classes and methods for spatial data

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Documentation for package ‘sp’ version 0.9-57

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A B C D F G H I L M N O P R S W Z misc

-- --

$,Spatial-method Class "Spatial"
$<-,Spatial-method Class "Spatial"
$<-,SpatialPoints,character-method Class "SpatialPoints" ~~~

-- A --

areaSpatialGrid define spatial grid
as.character.DMS Convert character vector to DMS-class object
as.data.frame.SpatialGrid Class "SpatialGrid" ~~~
as.data.frame.SpatialGridDataFrame Class "SpatialGridDataFrame"
as.data.frame.SpatialPixels Class "SpatialPixels" ~~~
as.data.frame.SpatialPixelsDataFrame Class "SpatialPixelsDataFrame" ~~~
as.data.frame.SpatialPoints Class "SpatialPoints" ~~~
as.data.frame.SpatialPointsDataFrame Class "SpatialPointsDataFrame"
as.data.frame.SpatialPolygons Class "SpatialPolygons"
as.data.frame.SpatialPolygonsDataFrame Class "SpatialPolygonsDataFrame"
as.double.DMS Class "DMS" for degree, minute, decimal second values
as.image.SpatialGridDataFrame image gridded spatial data, or convert to format for image
as.numeric.DMS Class "DMS" for degree, minute, decimal second values
as.SpatialLines.SLDF create objects of class SpatialLines or SpatialLinesDataFrame
as.SpatialPoints.SpatialPointsDataFrame Class "SpatialPointsDataFrame"
as.SpatialPolygons.GridTopology Make SpatialPolygons object from GridTopology object
as.SpatialPolygons.PolygonsList Making SpatialPolygons objects
as.SpatialPolygons.SpatialPixels Make SpatialPolygons object from GridTopology object

-- B --

bbox retrieve bbox from spatial data
bbox,ANY-method retrieve bbox from spatial data
bbox,Line-method retrieve bbox from spatial data
bbox,Lines-method retrieve bbox from spatial data
bbox,Polygon-method retrieve bbox from spatial data
bbox,Polygons-method retrieve bbox from spatial data
bbox,Spatial-method retrieve bbox from spatial data
bpy.colors blue-pink-yellow color scheme that prints well on black/white printers
bubble Create a bubble plot of spatial data

-- C --

cbind.SpatialGridDataFrame Class "SpatialGridDataFrame"
char2dms Convert character vector to DMS-class object
coerce,DMS,character-method Convert character vector to DMS-class object
coerce,DMS,numeric-method Convert character vector to DMS-class object
coerce,DMS-method Class "DMS" for degree, minute, decimal second values
coerce,GridTopology,data.frame-method Class "GridTopology" ~~~
coerce,GridTopology,SpatialPolygons-method Make SpatialPolygons object from GridTopology object
coerce,Lines,SpatialPoints-method a class for spatial lines
coerce,Polygons,Lines-method Class "SpatialPolygons"
coerce,SpatialGrid,data.frame-method Class "SpatialGrid" ~~~
coerce,SpatialGrid,SpatialPixels-method Class "SpatialGrid" ~~~
coerce,SpatialGridDataFrame,data.frame-method Class "SpatialGridDataFrame"
coerce,SpatialGridDataFrame,matrix-method Class "SpatialGridDataFrame"
coerce,SpatialGridDataFrame,SpatialPixelsDataFrame-method Class "SpatialGridDataFrame"
coerce,SpatialGridDataFrame,SpatialPointsDataFrame-method Class "SpatialGridDataFrame"
coerce,SpatialLines,SpatialPoints-method a class for spatial lines
coerce,SpatialLines,SpatialPointsDataFrame-method a class for spatial lines
coerce,SpatialLinesDataFrame,data.frame-method a class for spatial lines with attributes
coerce,SpatialLinesDataFrame,SpatialPointsDataFrame-method a class for spatial lines with attributes
coerce,SpatialPixels,data.frame-method Class "SpatialPixels" ~~~
coerce,SpatialPixels,SpatialGrid-method Class "SpatialPixels" ~~~
coerce,SpatialPixels,SpatialPolygons-method Make SpatialPolygons object from GridTopology object
coerce,SpatialPixelsDataFrame,data.frame-method Class "SpatialPixelsDataFrame" ~~~
coerce,SpatialPixelsDataFrame,matrix-method Class "SpatialPixelsDataFrame" ~~~
coerce,SpatialPixelsDataFrame,SpatialGridDataFrame-method Class "SpatialPixelsDataFrame" ~~~
coerce,SpatialPixelsDataFrame,SpatialPointsDataFrame-method Class "SpatialPixelsDataFrame" ~~~
coerce,SpatialPixelsDataFrame,SpatialPolygonsDataFrame-method Class "SpatialPixelsDataFrame" ~~~
coerce,SpatialPoints,data.frame-method Class "SpatialPoints" ~~~
coerce,SpatialPoints,matrix-method Class "SpatialPoints" ~~~
coerce,SpatialPoints,SpatialPixels-method Class "SpatialPoints" ~~~
coerce,SpatialPointsDataFrame,data.frame-method Class "SpatialPointsDataFrame"
coerce,SpatialPointsDataFrame,SpatialPixelsDataFrame-method Class "SpatialPoints" ~~~
coerce,SpatialPointsDataFrame,SpatialPoints-method Class "SpatialPointsDataFrame"
coerce,SpatialPolygons,SpatialLines-method Class "SpatialPolygons"
coerce,SpatialPolygonsDataFrame,data.frame-method Class "SpatialPolygonsDataFrame"
coerce,SpatialPolygonsDataFrame,SpatialLinesDataFrame-method Class "SpatialPolygonsDataFrame"
contour.SpatialGridDataFrame image gridded spatial data, or convert to format for image
contour.SpatialPixelsDataFrame image gridded spatial data, or convert to format for image
coordinates sets spatial coordinates to create spatial data, or retrieves spatial coordinates
coordinates,data.frame-method retrieve (or set) spatial coordinates
coordinates,GridTopology-method retrieve (or set) spatial coordinates
coordinates,Line-method retrieve (or set) spatial coordinates
coordinates,Lines-method retrieve (or set) spatial coordinates
