README.rmd

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![](docs/logo.svg)

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# [Fast raster extraction and manipulation in R](https://hunzikp.github.io/velox/)

velox is an R package for performing fast extraction and manipulation operations on geospatial raster data. 
velox is fast because:

* All raster operations are performed in C++.
* Geometric operations are implemented with the [Boost Geometry](http://www.boost.org/doc/libs/1_65_1/libs/geometry/doc/html/index.html) libraries.
* All data is held in memory.

velox is fully interoperable with the [raster](https://cran.r-project.org/package=raster), [sp](https://cran.r-project.org/package=raster), and [sf](https://cran.r-project.org/package=raster) packages.

[![Travis-CI Build Status](https://travis-ci.org/hunzikp/velox.svg?branch=master)](https://travis-ci.org/hunzikp/velox)
[![codecov](https://codecov.io/gh/hunzikp/velox/branch/master/graph/badge.svg)](https://codecov.io/gh/hunzikp/velox)
[![CRAN Version](http://www.r-pkg.org/badges/version/velox)](https://cran.r-project.org/package=velox)
`r require(badger); badge_devel("hunzikp/velox", "green")`
[![CRAN Downloads](http://cranlogs.r-pkg.org/badges/last-week/velox)](https://www.r-pkg.org/pkg/velox)

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## Features

velox currently offers the following features:

* Raster value extraction given *polygons*, *lines*, or *points*
* Focal value calculation (i.e. moving window filters)
* Rasterization of polygons or lines
* Raster aggregation
* Cropping
* Image patch flattening and reconstruction

For more information, see the [velox project website](https://hunzikp.github.io/velox/).