https://github.com/r-spatial/lwgeom

bindings to the liblwgeom library
https://github.com/r-spatial/lwgeom

Last synced: 4 months ago
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bindings to the liblwgeom library

• Host: GitHub
• URL: https://github.com/r-spatial/lwgeom
• Owner: r-spatial
• Created: 2017-11-03T12:59:14.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2025-02-11T14:11:21.000Z (5 months ago)
• Last Synced: 2025-03-12T05:36:10.950Z (4 months ago)
• Language: C
• Homepage: https://r-spatial.github.io/lwgeom/
• Size: 7.88 MB
• Stars: 61
• Watchers: 11
• Forks: 25
• Open Issues: 8
• Metadata Files:
  • Readme: README.md
  • Changelog: NEWS.md

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README

        
# lwgeom

R bindings to the [liblwgeom](https://github.com/postgis/postgis/tree/master/liblwgeom) library

[![R-CMD-check](https://github.com/r-spatial/lwgeom/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/r-spatial/lwgeom/actions/workflows/R-CMD-check.yaml)

[![Coverage Status](https://img.shields.io/codecov/c/github/r-spatial/lwgeom/master.svg)](https://app.codecov.io/github/r-spatial/lwgeom?branch=master)

[![CRAN](http://www.r-pkg.org/badges/version/lwgeom)](https://cran.r-project.org/package=lwgeom)

[![cran checks](https://badges.cranchecks.info/worst/lwgeom.svg)](https://cran.r-project.org/web/checks/check_results_lwgeom.html)

[![Downloads](http://cranlogs.r-pkg.org/badges/lwgeom?color=brightgreen)](https://www.r-pkg.org:443/pkg/lwgeom)

This package provides functions that use

`liblwgeom`, including `st_geohash()`,

`st_minimum_bounding_circle()`, `st_split()`, `st_subdivide()`,

`st_transform_proj()` (transform through proj, omitting

GDAL) and `st_as_sfc.TWKB()` (creates `sfc` from [tiny

wkb](https://github.com/TWKB/Specification/blob/master/twkb.md)),

as well as the geodetic (spherical/ellipsoidal) geometry

functions `st_geod_area()`, 

`st_geod_length()`, 

`st_geod_distance()`, 

`st_geod_covers()`,

`st_geod_azimuth()`, 

and `st_geod_segmentize()`. The previously offered `st_make_valid()`

is now a generic in package `sf` (`sf::st_make_valid()`).

## Installing 

`lwgeom` depends on [sf](https://github.com/r-spatial/sf), which

has to be installed first.  This package uses the liblwgeom library,

and compiles a shipped (and modified) version of liblwgeom.  It links

to the GEOS and PROJ libraries. 

To install from source, it should be enough to have installed

`sf` from source; the resources for this package (PROJ, GEOS)

are being reused.

## lwgeom source now included 

Previous to version 0.1-6, `lwgeom` would also try to link the system

library liblwgeom; from 0.1-6 on only the shipped version is used.

## Contributing

* Contributions of all sorts are most welcome, issues and pull requests are the preferred ways of sharing them.

* When contributing pull requests, please adhere to the package style (in package code use `=` rather than `<-`; don't change indentation; tab stops of 4 spaces are preferred)

* This project is released with a [Contributor Code of Conduct](CONDUCT.md). By participating in this project you agree to abide by its terms.