Some general questions regarding terrain following in QGroundControl.
First off, we are pre-planning missions in the office, selecting vehicle follows terrain, and then heading to the field. We are getting an error once in the field regarding terrain following. We have to de-select that option to continue. I am assuming this is because we do not have internet, and therefore QGC is unable to download, " Terrain following uses terrain heights queried from AirMap servers".
Is the cellular/network connection problem the source of this error?
Is there a way to download the terrain data in the office in advance?
Secondly once we are able to enable terrain following, I’m curious in regards to the nature of the terrain following.
Does a single flight line simply follow a straight line (elevation) from a waypoint on one side of the line to the other?
Or, does the UAS follow the terrain data along a single flight line continuously altering its elevation up and down in relation to the terrain model?