Exploring the EPSG registry

We described a couple of common and widely used SRSs, but there are a lot of them. There are several archives on the internet where you can find detailed information about SRSs and their elements, that is ellipsoids, datums, unit of measurements, projected, or geographic reference systems. One of the most authoritative and complete data sets is the EPSG Geodetic Parameter Registry. If you are curious about it, you can open your browser and point it to http://epsg-registry.org. Then, try a simple search by inserting a location name in the Area textbox as shown in the following screenshot: