Drone2Map Ortho mostrando alturas Z incorretas.

Anonymous User

Olá a todos,

Tenho um colega que tentou criar uma orto 2D de algumas imagens. Quando ele usa a função Rapid, os dados estão na altura Z correta. No entanto, quando ele usa a opção mais elaborada de orto 2D, e apenas utiliza as configurações padrão - sua orto e o mapa base estão subitamente 40 metros mais altos... 

Alguma ideia do porquê isso pode acontecer?

Bill_VS

If it was flown with a DJI drone, they tend to use the wrong datum for elevation, and can be off by more than 50m vertically. In Pix4Dmapper, I correct this by editing the imagery input table (the one with the EXIF values). I don't use Drone2Map, but I hear it was based on the Pix4D engine, so it might have a similar interface at the beginning of the orthorectification process. You can use a single value to approximate height, or If you want to get more accurate, you could take one ground shot before takeoff, and subtract the AGL elevation of that ground shot (should be 0) from all subsequent values. I've found the approximation method works just fine for my purposes, though.