I need to georeference a jpeg map of an archaeological excavation with an arbitrary grid system where each square in the grid is 1 m x 1 m. The locations of artifacts within the grid are listed according to Northing and Easting decimal locations relative to a false origin 0,0 and the distance north and east from the origin point in meters. For example, an artifact located 1.5 m north and 2 m east of the origin point is at 1.5 N, 2 E.
How can I create such an arbitrary coordinate system in ArcGIS Pro in order to produce a map of the artifact locations across the excavation grid?
