crs_transform: transformation of coordinates between coordinate reference...
In metno/gibson: get in-situ observations

crs_transform

R Documentation

transformation of coordinates between coordinate reference systems

Description

Transformation of coordinates between coordinate reference systems (CRSs). The CRS are specified with proj4 strings http://proj4.org/. A list of proj4 string can be found at http://spatialreference.org/.

Usage

crs_transform(xy.from=NULL,
              proj4.from=NULL,
              proj4.to=NULL)

Arguments

`xy.from`	data frame with two columns: x and y. They are the Easting and Northing coordinates to be transformed.
`proj4.from`	proj4 string specifying the CRS for xy.from.
`proj4.to`	proj4 string specifyng the CRS for the transformed coordinates.

Value

An object of class SpatialPoints fromt the R-package sp.

Note

This function requires the R-packages rgdal and sp

Author(s)

Cristian Lussana

Examples


# load libraries
library(gibson)
# transformation from long-lat to UTM33 CRSs
res<-crs_transform(data.frame(x=c(45,50),y=c(12,0)),proj4.from="+proj=longlat +datum=WGS84",proj4.to="+proj=utm +zone=33 +ellps=WGS84 +datum=WGS84 +units=m +no_defs")
# from SpatialPoins object to a matrix
mat<-coordinates(res)
x.to<-mat[,1]
y.to<-mat[,2]

metno/gibson documentation built on Feb. 12, 2024, 7:25 a.m.