Today I created used GIS Pro for the first time in GIS 5050. I created a crude map of the world. I had trouble trying to fit the entire boundaries into the layout so the very left and right margins got cut off. I expect to learn this task sometime later in the course.
Surfaces: TINs and DEMs
In this week’s lab, we learned about the use of surfaces in GIS, specifically creating, editing, and analyzing TINs and DEMs. Through the assignment, I was able to create 3D visualizations of elevation models, use various input data sets to create and modify TINs, and compare the properties and derivatives of TIN and DEM elevation models. TIN is abbreviated for triangulated irregular network; it is one model that is used to represent surfaces including elevations, through a combination of point, line, and area features (Boldstad and Manson 2022:40). DEM refers to digital elevation model or digital terrain model (DTM) and it is commonly used for terrain analysis (2022:66). TINs are essentially a DEM but in the form of vector-based data whereas other DEMs can be derived through a raster grid. One of the drawbacks of TINs, however, is that they are less widely available than raster surface models, and tend to be more expensive to build and process because of the complex data structure.
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