RTK drone mapping problems

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    Blossoming 3Dflower
    • Apr 2024
    • 1

    RTK drone mapping problems

    Hi,

    I have been using 3DF zephyr for a little while now for mostly drone mapping but I just noticed some problems regarding georeferencing recently. I use the drone RTK receiver a lot, which saves me time setting up GCPs

    1. if I convert CRS to the one I'm using (NAD83 (2011) South Dakota state plane N) in zephyr, and export an ortho to arcgis, the ortho sits in the the pacific ocean, just off the Ecuador coast. How do I get it to show up in the correct location? Well at least close to where it should be.

    2. The default CRS in zephyr is WGS84/UTM 14N in my case, but when I export a 3D mesh to arcgis, and set the coordinate system as the same, the 3d model shows about 1-3 meters of difference from our GIS location. I then tried NAD83 UTM 14N and it was much closer to the GIS location, with about half a meter difference, which can be attributed to digitizing error. I usually just generate orthophotos and adding the orthos without defining projection just places the orthos where they should be.

    What could be the cause of these problem and how do I fix them? Thanks. I usually fly with a DJI Mavic 3 enterprise drone with the RTK attachment.

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