In this module, I learned about isarithmic and flow line mapping. We were assigned to create an isarithmic map with contours. The subject of the map is the annual precipitation in inches in Washington state. This map was created in ArcGIS Pro. I created this map using data acquired from the USDA and created by PRISM. I adjusted the symbology of the raster file to use precipitation colors (dark blue to dark orange). This map includes 10 manually adjusted breaks, which can be seen in the legend. I then created contour lines that follow the same value breaks. I created a hillshade for this raster using the hillshade tool. I selected the DRA (Dynamic Range Adjustment) tool to adjust the hillshade to the local area. From here the raster layers were ready for a map layout, which I have included below.
I have created a portfolio of my GIS work and skills. You can find it here: https://emctalbert.wixsite.com/gisportfolio Part of the final assignment for this course is to record audio or video answering a few sample interview questions. My video is included below. Part 1: Part 2: Part 3: Part 4: Part 5: Part 6:
This week was the last module of the Special Topics course! We learned about scale and spatial data. Particularly about the different effects of scale on vector and raster data. With vector data, the scale affects the detail of the data. For example, at a larger scale vector data is much less detailed than the data would be at a smaller scale. The scale of raster data affects the resolution (cell size). A larger-scale raster (i.e. 90m cell size) is much less detailed than a smaller-scale raster (i.e. 2m cell size). The cell size will also affect the results of any spatial analysis completed, such as slope. Part of the assignment was to determine gerrymandering, which is the manipulating of electoral boundaries to benefit a particular political party. One way to determine it is by measuring the compactness with the Polsby-Popper score (Morgan and Evans 2018). This method creates a score from 0 to 1. In the assignment, I calculated the Polsby-Popper score for the congressional...
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