I've always used 3'x3' vinyl targets. They work great, I havent had a chance to try them yet but I can get the Propeller GPS embedded targets which look pretty awesome, although a bit costly.
I'd be interested to know how users have found the Propeller system to work. The system seems to be based on the theory of getting a decent result from a number of less accurate observation sets. While this probably works most of the time, what happens when the geometry is poor? I also wonder about how good the sky view is when these boards are sat on the ground (unless you are out in the desert). This surely limits their use on some sites - a system is only useful if you KNOW it will work before you arrive on site.
Any answers?
I just purchased these?ÿ24"x36"?ÿendura-cor plastic sheets.?ÿ I plan to cut them into 8" widths and put them in a "+" shape with a nail & washer in the middle.?ÿ I will need to remove them once the aerial work is done.?ÿ Hopefully I can reuse them on another job.
Here's a "drone's eye" view of our lath target, cropped from the full size image, using an eBee flying at 385 ft AGL.
I'd be interested to know how users have found the Propeller system to work. The system seems to be based on the theory of getting a decent result from a number of less accurate observation sets. While this probably works most of the time, what happens when the geometry is poor? I also wonder about how good the sky view is when these boards are sat on the ground (unless you are out in the desert). This surely limits their use on some sites - a system is only useful if you KNOW it will work before you arrive on site.
Any answers?
So the propeller system will work with RTK corrections from propellers network service or get corrections from a local base. Seems pretty interesting, I want to try and get ahold of a set and do some tests.
Here is our first attempt. Target on the ground with rod driven in the middle. 24" x 24"
Thanks for the photo Rick.
Here is what we made in use
We have used white 5 gallon bucket lids with two opposite quarters painted black.?ÿ I have not heard of any problems seeing them from the UAS software.
Saw these in Bunnings today. $1.60
300mm square. Probably come in other colours. Sticky backed vinyl.?ÿ
These would be ideal and dirt cheap.?ÿ
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...... $1.60....300mm square.
I'll save "you all" the trouble of looking it up. That's about $1.20 apiece and 1 foot square in 'murikin.
3D printed targets,?ÿfold for easy carry and should last for many uses.
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Lee, it's not obvious to me how those fold.?ÿ
I'm guessing there's a hole in the center so they can be positioned over a more permanent monument.
I'm out of my experience range here ... Would thick legs cause shadows that make it hard to accurately find center in the photo?
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I don't know, as they are not my targets. I noticed this in the web and thought it might be a good idea.?ÿ
Myself, I have found that a can of paint for targets on pavement and commercial?ÿ 3'x3' iron cross targets work just fine. I can't see how you guys can find those small 1'x1' targets from 200' on large projects. You must fly much lower.
