Terrain data for showing AGL

[error414]

Hi,

I play with rangefinders, but rangefinders are expensive, inaccurately, or both.

Solution could be implement into inav terrain data saved on SD card similar to ardupilot. https://terrain.ardupilot.org . Precise for ardupilot is 30 or 10m, it's not enought for mountains, so would be nice to implement 1m precission from GeoTiff as well, lot of countries provide data for free.

At start AGL can be showed only in OSD, no any automations.

https://discuss.ardupilot.org/uploads/default/original/3X/5/e/5e1711b608419ec2c58a96824a0c281168ebe38d.png

[b14ckyy]

Some day in the future, when we have a SD card driver that is capable of reading and writing blackbox, maybe. And yes I am all down for that :)
Especially as it would come in handy for a 8.0 feature thats in the works.