I have used geographic information systems (GIS) in both personal and professional capacities.
At Delaware State Parks, I use GIS to build maps of campsite occupancy and desirability by site, campsite attributes, and park visitor home regions (ZIP codes, states, and regions). At the Delaware Office of Highway Safety, I made maps showing clusters of crash locations by road (including using Delaware Department of Transportation road network files to better consolidate and visualize the data), geocoded home locations of those involved in crashes, as well as more detailed maps for more specific data requests.
To satisfy my own curiosity, I've developed many other maps, including a comparison of different locations in Delaware and their distance from Philadelphia as compared to Baltimore and Washington and an analysis of the relationship between an area's distance from a major airport as compared to its income. I've had a particular interest in weather data recently and I've been developing maps to show where I might consider living, based on my ideal climate.
In 2022, I had a particular interest in developing a comprehensive series of maps of Delaware and later the Delmarva peninsula as a whole. This led me to spend several months creating my own map of Delmarva. This map was inspired by topographic relief (elevation) maps, but my map focuses on wetland representation, rather than elevation. This was done as Delmarva is very flat, so an elevation map wouldn't be very interesting.
To avoid the costs of licensing expensive GIS packages, virtually all of my experience has been with QGIS, a well-featured open-source GIS application. During my time at the Office of Highway Safety, I developed several Python scripts to automate certain tasks in QGIS. I've also developed Python scripts that work outside of QGIS, but relate to GIS as a whole. Specifically, I developed a geocoder script that can use an Esri locator service without using their ArcGIS software. This script merely requires a CSV file containing addresses and the Esri locator tool to produce output.