I have been processing large scale Images along with DTM, DSM and Contours.(Aprox 1,000,000 M²) many have been proceed with a satisfactory result.
But my last product produce a very noticeable difference between the DTM and the Contours, i asked fro help to a GIS expert and he told me some GCP were too close and different Altitude and might cause the software (PIX4D) to get confused.
Is this somewhat true? Does close GCP at different altitude might confuse a Mapping software?
I had the understanding that GCP are absolute, and they are tied to the exact Point they are pointed, not matter how close each other they are.
My principal goal to have close point at different altitude was to help the software differentiate the changes on elevation.
I would like the support of the software’s Devs and more understanding(than me of course) people, on Mapping/Geo-processing.
Thanks you very much in advance.