spパッケージのクラスとメソッド2006 12 9 sp *1 *1 1 Points Line Polygon Grid sp p.1 | JJ J I m × 2 sp ✯ ✯ S4 ✯ GIS GDAL, ORG, shapelib sp p.2 | JJ J I m × 3 sp DCluster spdep geoR spgrass6 geoRglm spgwr GeoXp splancs gstat svcR maptools trip rgdal (spgpc) spGDAL, spmatools, spproj sp rgdal ( ) sp p.3 | JJ J I m × 4 sp CRS-class DMS-class GridTopology-class Line-class Lines-class Polygon-class Polygons-class Spatial-class Spatia
