code: def _get_req_rem_geo(self, ds_info):
          
          if ds_info['dataset_groups'][0].startswith('GM'):
              if self.use_tc is False:
                  req_geo = 'GMODO'
                  rem_geo = 'GMTCO'
              else:
                  req_geo = 'GMTCO'
                  rem_geo = 'GMODO'
          elif ds_info['dataset_groups'][0].startswith('GI'):
              if self.use_tc is False:
                  req_geo = 'GIMGO'
                  rem_geo = 'GITCO'
              else:
                  req_geo = 'GITCO'
                  rem_geo = 'GIMGO'
          else:
              raise ValueError('Unknown dataset group %s' % ds_info['dataset_groups'][0])
          return req_geo, rem_geo
docs: Find out which geolocation files are needed.