I have an Orthomosaic and a DEM (both are in Geotiff formats and have RGB values) of a site, and I want to check their accuracy. For this purpose, I measured the 3D location (with mm accuracy) of some fixed features on-site with a total station. For accuracy comparison, I need the 3D coordinates of those fixed features from the orthomosaic (X,Y) and the DEM (Z).
I'm using ArcMap 10.1, and so far, the only way I could extract the above mentioned information is by placing the cursor on each feature and manually read the (X,Y) coordinates from status bar.
I have over 400 features to compare and manual reading of the coordinates takes a lot of time.
1) Is there a way that I could use click and save (or similar automated procedure) to obtain the (X, Y) coordinates from orthomosaic.
2) Also, I want to extract the Z coordinates from the DEM for a set of (X,Y) values. Is there an automated sampling procedure for this in ArcMap?
Note: I have the licenses for most 3D tools in ArcGIS including 3D analyst.