Your assistance in resolving this is appreciated. Processed a map with GCP’s and CP’s. The GCPs and CPs were completed in the same workflow, same rover (Emlid Reach RX). GCP RMSE is as expected, CPs are completely scattered, even though they were done by the same individual and tagged by the same person. Can you help sort this out?
Even after tagging several times - quite accurately, the resulting ortho does not show the CP’s where they should be. Here’s some screen shots -
The intersection of the “X” is the proper location. The processed map placed them in a completely different location.
Where they were tagged - the corner of the storm drain grate.
DMF
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Michael, thanks for jumping in on this. The RMSE for GCPs is 0.51". The CP RMSE is 4.93". They were captured within the same workflow, immediately after the GCP collection. My interpretation of the issue is DD’s AI is ignoring where I tag the CPs and using the ground targets to factor what it thinks the geolocation is. The ground targets were not used in the typical manner - a permanent geographic landmark was used adjacent to the ground target. Examples - the corner of a storm drain grate, the corner of a grave marker, etc. The ground target was only placed so the aerial image could identify the general area, then tag the actual CP. This method was used in the event the RX had issues (which has occurred in the past) and we could return and identify the location once the ground targets were removed (also took ground images of the precise pole placement).
Corrections were from an NTRIP base just a few miles away. Attached is the detailed export.
I’ll reply again with the Map report RMSE pages.
