bindings to the liblwgeom library
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edzer Merge pull request #25 from etiennebr/wkt
Bind st_astext from lwgeom
Latest commit b16b51d Aug 28, 2018

README.md

lwgeom

R bindings to the liblwgeom library

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This package provides a few functions that require liblwgeom, including st_geohash, st_make_valid, st_minimum_bounding_circle, st_split, st_subdivide, st_transform_proj (transform through proj, omitting GDAL) and st_as_sfc.TWKB (create sfc from tiny wkb), 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.

Installing without liblwgeom preinstalled

lwgeom depends on sf, which has to be installed first. It uses the liblwgeom library. When installing from source, it will compile a shipped (and modified) version of this library when the library is not autodetected. In this case, the GEOS and Proj.4 libraries have to be available.

Windows

The lwgeom package on windows compiles the liblwgeom sources shipped with the package, and uses the external dependencies (GEOS, PROJ) from the gdal2 winlib.

Linux

If you have liblwgeom installed, but want to install this package using the shipped library, install with

R CMD INSTALL lwgeom --configure-args="--without-liblwgeom"

and check with

R CMD check --install-args="--configure-args=--without-liblwgeom" lwgeom_VERSION.tar.gz

Installing with liblwgeom preinstalled

MacOS

According to https://github.com/r-spatial/sf/issues/349, brew install postgis installs a working liblwgeom. In case of problems, search for brew in the sf issues before opening a new one.

Linux

On ubuntu, install the following:

sudo add-apt-repository ppa:ubuntugis/ubuntugis-unstable
sudo apt-get update
sudo apt-get install libgdal-dev libgeos-dev libproj-dev libudunits2-dev liblwgeom-dev