You just received an interesting map and want to use it as a GIS layer, but it is in .PDF format and won’t open in ArcMap. It would be easiest to get your hands on the GIS source data that the map was made from, but if that is not possible, there is still a way to use the map. Georeferencing is the process of assigning spatial reference information to a data layer so that it will be projected at the correct location and line up with your other spatially-referenced data in ArcMap. This can be accomplished in a few simple steps. Tips Warnings Writer Bio
