I've recently learned that, with correction signals from a base unit at a known nearby location, one can achieve inch-level accuracy with GPS(=GNSS) equipment, as surveyers do. I've also heard that such base unit equipment has become reasonably priced recently, especially for computer savvy DIYers. (I'm not quite computer savvy, though).
RTK is a correction factor format. RTK stands for https://en.wikipedia.org/wiki/Real_Time_Kinematic . As I understand it, base unit receiving satellite data at a accurately known position near a roving unit allows the use of base unit correction factors to correct nearby rover units positions, yielding centimeter-scale accuracy.
I could locate trees, boundary markers and such with these and bring the data into a GIS system like QGIS to create accurate maps rapidly, I hope.
Have any of you heard of or used such? I'm assessing a 2 acre home site and plan to be assessing some 25+- acres in the next few years, and hope to use such. I hope to have a base unit send correction signals over wifi to a rover, which might just be a cell phone with GPS capabilities and wifi.
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