coordinates,list-method retrieve (or set) spatial coordinates
coordinates,matrix-method retrieve (or set) spatial coordinates
coordinates,SpatialGrid-method retrieve (or set) spatial coordinates
coordinates,SpatialGridDataFrame-method retrieve (or set) spatial coordinates
coordinates,SpatialLines-method retrieve (or set) spatial coordinates
coordinates,SpatialPixels-method retrieve (or set) spatial coordinates
coordinates,SpatialPixelsDataFrame-method retrieve (or set) spatial coordinates
coordinates,SpatialPoints-method retrieve (or set) spatial coordinates
coordinates,SpatialPointsDataFrame-method Class "SpatialPointsDataFrame"
coordinates,SpatialPolygons-method retrieve (or set) spatial coordinates
coordinates,SpatialPolygonsDataFrame-method retrieve (or set) spatial coordinates
coordinates-methods retrieve (or set) spatial coordinates
coordinates<- sets spatial coordinates to create spatial data, or retrieves spatial coordinates
coordinates<-,data.frame-method retrieve (or set) spatial coordinates
coordinates<-,Spatial-method Class "Spatial"
coordinatevalues define spatial grid
coordnames retrieve or assign coordinate names for classes in sp
coordnames,Line-method retrieve or assign coordinate names for classes in sp
coordnames,Lines-method retrieve or assign coordinate names for classes in sp
coordnames,Polygon-method retrieve or assign coordinate names for classes in sp
coordnames,Polygons-method retrieve or assign coordinate names for classes in sp
coordnames,SpatialLines-method retrieve or assign coordinate names for classes in sp
coordnames,SpatialPoints-method retrieve or assign coordinate names for classes in sp
coordnames,SpatialPolygons-method retrieve or assign coordinate names for classes in sp
coordnames-methods retrieve or assign coordinate names for classes in sp
coordnames<- retrieve or assign coordinate names for classes in sp
coordnames<-,GridTopology,character-method retrieve or assign coordinate names for classes in sp
coordnames<-,GridTopology,character-method retrieve or assign coordinate names for classes in sp
coordnames<-,Line,character-method retrieve or assign coordinate names for classes in sp
coordnames<-,Lines,character-method retrieve or assign coordinate names for classes in sp
coordnames<-,Polygon,character-method retrieve or assign coordinate names for classes in sp
coordnames<-,Polygons,character-method retrieve or assign coordinate names for classes in sp
coordnames<-,SpatialGrid,character-method retrieve or assign coordinate names for classes in sp
coordnames<-,SpatialGrid,character-method retrieve or assign coordinate names for classes in sp
coordnames<-,SpatialLines,character-method retrieve or assign coordinate names for classes in sp
coordnames<-,SpatialPixels,character-method retrieve or assign coordinate names for classes in sp
coordnames<-,SpatialPixels,character-method retrieve or assign coordinate names for classes in sp
coordnames<-,SpatialPoints,character-method retrieve or assign coordinate names for classes in sp
coordnames<-,SpatialPolygons,character-method retrieve or assign coordinate names for classes in sp
CRS Class "CRS" of coordinate reference system arguments
CRS-class Class "CRS" of coordinate reference system arguments
CRSargs Class "CRS" of coordinate reference system arguments

