projInfo: List PROJ.4 tag information

Description Usage Arguments Details Value Note Author(s) References Examples

Description

The projInfo function lists known values and descriptions for PROJ.4 tags for tag in c("proj", "ellps", "datum", "units"); getPROJ4VersionInfo returns the version of the underlying PROJ.4 release, getPROJ4libPath returns the value of the PROJ\_LIB environment variable, projNAD detects the presence of NAD datum conversion tables (looking for conus).

Usage

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Arguments

type

One of these tags: c("proj", "ellps", "datum", "units")

Details

The output data frame lists the information given by the proj application with flags -lp, -le, -ld or -lu.

Value

A data frame with a name and description column, and two extra columns for the "ellps" and "datum" tags.

Note

Loading the rgdal package changes the PROJ\_LIB environmental variable to the PROJ.4 support files bundles with the package.

Author(s)

Roger Bivand Roger.Bivand@nhh.no

References

http://proj.maptools.org/

Examples

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