I have a list of shapefiles that I am trying to merge together to create one larger shapefile. The issue here is that these shapefiles have different coordinate systems. The list below identifies all the different datums and coordinate systems I am working with. The top of each category in bold is the Datum followed by the italicized Geographic Coordinate system in that datum and the underlined Projected Coordinate System used with that particular datum and GCS. "NA" refers to no PCS used with that particular GCS in that Datum. Would anyone with expertise working with coordinate systems be able to suggest one PCS that would be best to batch project to? I am most interested in polygon areas of these shapefiles so once I merge them I will need to calculate geometry to calculate the area of each polygon within the shapefile and I believe a PCS is necessary in order to do this. I am having trouble figuring out which PCS would be best given what I have below and if it is even possible to choose just one PCS given the different coordinate systems I have here. Any advice, info or tips would be great!
|Row Labels||Count of GCS||Count of PCS|
|SA_SIR_22S Transverse Mercator||1||1|