Can I improve this map?

I there a way to improve this map at all? Happy to pay for processing fees again but seems overlaps were not sufficient at 50%.

https://www.mapsmadeeasy.com/maps/public/2249e3df7e4f44d2bda6c4aa973cc35b

Edward Coxwell-Rogers June 20, 2025 12:08

Official comment

You have a lot of things working against you here. The overlap is just barely over 50% which is not good. This will give you 4X coverage on everything in the scene. You want at least 16X coverage for it to turn out well repeatably. This means using at least 75% overlap as noted in the Data Collection guidelines that are agreed to at the time of upload.

The other issue is the really strong sunspot in the images. You can see it in the Flat Map Failover part of the image. It is actually almost a textbook case for when to use the Flat Map: you don't have a lot of overlap and the images are not great. It was still able to give you an output.

To make it better just use 75% overlap. I know this will require quite a few more images but it will give you the result you are looking for. The GSD of this map is .7 cm/pixel which is pretty small. If you don't need that level of detail you can fly a bit higher and using the right overlap will take less images.

We appreciate your checking in to ask for feedback publicly. Hopefully others can learn from our response.

Zane June 20, 2025 13:46

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3 comments

Thanks for your help, it was a difficult situation to be in as I was flying in a heavily restricted FRZ so was limited to tree height (25m) and only had permission for a 30mins flight time as I was directly under the approach corridor which is why I reduced the overlap to fit within that time window.

If I was to retry this mission MPP estimates a flight time of 1:06hr and 1,705 photographs at 25m with an overlap of 75%/75%. Unfortunately I don't have the Ground Reference Images any longer so can't initiate a Flat Map.

To reduce sunspot images, do you have any advice? I'm guessing flying any mission in direct sunlight is going to limit my success!

Edward Coxwell-Rogers June 20, 2025 14:12 0 votes

That is certainly a difficult data collection environment. In that case you could use a downscaling option so you don't have to pay to process more pixels than you actually need.

You basically already ran it as a Flat Map so running it again won't make a difference with what you already have.

Usually you don't have to worry about sunspots unless you are within 2 hours of solar noon for your location. This was within that. When dealing with vegetation it is actually really reflective so you might want to get a polarizing filter for your camera which will cut that back reflection.

Zane June 20, 2025 15:29 0 votes