We have received 2 DEMs for a project; one covers our entire county and has 6ft pixel resolution. The other only covers a major city, has irregular boundaries, and is 3ft pixel resolution. Since the 3ft DEM has irregular boundaries, there are areas of NoData within the DEM extents.
I have a few questions below since I don't work with rasters that often:
- What is the workflow to mosaic these 2 DEMs together?
- How do I have the 3ft DEM show on top of the 6ft DEM where applicable?...do I use ZOrder? Do I set the ZOrder on the primary rasters or overviews?
- Will having NoData values within the 3ft DEM extent cause an issue?...i.e., show as white space on top of the 6ft DEM?
- Our 6ft DEM does not show at all extents for some reason. When I am zoomed out to Full Extent, nothing is shown, why is that?
Any help would be greatly appreciated!