Module 4 - TINs and DEMs

    This week, in the fourth Special Topics in Geographic Science lab, was about TINs and DEMs with concerns to surfaces.  

    In this lab, we focused mainly on preforming correct analysis of layers onto a 3D spaces, as well as the visualization of the data they can provide. An example of this can be seen below, as after viewing and exploring TINs on a terrain surface, we then made a suitability map for ski runs. This involved a lot of process in changing our raster to a TIN, Slope, and Aspect, before reclassifying them all and putting them together. In doing so, we gave the inclines their own value in order to then show the steeper the slope the more suitable it would be for skiing.

    After doing that, we then explored and made our own TINs. This was a helpful application as the symbology for TINs is very mailable, with points, aspect, edges, and slope. This was immensely helpful as what we did earlier with spatial analysis could also be done to a TIN. Below is an image from the TIN I had messed around with.

    Lastly, we then compared the contours between the symbology made TIN ones and the DEM made ones. This was a good comparison as they were both similar but we could see the TIN had an index line, while the DEM one was its own file and easier to hide or change if need be.

    Overall this was another great lab and provided even more useful knowledge on the 3D aspect of ArcGIS.

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