AnsweredAssumed Answered

How do I know which PCS is most appropriate to project to?

Question asked by mctraverso on Jul 12, 2017
Latest reply on Jul 25, 2017 by MKennedy-esristaff

Hello!

 

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 LabelsCount of GCSCount of PCS
D_SIRGAS33
GCS_SIRGAS33
      SIRGAS_UTM_Zone_21S11
      SIRGAS_UTM_Zone_23S22
D_SIRGAS_200077
GCS_SIRGAS 200077
       NA11
      SIRGAS_2000_UTM_zone_22S55
      SIRGAS_UTM_Zone_22S11
D_South_American_196911
GCS_South_American_196911
       SAD_1969_UTM_Zone_22S11
D_South_American_Datum_1969_9611
GCS_SAD69(96)11
        SAD69_96_UTM_zone_23S11
D_WGS_19844848
GCS_WGS_19844747
        NA3232
       WGS_1984_UTM_Zone_22S1111
       WGS_1984_UTM_Zone_23S44
LL8411
         NA11
SA19691414
LL-SA691414
        SAD_1969_UTM_Zone_22S99
        SAD_1969_UTM_Zone_23S44
        SIRGAS_2000_UTM_Zone_23S11
SIRGAS22
SIRGAS22
         SA_SIR_22S Transverse Mercator11
         SA-SIR-22S11
User Defined22
South_American_Datum_1969_/_Geographic22
   South_American_Datum_1969_/_UTM_zone_22S_(CM_51W)22

 

Thanks,

 

Melissa 

Outcomes