Build crs table of all equivalent format variations by scraping spatialreference.org. Saves table as tab-delimited text file. NOTE: Might take a while.

Arguments:

• savepath: The absolute or relative filepath to which to save the crs table, including the ".txt" extension.

Lookup crscode on spatialreference.org and return in specified format.

Arguments:

• codetype: "epsg", "esri", or "sr-org".
• code: The code.
• format: The crs format of the returned string. One of "ogcwkt", "esriwkt", or "proj4", but also several others...

Returns:

• Crs string in the specified format.