-- D --

dd2dms Convert character vector to DMS-class object
degAxis axis with degrees
dim.SpatialGridDataFrame Class "SpatialGridDataFrame"
dim.SpatialLinesDataFrame a class for spatial lines with attributes
dim.SpatialPixelsDataFrame Class "SpatialPixelsDataFrame" ~~~
dim.SpatialPointsDataFrame Class "SpatialPointsDataFrame"
dim.SpatialPolygonsDataFrame Class "SpatialPolygonsDataFrame"
dimensions retrieve spatial dimensions from spatial data
dimensions,Spatial-method retrieve spatial dimensions from spatial data
DMS-class Class "DMS" for degree, minute, decimal second values

-- F --

flipHorizontal rearrange data in SpatialPointsDataFrame or SpatialGridDataFrame for plotting with spplot (levelplot/xyplot wrapper)
flipVertical rearrange data in SpatialPointsDataFrame or SpatialGridDataFrame for plotting with spplot (levelplot/xyplot wrapper)
fullgrid specify spatial data as being gridded, or find out whether they are
fullgrid<- specify spatial data as being gridded, or find out whether they are

-- G --

getGridIndex define spatial grid
getGridTopology define spatial grid
getLinesIDSlot Class "Lines"
getLinesLinesSlot Class "Lines"
getParUsrBB Class "Spatial"
getPolygonAreaSlot Class "SpatialPolygonsDataFrame"
getPolygonCoordsSlot Class "SpatialPolygonsDataFrame"
getPolygonHoleSlot Class "SpatialPolygonsDataFrame"
getPolygonLabptSlot Class "SpatialPolygonsDataFrame"
getPolygonsIDSlot Class "SpatialPolygonsDataFrame"
getPolygonsLabptSlot Class "SpatialPolygonsDataFrame"
getPolygonsplotOrderSlot Class "SpatialPolygonsDataFrame"
getPolygonsPolygonsSlot Class "SpatialPolygonsDataFrame"
getSLLinesIDSlots create objects of class SpatialLines or SpatialLinesDataFrame
getSLlinesSlot create objects of class SpatialLines or SpatialLinesDataFrame
getSpatialLinesMidPoints create objects of class SpatialLines or SpatialLinesDataFrame
getSpatialPolygonsLabelPoints create objects of class SpatialPolygons or SpatialPolygonsDataFrame
getSpPnHoles Class "SpatialPolygonsDataFrame"
getSpPnParts Class "SpatialPolygonsDataFrame"
getSpPplotOrderSlot Class "SpatialPolygonsDataFrame"
getSpPPolygonsIDSlots Class "SpatialPolygonsDataFrame"
getSpPPolygonsLabptSlots Class "SpatialPolygonsDataFrame"
getSpPpolygonsSlot Class "SpatialPolygonsDataFrame"
gridat Create N-S and E-W grid lines over a geographic region
gridded specify spatial data as being gridded, or find out whether they are
gridded,Spatial-method specify spatial data as being gridded, or find out whether they are
gridded-methods specify spatial data as being gridded, or find out whether they are
gridded<- specify spatial data as being gridded, or find out whether they are
gridlines Create N-S and E-W grid lines over a geographic region
gridparameters specify spatial data as being gridded, or find out whether they are
GridTopology define spatial grid
GridTopology-class Class "GridTopology" ~~~
gt Rlogo jpeg image

-- H --

HexPoints2SpatialPolygons Make SpatialPolygons object from GridTopology object

-- I --

IDvaluesGridTopology Make SpatialPolygons object from GridTopology object
IDvaluesSpatialPixels Make SpatialPolygons object from GridTopology object
image.SpatialGridDataFrame image gridded spatial data, or convert to format for image
image.SpatialPixelsDataFrame image gridded spatial data, or convert to format for image
image2Grid image gridded spatial data, or convert to format for image
is.projected Sets or retrieves projection attributes on classes extending SpatialData

-- L --

layout.north.arrow Plot methods for spatial data with attributes
layout.scale.bar Plot methods for spatial data with attributes
Line create objects of class Line or Lines
Line-class Class "Line"
LineLength create objects of class SpatialLines or SpatialLinesDataFrame
Lines create objects of class Line or Lines
Lines-class Class "Lines"
LinesLength create objects of class SpatialLines or SpatialLinesDataFrame

-- M --

makegrid sample point locations in (or on) a spatial object
mapasp Calculate aspect ratio for plotting geographic maps
mapLegendGrob Plot methods for spatial data with attributes
meuse Meuse river data set
meuse.grid Prediction Grid for Meuse Data Set
meuse.grid_ll Prediction Grid for Meuse Data Set, geographical coordinates
meuse.riv River Meuse outline

-- N --

nowrapSpatialLines Split SpatialLines components at offset

-- O --

overlay spatial overlay for points, grids and polygons
overlay,SpatialGrid,SpatialPoints-method Methods for spatially overlay-ing points (grids) and polygons layers
overlay,SpatialGridDataFrame,SpatialPoints-method Methods for spatially overlay-ing points (grids) and polygons layers
overlay,SpatialPixels,SpatialPoints-method Methods for spatially overlay-ing points (grids) and polygons layers
overlay,SpatialPixelsDataFrame,SpatialPoints-method Methods for spatially overlay-ing points (grids) and polygons layers
overlay,SpatialPoints,SpatialPolygons-method Methods for spatially overlay-ing points (grids) and polygons layers
overlay,SpatialPointsDataFrame,SpatialPolygons-method Methods for spatially overlay-ing points (grids) and polygons layers
overlay,SpatialPolygons,SpatialPoints-method Methods for spatially overlay-ing points (grids) and polygons layers
overlay-methods Methods for spatially overlay-ing points (grids) and polygons layers

