I am working on a new property where we will need a home and several buildings. Detailed Topo Elevation data seems hard to find as the area is rather rural.
Having built a spreadsheet of test XYZ data and importing that into CA/Home Designer worked quite quickly to produce a terrain surface. Since that worked well, I would like to take a handheld GPS and walk the property and develop a elevation point grid to have a relatively accurate terrain model to design on. The elevation over the property likely varies about 100 feet. An minimum accuracy of within 5 feet would work for this project.
I would be interested to hear from users that have tried using GPS points to build terrain models and get any info as to how well it worked. Possibly what GPS units were used as well.
I would really appreciate any suggestions and advice about how to gear up for this so as to avoid reinventing the wheel :^)
I have had success with this gps data using this website. http://www.geoplaner.com/
Type in your address or cordinates, start adding waypoints around your property and export in .gpx to import into chief.
It works really well, at least did for me.