No terrain data (for Finland?)

[sgofferj]

Expected Behavior

QGC should get terrain data and send it to the MAV

Current Behavior

QGC says "Plan is waiting on terrain data from server for correct altitude values".
Console is full of "Error in fetching elevation tile. Empty response."

Steps to Reproduce:

Please provide an unambiguous set of steps to reproduce the current behavior

1. Plan a mission with altitude over terrain
2. Location: N61.2556694, E24.0564945
3. Try to upload

System Information

When posting bug reports, include the following information

• Operating System: Ubuntu 18.04
• QGC Version: 3.5.1
• QGC build: stable
• Flight Controller: Pixhawk
• Autopilot (with version): Ardupilot Copter 3.6.8

Detailed Description

I checked through the source and found that terrain data seems to be downloaded from airmap.com. My guess would be that a US company does not have elevation data for everywhere in the world. Suggestion: use public worldwide SRTM data at least as fallback and/or allow the user to manually copy .hgt files to a folder.

Log Files and Screenshots

• QGC Console Logs
• Autopilot logs when available (post a link).
• Screenshots of QGC to help identify the current issue/bug behavior.

[DonLakeFlyer]

Can you attach a Plan file for the area without using terrain?

[sgofferj]

plan.zip

[berserk84]

I have the same problem in Norway.
But I see on page:
https://developers.airmap.com/docs/elevation-api
that airmap elevation API is not supporting "extreme" latitudes:

Elevation Dataset Limitations
The elevation dataset for this API is limited to latitudes from 56ºS to 60ºN

So it would be a nice feature to be able to use different elevation data source than airmap.com