R: Get Lat-Lon Perimeter

getGEOperim {GEOmap} | R Documentation

## Get Lat-Lon Perimeter

### Description

Get rectangular perimeter of region defined by set of Lat-Lon

### Usage

    getGEOperim(lon, lat, PROJ, N)

### Arguments

`lon` | vector of lons
`lat` | vector of lats
`PROJ` | projection structure
`N` | number of points per side

### Details

perimeter is used for antipolygon

### Value

List:

`x` | x-coordinates projected
`y` | y-coordinates projected

### Author(s)

Jonathan M. Lees<jonathan.lees.edu>

### Examples

    ###  target region
    PLOC= list(LON=c(138.3152, 139.0214),
    LAT=c(35.09047, 35.57324))

    PLOC$x =PLOC$LON
    PLOC$y =PLOC$LAT

    ####  set up projection
    PROJ = setPROJ(type=2, LAT0=mean(PLOC$y) , LON0=mean(PLOC$x) )

    perim= getGEOperim(PLOC$LON, PLOC$LAT, PROJ, 50)

[Package GEOmap version 2.4-0 Index]