Sounds like a combination of Stephen's aerial mapping approach and your GPS approach would work like a hot damn.
- Take your cheap GPS receivers out and gather an hours worth of data at two ground control points preferably on opposite sides of your property. Even better, take a couple GPS receivers out. Average everything out to get your "best known location for those two points". - Now take some aerial data (perhaps the USGS or the USDA aerials?) and affine it into place using your control point. - On-screen digitize the features of interest, and you're done. The aerials provide the relative positioning accuracy and the control points provide the absolute global positioning accuracy.
P. On 6-Aug-07, at 12:47 AM, Ben Discoe wrote:
Great! I've got several parcels of land, each several acres, with lots of features in them (fences, trees, buildings, etc.) I need to digitize the location of the boundaries and features, and some sloppiness is acceptable (1-2m) as this isn't legal or proper survey work. 3D surface height would be super, but i know that's impossible, so 2D points is fine. I'm happy to pay prosumer prices (<$1000) but the typical cost of pro gear (>$8000) is right out.
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