sp (version 1.1-1)

is.projected: Sets or retrieves projection attributes on classes extending SpatialData

Description

Sets or retrieves projection attributes on classes extending SpatialData; set or retrieve option value for error or warning on exceedance of geographical coordinate range, set or retrieve option value for exceedance tolerance of geographical coordinate range. Note that only +proj=longlat +ellps=WGS84 is accepted for geographical coordinates, which must be ordered (eastings, northings); the +ellps= definition must be given (or expanded internally from a given +datum= value) for recent versions of the PROJ.4 library, and should be set to an appropriate value.

Usage

is.projected(obj)
proj4string(obj)
proj4string(obj) <- value
get_ll_warn()
get_ll_TOL()
get_ReplCRS_warn()
set_ll_warn(value)
set_ll_TOL(value)
set_ReplCRS_warn(value)

Arguments

obj

An object of class or extending Spatial-class

value

For proj4string CRS object, containing a valid proj4 string; attempts to assign an object containing longlat to data extending beyond longitude [-180, 360] or lattitude [-90, 90] will be stopped. For set_ll_warn

Value

• is.projected returns a logical that may be NA; proj4string returns a character vector of length 1.

Details

proj4 strings are operative through CRAN package rgdal. For strings defined as longlat, the minimum longitude should be -180, the maximum longitude 360, the minimum latitude -90, and the maximum latitude 90. Note that the proj4string replacement method does not project spatial data - for this use spTransform methods in the rgdal package.

See Also

CRS