This is a helper function, commonly used with SDA_query to extract WKT (well-known text) representation of geometry to an sp-class object.

processSDA_WKT(d, g = "geom", p4s = "+proj=longlat +datum=WGS84")

Arguments

d

data.frame returned by SDA_query, containing WKT representation of geometry

g

name of column in d containing WKT geometry

p4s

PROJ4 CRS definition, typically GCS WGS84

Value

A Spatial* object.

Details

The SDA website can be found at https://sdmdataaccess.nrcs.usda.gov. See the SDA Tutorial for detailed examples.

The SDA website can be found at https://sdmdataaccess.nrcs.usda.gov. See the SDA Tutorial for detailed examples.

Note

This function requires the httr, jsonlite, XML , and sf packages.

This function requires the httr, jsonlite, XML, and rgeos packages.

Author

D.E. Beaudette

D.E. Beaudette