char2dms: Convert character vector to DMS-class object

In sp: Classes and Methods for Spatial Data

Convert character vector to DMS-class object

Description

These two helper functions convert character vectors and decimal degree vectors to the DMS-class representation of degrees, minutes, and decimal seconds. "DMS" objects cannot contain NAs.

Usage

char2dms(from, chd = "d", chm = "'", chs = "\"")
dd2dms(dd, NS = FALSE)

Arguments

from	character vector of degree, minute, decimal second data
chd	degree character terminator
chm	minute character terminator
chs	second character terminator
dd	numeric vector of decimal degrees
NS	logical, TRUE for north/south decimal degrees, FALSE for east/west decimal degrees

Details

In char2dms, the input data vector should use a regular format, such as that used in the PROJ.4 library, with a trailing capital (NSWE) indicating compass direction.

Value

Both functions return a "DMS" object.

Methods

from = "DMS", to = "numeric"

coerce a "DMS" object to a "numeric" vector

from = "DMS", to = "character"

coerce a "DMS" object to a "character" vector (the as.character.DMS S3 method is also available)

Author(s)

Roger Bivand [e-mail]

See Also

DMS-class

Examples

data(state)
str(state.center$y)
stateN <- dd2dms(state.center$y, NS=TRUE)
str(attributes(stateN))
ch.stateN <- as.character(stateN)
str(ch.stateN)
stateNa <- char2dms(ch.stateN)
str(attributes(stateNa))
ch.stateN <- as(stateN, "character")
str(ch.stateN)
stateNa <- char2dms(ch.stateN)
str(attributes(stateNa))

sp documentation built on May 29, 2024, 5:33 a.m.