Twirlip
lvl.4
Flight distance : 2461545 ft
United States
Offline
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I don't actually *know* the answer, but I can guess. I assume that you view them in the same place you view maps normally: i.e. in the little "map view" when you're flying the drone, and also in the replay when you're reviewing your flight log.
Bear in mind that normally when you view maps on a device like, say, a phone, the maps aren't really stored permanently or reliably on the device itself. Mostly they live in the cloud, and the device is continuously connected to the internet (either via Wi-Fi or, if it's a phone, via the cell network), and whenever you zoom or pan around, the device just goes to the network on the fly and pulls down whatever map grids it needs whenever it needs them.
That works great if you're actually network-connected... but what if there's no connection? For example, I've got a CrystalSky, which is an Android device that's Wi-Fi capable but has no cell phone connection. So the moment I leave the hotspot around my house, if I'm off hiking up the side of a mountain or something, I'm not going to be able to pull in maps.
So, what I *assume* the downloaded maps are for is, they give you the entire country (or state, or whatever), in full detail, saved to a place that they're guaranteed to stay until/unless you manually delete them (i.e. not in a volatile cache that could get dumped automatically), thus guaranteeing that you have at least street maps no matter where you are.
Like I said, that's just a guess. I'm essentially reverse-engineering how *I* would have built it if I were designing the system myself. :-) (Not totally blue-skying, there, I'm a software engineer with a background in mapping software.)
No idea if that's actually what it's about or not, but it seems plausible to me. I went flying today in a place that didn't have Wi-Fi coverage, and I can attest that it had street maps available, and I did in fact download the map for my state yesterday.
Perhaps someone who, unlike me, isn't a total DJI GO 4 noob could weigh in... |
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