Wednesday, September 24, 2025

Module 4 - Surfaces - TINs and DEMs

 In this lab, we were tasked with creating 3D visualizations of elevation models, creating and modifying a TIN using various datasets, and then comparing a TIN and DEM elevation model to each other based on their properties and derivatives. Another aspect of this lab was to explore contour creation utilizing a TIN and DEM. When creating contours with a TIN, the contours appear more angular, allowing for a straight-line-like contour that gives a uniform look. The DEM contours gave a more natural appearance. The contours appeared to conform to the natural terrain and showcase a downward slope, whereas the TIN contours did not. The reason the DEM contours appear as such is that the DEM is made up of uniform grid cells that store elevation data. The more cells you have, the more detail the DEM, which allows for more precise contours.

Here are the two different elevation models:

DEM


TIN



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Module 6 - Scale Effect and Spatial Data Aggregation

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