Altitude measerment difference.

acvdmolen

The GPS Test APP give me the right value/altitude while duduos give much to high value/altitude?
There is a lot difference between both where does is go wrong because the value of the GPS Test APP is allmost right and DUDUOS around 44 meters to high.

Chubaka885

acvdmolen укажите пожалуйста скриншот с версией системы. Как это сделать описано здесь https://forum.dudu-auto.com/d/14-how-to-give-correct-feedback-on-bugs

surfer63

Good GPS programs use one of the "DEM elevation data" databases to correct for elevation errors. Google Earth (not Maps) always offers to correct this. OsmAnd also uses the "elevation correction" database (optional download).
I assume the GPS Test app is also using the "elevation correction" database. Compressed it is only ~ 1,6MB (and we all know that an apk is simply a special zip structure).

So I guess that DuDuOS should start using DEM data. There are multiple databases (OpenDEM, Copernicus, etcetera)

DEM = Digital Elevation Model