534.3, 23.55), and final mosaic raster (-5975.8, 81.1).
I guess this solution is not right, at least I didn't expect to get that. Anybody has an idea if this is ok, and if this is not, how to solve it and get a proper mosaic raster with right maximum and minimum values?
I am using ArcGIS 10.2.2 for Desktop.