IDs                     Get sp feature IDs
SLDFtoLine              Convert a SpatialLinesDataFrame to a single
                        line matrix with associated segment information
SPDFareas               Return areas of polygons in a
                        SpatialPolygonsDataFrame
SPDFtoPointsDF          Convert SpatialPointsDataFrame to a regular
                        data.frame with the coordinates as "x" and "y"
Srs1                    Entirely fabricated spatial data for taRifx.geo
                        examples
as.SpatialPolygons.bbox
                        Convert a bounding box to a SpatialPolygons
                        object Bounding box is first created (in
                        lat/lon) then projected if specified
cleanLatLon             Standardize latitude/longitude coordinates
                        Cleans up character representations of lat/lon
                        coordinates
clipToExtent            Restrict to extent of a polygon Currently does
                        the sloppy thing and returns any object that
                        has any area inside the extent polygon
closestPoint            Find closest point to a given point's
                        coordinates (closestPoint).
countPointsInPolys      Count points within a polygon
cumDist                 Calculate cumulative distance along a matrix of
                        x,y coordinates
gGeoCode                Geocode using Google Maps API (deprecated) This
                        has been generalized to the taRifx::geocode()
                        function
geocode                 Geocode character vectors using online services
georoute                Find driving routes using online services
interpolateAndApplyWithinSpatial
                        Generic function to interpolate from a polygon
                        to points lying inside it This function was
                        designed to solve the following problem.
                        Suppose you have counts of the number of
                        entities inside a polygon (N).  To compute
                        distances to a point, you might take the
                        distance from the polygon centroid.  But this
                        is too simplistic-it discards the positional
                        uncertainty inherent in not knowing the exact
                        location of each entity which makes up the
                        count.  Instead, we repeatedly sample N points
                        from the census block group centroids which lie
                        within our polygon, weight them by their
                        population, and compute distances from there.
interpolatePathpoints   Interpolate points along a path
interpolatePolyPoint    Interpolate points from polygon SPDF This
                        function returns (weighted) sample points in
                        fine for every polygon in crude. Thus running
                        it repeatedly gives you useful variation that
                        reflects the interpolation uncertainty.
interpolateWithinSingleSpatial
                        Interpolate and sample within a single polygon
                        (Called by interpolateWithinSpatial)
lineDist                Line distance in SpatialLinesDataFrame Stores
                        length of each line segment in a
                        SpatialLinesDataFrame's data.frame
merge                   Merge a SpatialPolygonsDataFrame with a
                        data.frame
overlayPolyPoly         Split polygons into contiguous parts Overlay,
                        in the sense described here:
                        http://resources.esri.com/help/9.3/ArcGISengine/java/Gp_ToolRef/geoprocessing/overlay_analysis.htm
pointDistPairwise       Create all pairwise distances of points from a
                        SpatialPointsDataFrame
pointgrid2SpatialPolygons
                        Take a grid of regularly spaced points (such as
                        those output by the centroids of Arc's fishnet
                        function) and convert it to various grid data
                        types
rbind.SpatialPolygonsDataFrame
                        rbind SpatialPolygonsDataFrames together,
                        fixing IDs if duplicated
reshapeSLDF             Reshape a spatialLinesDataFrame into a series
                        of points with associated information
simpledist              Cartesian distance between points
smoothLines             Smooth the line segments in a
                        SpatialLinesDataFrame
states                  U.S. State names, abbreviations, and FIPS codes
subsetSPDF              Subset SpatialPolygonsDataFrame or
                        SpatialPointsDataFrame
