The coordinates are defined in the Document tab of the Plan View Options dialog. There is no conversion between UTM, State Plane, OSGB, and spherical mercator, so if your coordinates are set in any of these systems then it's essential to set the display coordinates accordingly. Getting the coordinates right is also important for the correct display of CAD files or locations with coordinates specified in latitude-longitude coordinates. If your coordinates are in latitude-longitude then its best to select the coordinate system before connecting to the database. This allows EnviroInsite to select the UTM Zone and State Plane Zone correctly based on your site location. Correct placement of WMS, Bing Maps, and ArcGIS Online images depends on the specification of a coordinate system.