Closed gavg712 closed 2 years ago
Consider the following script example:
##Demo=group ##testthat=name ##Testing CRS input=display_name ##Point=point ##CRS=crs ##Point_reproj=output vector Point_reproj <- st_transform(Point, crs = CRS)
If the crs input is a "User defined CRS", then the parameter setting in the R script will be "USER:...". This is a useless string for CRS transformations within a R session:
crs
For instance, using this inputs...
{'Point' : '-78.513938,-0.218095 [EPSG:4326]', 'CRS' : QgsCoordinateReferenceSystem('USER:100001'), 'Point_reproj' : 'TEMPORARY_OUTPUT' }
...the algorithm will set in R
======== test data settings======== point_crs <- st_crs('GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]]') Point <- st_sfc(st_point(c(-78.513938,-0.218095)), crs = point_crs) CRS <- "USER:100001" =============================
If this CRS object is used, an error will occur. The sf and sp functions will not find a way to handle the string "USER:100001"
sf
======= Testing CRS string ======== Point CRS Transform Error in CPL_transform(x, crs, aoi, pipeline, reverse, desired_accuracy, : crs not found: is it missing? Calls: st_transform ... st_transform.sfc -> st_sfc -> structure -> CPL_transform
Is there any reason to set authid instead of WKT or Proj4string in the crs parameter in R?
Consider the following script example:
If the
crsinput is a "User defined CRS", then the parameter setting in the R script will be "USER:...". This is a useless string for CRS transformations within a R session:For instance, using this inputs...
...the algorithm will set in R
If this CRS object is used, an error will occur. The
sfand sp functions will not find a way to handle the string "USER:100001"Is there any reason to set authid instead of WKT or Proj4string in the crs parameter in R?