cesium update to 1.61 and terrain API change to fix broken terrain in master

[davidbuzz]

On Current Master, the terrain data is broken because the old agi.com terrain server/s are no longer available, and you now have to use the cesium-ion servers, which are free for non-commercial use so long as you have a provider token, one of which I've got for free and included in this commit.

[Ryanf55]

Hi Buzz,

Any chance you could help me run this branch? I tried, but it still didn't resolve the issue.

I really like this tool, and am considering taking ownership to achieve

• Get it working with latest ardupilot SITL
• Abstract away mavproxy enough that we can start to use roslibjs as an alternative messaging
• Support viewing ardupilot geofences

[davidbuzz]

you realise how long ago I opend this PR, right.? I went through a CesiumJS phase, and its still a great tool, but I haven't used it in years. https://sandcastle.cesium.com/ is a great online learning reasource that lets u edit cesium in the cloud and try it out.

[Ryanf55]

Yep! I'm grave digging here a bit, but am really impressed with this interface. Are there any 3D alternatives that you are aware of that work with ArduPilot that also support terrain, sensor frustrum visualization, waypoints?

[davidbuzz]

The only other 3d one i'm aware of is https://plot.ardupilot.org/#/, but its a 3d log viewer not a 3d GCS

[Ryanf55]

Tested this branch:

Gonna try a newer version.

[davidbuzz]

u needed to uninstall the pip-installed mavproxy first, becasue app/cesium_web_server.py , lines 24,25,26 read the "web server root" from the python site folder, not the current directory, and only fall-back to the current directory on lines 28,29,30.

[Ryanf55]

I got it working on my branch 2024-refresh and merged to my master.
I've proposed a new PR here: #47

This one is no longer needed.