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In Ortho Mapping, when adding Ground Control Points from a reference raster

Question asked by Mikeb@grrenvalleys.org on Jul 11, 2018

When adding GCPs (using a reference map), where is the GCP Manager getting the z values?  Can I supply a different elevation source (DEM) or edit each GCP's z value somewhere?   The values it is finding are close, but not close enough.

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