As a beginner in GIS, I am working on crime data (from Denver Police Department) and this dataset seems to have two different types of coordinate system. One is latitude and longitude in decimal degree, but I am not sure about the other. Column headers of these are Geo_X and Geo_Y (as is attached picture). I can still work for my project using DD system, but I just want to know what the other system (geo_x and geo_y) is about. Thanks!