This is not as difficult as one might think it would be.
First and most simple approach, first determine the exact heading by creating two placemarks in Google Earth and determining the heading of the angle between them.
You could then generate a path in KML format of the path - that will be the border.. Keep that handy..
there are several things you could do.. Some dont even require a GPS.. Simplest would be to set off on foot following the heading until you get to the other end, either unrolling a string or tying markers to trees or both..
Using a good compass, keep going until you find a tree at exactly the right spot, - continue marking trees with colored pieces of cloth in a high visibility color either when you hit a tree at the exact spot or when you're about to lose visibility make some kind of marker using a stick and cloth, keep going until you get to the end.
As somebody who has done this a few times, I suspect that as you are doing this you will likely find markers from previous surveys - even if they were done some time ago, once you are there and your exact location is informed by the other methods.
When you get to the other marker, if the path determination has been fairly successful you'll be able to tell by how close you are at the end. Then go back and check your work with a GPS and if it seems appropriate, improve the marker locations.
Really dense trees make it hard to get it right but keep in mind that if you have a good GPS which doesnt need to be at all expensive.. if the GPS is configured correctly, the longer you let the GPS sit still, the better the measurement will become..
If you take your time, you would be surprised how well you could do under slightly less dense trees with some warm up time (a few hours, maybe as you are doing other stuff elsewhere, just leave your GPSs both on and connected to antennas).
If you use RTK, you'll likely with some practice be able to get much more accuracy, (just a few centimeters - without a fancy surveying grade GPS antenna) depending on how thick the trees are and how long you are willing to wait to have the solution home in on the right number..
Try some of the links you get back from this search and the other URLS
https://www.google.com/search?hl=en&as_q=idaho+cors+network
Hello,
Been thinking about how one could mark (flags, posts, whatever) property lines through hilly terrain or dense forest where line-of-site isn't possible. The property corners are known and marked, but you cannot see from one to the other.
....
No doubt they have equipment that can do this, but it'll cost a ridiculous amount. Besides, something like this has got to be really easy to make with junk parts, it's just getting the right antenna setup that must be the important part for the above stated accuracy.
Any recommendations? Point me in the right direction (no pun intended).
Thanks,
IM
You may not even need centimeter level accuracy (thats what you get from RTK.)
Newer
Multi-constellation consumer grade GPS hardware IF CONFIGURED PROPERLY and
given a few hours to warm up (it can be traveling that time) can be a lot more accurate than many people think it is. In the open, within just a few meters or even better.
You say you know the exact position of the markers? If so, you can leverage that info to make your relative measurements much more accurate. get two identical cheap GPSs and as somebody else said, keep one at your known reference point and bring the other one with you. Record the data from both the stationary location and the moving one.
You then can diff the movements in the known stationary receiver's track from the other track too to get substantially better accuracy.
You would be surprised how good modern GPSs are.. even without RTK or DGPS.. read this article about the improvements from adding additional GNSS systems.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4321187/I'm kind of distracted right now by a totally unrelated issue so this and my other posts may seem a little scattered but I would be happy to walk you through this try to answer your questions or point you to where you could get expert help (much more so than me!)