Map mission + WIND + Trees = Aaaarrggg...
Been trying to get a respectable Ortho image for some time but given the density of trees around the property I really wanted a reasonably calm wind day. But each time I got out there, the wind picked up. Almost like it was taunting me.
Finally got a fairly calm day and was able to come up with the below.
Question: How much difference would there be if flying a map mission with a "grid" as opposed to no grid? I assume more images = better resolution? But when it comes to windy conditions, it almost seems more images increases the effect of all those branches flapping around.
Here's the img:
https://byz.com/mhproperty/
Comments
10 comments
Hi Tim B, What drone you flying, what height and speed you flying at, what's the front & side overlap.
With my mini2 I generally fly a grid at 285ft AGL at max 20MPH with 80% front & side
Hi Martin you fly a grid at 285 AGL ain't that kind of high ?.I normally fly under 200 AGL.i thought the closer the better ?
Hi Victor, I've not found it high, its actually the default setting on the mapping component in dronelink, here's one of my orthos
https://map.openaerialmap.org/#/-2.185952067375183,53.16895180572086,17/user/634fce5e71072f000580f871/64c109ca3473010001ab8bc8?_k=e9o3zy
Oh ok looks good.i fly my Air 2s at 150-175 AGL.well depending where I'm flying
Hey Martin a inspection of a roof,of a 2 family home and a simple video of the old roof and after the roof is done with new shingles same thing some photos and a simple video.whats a fair price
glIf I'm looking at a 3D model as well, I'll re-fly at 185 AGL and -65 gimbal
Post it when you do I'll like to see it
Hi Martin-- Thanks for the response. This mission was at 250' with overlaps set to 75/70.
Of course when you're running a mission over flat ground with limited trees or over buildings, you don't have the kind of alignment issues you have when trying to combine images with trees flopping around in the wind and each consecutive image can be significantly different than it's neighboring images. Or I guess I should say to be more accurate, the images can align fine, but the tree branches can end up looking pretty weird.
In my case I needed to come up with a final image that can be posted directly on a website where viewers can zoom in and pan around. The image I posted actually consists of over 2,200 images in over 60 folders.
Tim, if its ok the images being public then check out either of these:
https://atlas.maphub.online/
https://map.openaerialmap.org/
I use both of them, here are some examples
https://atlas.maphub.online/?ll=53.16934%2C-2.19094&z=16&
https://map.openaerialmap.org/#/-2.1858255000000026,53.169182104938635,16/user/634fce5e71072f000580f871/664b1e0d49dd860001fae097?_k=q13yy8
Thanks for the info Martin.
Looking at both examples, it seems openaerialmap's results are much better than maphub's which has some obvious stitching issues. (?)
But the more tools one has available to use the better. I'll keep both in mind.
In my case the final image needed to be posted on a particular domain rather than any kind of hosted site.
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