We employ the use of active GCP's, which collect satellite data over time and then store that data. That data is used to make maps accurate to within 1/10". For the larger jobs, we chose a GSD of 1"/pixel because the bird flies 20+ mph at 300' AGL...which makes for an efficient day. So if you're having accuracy issues with your photogrammetry, I suggest using more GCP's or perhaps the active GCP's we use. All our maps are architectural grade.
All that said, we started using LIDAR about a month ago, but the working speed of 10 mph makes it impractical for larger swaths of land.
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One flight? LOL...not even close. Dozens of flights over roughly seven non-consecutive days. Here are just a few...
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I don't work for developers...at least for mapping. For mapping, I subcontract out to a survey company. When I work for developers, I do construction progress videos...again, subcontracted.
All small plots that can be done in < hour.
I just quietly do my job and nobody gets hurt. No property gets damaged. The client is happy with my work. I spend more time flying than I do advocating. I'll let the guys with more time than money wave the FAA flags, have meetings, chat with the news, stand on a soapbox, etc. I fly beyond VLOS because I have to.
Notice there are 6 launch points (Base Operations). If I had to fly VLOS, there would be 10x that many launch points. We'd spend more time driving than flying. And note the terrain. There's like 3 roads. Some of these launch points could only be reached via ATV utility vehicle. The lowest to highest points spanned 850' of elevation. In a word, ROUGH terrain.
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Here's a mission spreadsheet I made before the client added another 200 acres at the end (change order not listed in spreadsheet).
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Then for the love of all that is holy, either tell him to share some **** data with their "support" staff or start a enterprise support division for those of us power users who have questions that go beyond "How do I stop the props????" SOME of us get under the hood of these things. Not all of us are slaves to DJI's "policies" and limitations. Some of us have to make a living and can't login to take a test or agree to an updated EULA every time we go out on site. A little information from DJI would save a LOT of hacking.
And give him Kudos for the government versions of their software. It's a START. Looks like DJI finally woke the f*** up and realized that all this micro-management was hurting their bottom line. They basically made my hacked versions of their software available to government entities.
Thank you for your service.