Figured that would be a fun way to introduce some complicated topics regarding Geo Analytics. The things that we all take for granted. The post is kind of a short history lesson on Datums, Latitude/Longitude, Centroids and Polygons.
At the conclusion of my post is a short instructional video that demonstrates how you can utilize Qlik's GeoAnalytics to directly ingest the areas and the data in ESRI Shapefiles.
If you are in the Healthcare space you will want to especially focus on the topic of the video "Social Determinants of Health." However, regardless of your industry if you are pursuing Geo Analytics this is something you probably want to read/watch.