How to plot density map in square km. I have the shapefile (shp) of the map and I have the data with location (longitude, latitude). I used density point function in the ArcGIS and I don't know how to convert the density to per square km. I changed the unit of my map from Decimal Degree to kilometers. I wanted to change the Area Unit in the Dot Density to square km but it is not possible. Kindly help.