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IMHO, you're probably overdoing it. Any GPS will collect an ok trace, and if you collect one on your phone at the same time, you have a second for reference. If you can borrow another from someone else, even better. Now load the traces over some satellite imagery (Google Earth, Mapbox or other), and you'll have plenty of confidence that your traces are ...


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Your question is far too broad to cover in the GIS.SE Q&A format. It sounds like you're at square one with little to no previous knowledge or experience. This is fine, everyone has to start somewhere. But if you really want to learn the proper methodolgy, you're going to need to do some research into all the various steps, even just to get an overview of ...


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I would take a step back and ask is my GPS capable of making a DEM. The answer to this question for most consumer grade units is unfortunately no, well not without quite some work before you start interpolating etc. The vertical error in GPS can be very large even with modern units. What you are measuring is also an issue, see below. "A brief examination ...


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starting from points to build a continuous surface is called spatial interpolation. You can find information about those methods on the Web. Surfaces can be represented using wo different models : raster or TIN. Most existing DEMs use the raster model, but TIN is sometimes a good alternative. As its names says, TIN are composed of irregular triangles, ...



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