Converter functions to build SpatialLinesDataFrame objects
Create polygon lists and bounding boxes from imported shapefiles
Read GSHHS polygons into SpatialPolygons object
Convert sp line and polygon objects to PBSmapping PolySet objects
coercion between sp objects and spatstat objects
read/write to/from (ESRI) asciigrid format
Find azimuth for geographical coordinates
Create and write KML file for PNG image overlay
Break polygons at meridian for recentering
Making SpatialPolygons objects from RArcInfo input
Read arc shape files into SpatialLinesDataFrame objects
Read points shape files into SpatialPointsDataFrame objects
Read polygon shape files into SpatialPolygonsDataFrame objects
Export SpatialPolygons object as S-Plus map for WinBUGS
Convert SpatialPolygons object for Stata tmap command
Methods for sun ephemerides calculations
Aggregate Polygons in a SpatialPolygons object