# rgeos v0.5-2

Monthly downloads

## Interface to Geometry Engine - Open Source ('GEOS')

Interface to Geometry Engine - Open Source ('GEOS') using the C 'API' for topology operations on geometries. The 'GEOS' library is external to the package, and, when installing the package from source, must be correctly installed first. Windows and Mac Intel OS X binaries are provided on 'CRAN'. ('rgeos' >= 0.5-1): Up to and including 'GEOS' 3.7.1, topological operations succeeded with some invalid geometries for which the same operations fail from and including 'GEOS' 3.7.2. The 'checkValidity=' argument defaults and structure have been changed, from default FALSE to integer default '0L' for 'GEOS' < 3.7.2 (no check), '1L' 'GEOS' >= 3.7.2 (check and warn). A value of '2L' is also provided that may be used, assigned globally using 'set_RGEOS_CheckValidity(2L)', or locally using the 'checkValidity=2L' argument, to attempt zero-width buffer repair if invalid geometries are found. The previous default (FALSE, now '0L') is fastest and used for 'GEOS' < 3.7.2, but will not warn users of possible problems before the failure of topological operations that previously succeeded.

## Functions in rgeos

Name | Description | |

bbox2SP | Converts a bounding box into a SpatialPolygons object. | |

SpatialRings | create SpatialRings or SpatialRingsDataFrame | |

RGEOS Polygon Hole Comment Functions | RGEOS Polygon Hole Comment Functions | |

gpc.poly.nohole-class | Class "gpc.poly.nohole" | |

polygonsLabel | Compute optimal label positions for polygons | |

gIsEmpty | Is Geometry Empty? | |

polyfile | Read/Write polygon data | |

SpatialCollections | create SpatialCollections | |

over | Find spatial join or intersections | |

gBuffer | Buffer Geometry | |

gNearestPoints | Closest Points of two Geometries | |

gArea | Area of Geometry | |

gIsSimple | Is Geometry Simple? | |

gIsRing | Is Geometry a Ring? | |

gSymdifference | Geometry Symmetric Difference | |

gIsValid | Is Geometry Valid? | |

Ring-class | Class "Ring" | |

RGEOS WKT Functions | RGEOS WKT Functions | |

gProject | Project Points to Line Geometry | |

gTouches | Geometry Relationships - Touches | |

gInterpolate | Interpolate Points along Line Geometry | |

gRelate | Geometry Relationships - Intersection Matrix Pattern (DE-9IM) | |

gDistance | Distance between geometries | |

SpatialCollections-class | Class "SpatialCollections" | |

SpatialRingsDataFrame-class | Class "SpatialRingsDataFrame" | |

SpatialRings-class | Class "SpatialRings" | |

gpc.poly-class | Class "gpc.poly" | |

gUnion | Geometry Union | |

gEquals | Geometry Relationships - Equality | |

RGEOS Experimental Functions | Experimental Functions | |

gIntersects | Geometry Relationships - Intersects and Disjoint | |

new-generics | Generics/Methods for polygon objects | |

gDifference | Geometry Difference | |

gLength | Length of Geometry | |

gBoundary | Boundary of Geometry | |

gSimplify | Simplify Geometry | |

gCentroid | Centroid of Geometry | |

gContains | Geometry Relationships - Contains and Within | |

gEnvelope | Envelope of Geometry | |

gConvexHull | Convex Hull of Geometry | |

gIntersection | Geometry Intersections | |

gDelaunayTriangulation | Compute Delaunay triangulation between points | |

RGEOS Utility Functions | RGEOS Utility Functions | |

gNode | Linestring Noder | |

gCrosses | Geometry Relationships - Crosses and Overlaps | |

gPointOnSurface | Point on Surface of Geometry | |

gPolygonize | Linestring Polygonizer | |

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## Last month downloads

## Details

Date | 2019-10-02 |

LinkingTo | sp |

NeedsCompilation | yes |

LazyLoad | yes |

License | GPL (>= 2) |

URL | https://r-forge.r-project.org/projects/rgeos/ https://trac.osgeo.org/geos/ http://rgeos.r-forge.r-project.org/index.html |

SystemRequirements | GEOS (>= 3.2.0); for building from source: GEOS from http://trac.osgeo.org/geos/; GEOS OSX frameworks built by William Kyngesburye at http://www.kyngchaos.com/ may be used for source installs on OSX. |

RoxygenNote | 6.1.1 |

Packaged | 2019-10-03 07:49:27 UTC; rsb |

Repository | CRAN |

Date/Publication | 2019-10-03 09:50:02 UTC |

imports | graphics , stats , utils |

suggests | maps , maptools (>= 0.8-5) , rgdal , testthat , XML |

depends | methods , R (>= 3.3.0) , sp (>= 1.1-0) |

Contributors | Karl Ove Hufthammer, Edzer Pebesma, Colin Rundel, Patrick Giraudoux, Rainer Stuetz, Martin Davis, Sandro Santilli |

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