get_prj4s: Retrieve proj4 projection string.

In JGCRI/gcammaptools: Plot GCAM Output on Maps

Description

Provides a lookup list for default proj4 strings utilized. Users may also specify their own lookup list. Options also include providing either the EPSG, ESRI, or SR-ORG projection codes to retrieve the associated proj4 string from a web query from http://spatialreference.org. Definitions for proj4 string parmeters can be referenced here: http://proj4.org/parameters.html#parameter-list

Usage

get_prj4s(obj = NULL, prj_type = NULL, prj_code = NULL,
  prj4s_key = NULL)

Arguments

obj	Use object instead that has a predefined proj4 string.
prj_type	The projection type is either 'esri', 'epsg', or 'sr-org' or 'prj4s_key'.
prj_code	The projection code as an integer for EPSG, ESRI, or SR-ORG.
prj4s_key	Lookup key string identifying the default projection.

JGCRI/gcammaptools documentation built on May 7, 2019, 10:11 a.m.