make_EPSG {rgdal}R Documentation

Make a data frame of EPSG projection codes

Description

Make a data frame of the now-defunct European Petroleum Survey Group (EPSG) geodetic parameter dataset as distributed with PROJ.4 software and included in this package. Because finding the correct projection specification is not easy, lists still known as EPSG lists are maintained, and more generally retrieved from Access databases. The data collated here are as distributed with PROJ.4.

Usage

make_EPSG(file=system.file("proj/epsg", package="rgdal"))

Arguments

file file name of the file matching EPSG codes and PROJ.4 arguments

Value

returns a data frame with columns:

code integer column of EPSG code numbers
note character column of notes as included in the file
prj4 character column of PROJ.4 arguments for the equivalent projection definitions

...

Note

See also Clifford J. Mugnier's Grids & Datums columns in Photogrammetric Engineering & Remote Sensing, http://www.asprs.org/resources/GRIDS/

Author(s)

Roger Bivand

References

http://www.epsg.org/

Examples

EPSG <- make_EPSG()
EPSG[grep("Oslo", EPSG$note), 1:2]
EPSG[1925:1927, 3]
EPSG[grep("Poland", EPSG$note), 1:2]
EPSG[grep("Amersfoort", EPSG$note), 1:2]
EPSG[grep("North Carolina", EPSG$note), 1:2]
EPSG[2202, 3]

[Package rgdal version 0.5-24 Index]