This week we played with various types of and ways to visualize surface elevation data. We looked at TINs and DEMs, creating models and contour lines as well as playing with symbology settings. This is the first time I've encountered TINs but they are oddly familiar to me after doing so much work in 3D modeling. It's interesting that they are still treated as 2D data, though you can use them as your elevation source within the scene.
One of the tasks was to create a suitability model for ski runs from a DEM. This allowed us to explore the various aspects of surface data including elevation, slope and aspect. We learned about the weighted overlays in the Applications class so I was very happy to revisit this process, now with added 3D visualization!
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| Areas of darker green are more suitable for skiing! |
We also created a TIN and DEM from a layer of point data. From this, we visualized the results with contour lines and compared the two sets of data. While the DEM is much more pleasing to look at, the TINs have less extrapolation and are in theory more accurate.
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