@Pedals2Paddles wrote:
From reading the guides on Terrain data, I completely understand how it decided what terrain data to request from the ground station. And I get that it stores it on the Pixhawk SD card. And that the Pixhawk pulls it from the SD card into memory as needed in flight. But I don't see documented anywhere is what happens after? Does that terrain data stay on the SD card forever? Stay until space is running low? Stay until the next terrain data request regardless of space? How much terrain data can it store on the SD card?
The reason I ask... I really like the ability to use terrain data. BUT, we don't always have the luxury of Mission Planner and the internet out in the field. I could cheat to load the terrain data at home first. Say by making a survey mission covering a huge area of my neighborhood. That would force the AP to request all that terrain data from MP, which would be uploaded to the SD card. But how long will that data last? When is it deleted if ever? etc etc.
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