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Just created DTM and the elevations on the right are 4’ to 5’ higher and on the left side 4’ to 5’ lower than the GCP entered. Anjy ideas why. Thanks

Can you post the report?

Double check the quality of your ground control and make sure that the horizontal and vertical accuracy are correct.

If you have enough image overlap you can also clear your geotags because that might create noise if they are low quality.