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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

0.2-6

License

GPL (>=3)

Issues

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Stars

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Maintainer

Robert Hijmans

Last Published

April 2nd, 2025

Functions in terra (0.2-6)

SpatExtent-class

Class "SpatExtent"
adjacent

Adjacent cells
SpatMessages-class

Messages
area

Area and length
SpatVector-class

Class "SpatVector"
SpatOptions-class

options
aggregate

Aggregate raster cells
Summary-methods

Summary methods
SpatDataFrame-class

C++ classes
SpatRaster-class

SpatRaster class
as.data.frame

Get the attributes of a SpatVector
crop

Crop
geom

geom
hist

Histogram
head and tail

Show the head or tail of a Spat* object
cover

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

Focal values
geomtype

Geometry type of a SpatVector
gridDistance

Distance on a grid
dimensions

Dimensions of a SpatRaster or SpatVector
crs

Get or set a coordinate reference system (projection)
disaggregate

Disaggregate raster cells
clamp

Clamp values
c

Combine
isLonLat

Check for longitude/latitude crs
mask

Mask values in a SpatRaster
rast

Create a SpatRaster
read and write

read from or write to file
ifel

ifelse for SpatRaster objects
predict

Spatial model predictions
flip

Flip a raster
factors

Factors
atan2

Two argument arc-tangent
initialize

Initialize a SpatRaster with values
reclassify

Reclassify
transpose

Transpose
sampleRegular

Take a regular sample
project

Change the coordinate reference system
trim

Trim a SpatRaster
sources

Data sources of a SpatRaster
subset-vector

Subset of a SpatVector
rasterize

rasterize
compareGeom

Compare geometries of SpatRaster objects
extract

Extract values from a SpatRaster
coerce

Coercion to other object types
extent

ext
math

Mathematical operations with SpatRaster objects
range

get or compute min and max values
plot

Plot a SpatRaster or SpatVector
draw

Draw a line, polygon, extent, or points
shift

Shift
writeRaster

Write raster data to a file
subset

Subset of a SpatRaster
vect

Create SpatVector objects
plotRGB

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

warp a SpatRaster
terra-package

terra
names

Names of Spat* objects
reduce

reduce
overlay

Overlay SpatRaster objects
rotate

rotate
values

Get cell values
unique

Unique values
xyRowColCell

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

Merge SpatRaster or SpatExtent objects