GCP Targets
- Thread starter JOECNC2006
- Start date
CDs?? You must be flying very, very low.
Here are some I made by cutting up some old cardboard packaging.
CDs?? You must be flying very, very low.
Here are some I made by cutting up some old cardboard packaging.
Are those 24"x24"?
Maybe ... (or even a bit bigger).
They were just the biggest size I could get out of some large cardboard packaging.
Dave Pitman
Well-Known Member
cd size targets can work for low-level projects. My projects usually require 180 - 300'. I6" targets are my go-to with 24" available if needed. I get 18 targets out of a 4x8 sheet of 3/16" plywood (18$ at big box). Stiff enough to be able to place a rock on a corner if needed when breezy.
Aerial Edge
Well-Known Member
I have a Vinyl Plotter and a heat press. Bought it for my business stuff and the wife has turned it into her own little business. I ordered some black Vinyl and some reflective orange. I was thinking about making some ground control points. Now if you do not have Centimeter GPS to get GCP locations is it worth having GCP?
I guess I can see where getting contracted by people with surveying equipment it could be a great thing to have. Maybe some here can fill me in on that. I have limited experience mapping, but have done some Orthomosaics using Agrisoft Metashape.
Dave
I guess I can see where getting contracted by people with surveying equipment it could be a great thing to have. Maybe some here can fill me in on that. I have limited experience mapping, but have done some Orthomosaics using Agrisoft Metashape.
Dave
You have to collect the exact X/Y/Z of the GCP's to have acurate Orthorectified images with out them you are just generatting a picture which is not to scale and not an orthorectified image. We use Trimble R6 units right now and in my Ortho image I an within 0.05' to 0.1' when I import the Image into civil3D and measure from know collected points such as curbing and other physical features which my crew had collected with GPS equipment. And on hard surfaces the Z is within about 0.0' to 0.15' and grass areas a little higher in some places.
But then again it depends on what your mission objective is.
But then again it depends on what your mission objective is.
We use A4 coated targets, but for resting targets, that shall be available for more days, we use numbered crosses made with yellow paint cans. This yellow paint vanishes in a couple of weeks.
