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terra

This R package is a replacement of the raster package. It has a very similar, but simpler, interface, and it is much faster.

All native computations are done in C++. Classes, methods and properties are exposed via a Rcpp module. The R side has two main S4 classes (SpatRaster and SpatVector) that represent spatial data. These classes have only slot, a reference to a C++ object. They are used to provide a "normal" "S4" R user-interface as in the raster package.

The first (alpha) release is expected by July 2019.

Installation

You need to first install the development version of "raster".

Windows

If you are on Windows, you need to first install Rtools to get a C++ compiler that R can use. After that, you need the first install development version of "raster" for "terra" to work.

Then, in R, install the packages.

library(devtools)
devtools::install_github("rspatial/raster")
devtools::install_github("rspatial/terra")

Mac - OSX

The libraries GDAL (>= 2.0.0), GEOS (>= 3.3.0) and Proj.4 (>= 4.8.0) are required (as for sf)

With Homebrew you can do:

brew install gdal

And now, in R, install the packages.

library(devtools)
devtools::install_github("rspatial/raster")
devtools::install_github("rspatial/terra")

Linux

The libraries GDAL (>= 2.0.0), GEOS (>= 3.3.0) and Proj.4 (>= 4.8.0) are required (as for sf)

To install these on Ubuntu you can do:

sudo add-apt-repository ppa:ubuntugis/ubuntugis-unstable
sudo apt-get update
sudo apt-get install libgdal-dev libgeos-dev libproj-dev 

And now, in R, install the packages.

library(devtools)
devtools::install_github("rspatial/raster")
devtools::install_github("rspatial/terra")

See the sf instructions for installation on other linux systems.

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Version

Install

install.packages('terra')

Monthly Downloads

238,089

Version

0.2-8

License

GPL (>=3)

Issues

Pull Requests

Stars

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Maintainer

Robert Hijmans

Last Published

April 2nd, 2025

Functions in terra (0.2-8)

area

Area and length
disaggregate

Disaggregate raster cells
dimensions

Dimensions of a SpatRaster or SpatVector
compareGeom

Compare geometries of SpatRaster objects
flip

Flip a raster
global

global statistics
gridDistance

Distance on a grid
cover

Cover (replace) NA values with values of another raster
focal

Focal values
coerce

Coercion to other object types
click

Query by clicking on a map
head and tail

Show the head or tail of a Spat* object
hist

Histogram
crop

Crop
math

Mathematical operations with SpatRaster objects
mask

Mask values in a SpatRaster
rast

Create a SpatRaster
plotRGB

Red-Green-Blue plot of a multi-layered SpatRaster
plot

Plot a SpatRaster or SpatVector
crs

Get or set a coordinate reference system (projection)
extent

ext
draw

Draw a polygon, line, extent, or points
SpatOptions-class

options
rasterize

rasterize
subset

Subset of a SpatRaster
merge

Merge SpatRaster or SpatExtent objects
range

get or compute min and max values
sampleRegular

Take a regular sample
read and write

read from or write to file
warp

warp a SpatRaster
shift

Shift
reclassify

Reclassify
extract

Extract values from a SpatRaster
factors

Factors
writeRaster

Write raster data to a file
ifel

ifelse for SpatRaster objects
initialize

Initialize a SpatRaster with values
clamp

Clamp values
zoom

Zoom in on a map
transpose

Transpose
isLonLat

Check for longitude/latitude crs
geom

geom
values

Get cell values
sources

Data sources of a SpatRaster
subset-vector

Subset of a SpatVector
local

Local statistics
geomtype

Geometry type of a SpatVector
SpatDataFrame-class

C++ classes
vect

Create SpatVector objects
names

Names of Spat objects
terra-package

terra
zonal

Zonal statistics
rotate

rotate
project

Change the coordinate reference system
reduce

reduce
xyRowColCell

Coordinates from a row, column or cell number and vice versa
predict

Spatial model predictions
overlay

Overlay SpatRaster objects
trim

Trim a SpatRaster
unique

Unique values
aggregate

Aggregate raster cells
boundaries

boundaries (edges) detection
as.data.frame

Get the attributes of a SpatVector
SpatVector-class

Class "SpatVector"
adjacent

Adjacent cells
atan2

Two argument arc-tangent
SpatExtent-class

Class "SpatExtent"
c

Combine
SpatRaster-class

SpatRaster class
extend

Extend
classify

classify
distance

Geographic distance
buffer

buffer
interpolate

Interpolate