sp: char2dms – R documentation

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char2dms

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 Roger.Bivand@nhh.no

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

Classes and Methods for Spatial Data

v1.4-5

GPL (>= 2)

Authors

Edzer Pebesma [aut, cre], Roger Bivand [aut], Barry Rowlingson [ctb], Virgilio Gomez-Rubio [ctb], Robert Hijmans [ctb], Michael Sumner [ctb], Don MacQueen [ctb], Jim Lemon [ctb], Finn Lindgren [ctb], Josh O'Brien [ctb], Joseph O'Rourke [ctb]

Initial release