move (version 4.1.12)

spTransform: Transform projection of movement track

Description

The spTransform function transforms the coordinates stored in the Move object from the default long/lat coordinates to the default aeqd (Azimuthal Equi-distance) projection or a user defined projection.

Usage

# S4 method for Move,character
spTransform(x,CRSobj,center=FALSE)
  # S4 method for Move,missing
spTransform(x,center=FALSE,...)

Value

same as input object with coordinates transformed to the new coordinate reference system.

Arguments

x

a move, moveStack or moveBurst object to be transformed

CRSobj

object of class CRS, or of class character in which case it is converted to CRS. Can be left empty if center=TRUE

center

logical, if TRUE the center of the coordinate system is the center of the track; FALSE is default

...

for additional arguments

Author

Marco Smolla & Anne Scharf

Details

The spTransform function transforms the coordinates of a Move object by default from "+proj=longlat" to "+proj=aeqd". In this format the coordinates can be used by the brownian.bridge.dyn function.
If center is TRUE the center of the coordinate system is set to the center of the track.

Examples

## create a Move object
data(leroy)
## transform the Move object by default into "+aeqd" projection method 
## and center the coordinate system
spTransform(leroy, center=TRUE)

## transform the Move object into another projection method, like mollweide
spTransform(leroy, CRSobj="+proj=moll +ellps=WGS84")

##check projection method
proj4string(leroy)
# \dontshow{
spTransform(leroy, CRSobj=CRS("+proj=moll +ellps=WGS84"))
data(fishers)
spTransform(fishers, center=TRUE)
# }