-- P --

panel.gridplot panel and panel utility functions for spplot
panel.pointsplot panel and panel utility functions for spplot
panel.polygonsplot panel and panel utility functions for spplot
panel.spplot panel and panel utility functions for spplot
plot,Spatial,missing-method Class "Spatial"
plot,SpatialLines,missing-method a class for spatial lines
plot,SpatialPoints,missing-method Class "SpatialPoints" ~~~
plot,SpatialPolygons,missing-method Class "SpatialPolygons"
plot.SpatialGrid define spatial grid
plot.SpatialGridDataFrame Class "SpatialGridDataFrame"
plot.SpatialPixelsDataFrame Class "SpatialPixelsDataFrame" ~~~
point.in.polygon do point(s) fall in a given polygon?
points,SpatialPointsDataFrame-method Class "SpatialPointsDataFrame"
points2grid define spatial grid
Polygon create objects of class SpatialPolygons or SpatialPolygonsDataFrame
Polygon-class Class "Polygon"
Polygons create objects of class SpatialPolygons or SpatialPolygonsDataFrame
polygons sets spatial coordinates to create spatial data, or retrieves spatial coordinates
polygons,Spatial-method Retrieve polygons from SpatialPolygonsDataFrame object
polygons,SpatialPolygons-method Retrieve polygons from SpatialPolygonsDataFrame object
Polygons-class Class "Polygons"
polygons-methods Retrieve polygons from SpatialPolygonsDataFrame object
polygons<- sets spatial coordinates to create spatial data, or retrieves spatial coordinates
polygons<-,data.frame,SpatialPolygons-method Retrieve polygons from SpatialPolygonsDataFrame object
print.CRS Class "CRS" of coordinate reference system arguments
print.DMS Class "DMS" for degree, minute, decimal second values
print.SpatialPoints Class "SpatialPoints" ~~~
print.SpatialPointsDataFrame Class "SpatialPointsDataFrame"
print.summary.GridTopology Class "GridTopology" ~~~
print.summary.Spatial Class "Spatial"
print.summary.SpatialGrid Class "SpatialGrid" ~~~
print.summary.SpatialGridDataFrame Class "SpatialGridDataFrame"
print.summary.SpatialPixels Class "SpatialPixels" ~~~
print.summary.SpatialPixelsDataFrame Class "SpatialPixelsDataFrame" ~~~
proj4string Sets or retrieves projection attributes on classes extending SpatialData
proj4string<- Sets or retrieves projection attributes on classes extending SpatialData

-- R --

rbind.SpatialLines a class for spatial lines
rbind.SpatialLinesDataFrame a class for spatial lines with attributes
rbind.SpatialPixels Class "SpatialPixels" ~~~
rbind.SpatialPixelsDataFrame Class "SpatialPixelsDataFrame" ~~~
rbind.SpatialPoints Class "SpatialPoints" ~~~
rbind.SpatialPointsDataFrame Class "SpatialPointsDataFrame"
rbind.SpatialPolygons Class "SpatialPolygons"
rbind.SpatialPolygonsDataFrame Class "SpatialPolygonsDataFrame"
read.asciigrid read/write to/from (ESRI) asciigrid format
recenter Methods for Function recenter in Package 'sp'
recenter,Line-method Methods for Function recenter in Package 'sp'
recenter,Lines-method Methods for Function recenter in Package 'sp'
recenter,Polygon-method Methods for Function recenter in Package 'sp'
recenter,Polygons-method Methods for Function recenter in Package 'sp'
recenter,SpatialLines-method Methods for Function recenter in Package 'sp'
recenter,SpatialPolygons-method Methods for Function recenter in Package 'sp'
recenter-methods Methods for Function recenter in Package 'sp'
remove.duplicates find point pairs with equal spatial coordinates
Rlogo Rlogo jpeg image
row.names.SpatialLines a class for spatial lines
row.names.SpatialLinesDataFrame a class for spatial lines with attributes
row.names.SpatialPoints Class "SpatialPoints" ~~~
row.names.SpatialPointsDataFrame Class "SpatialPointsDataFrame"
row.names.SpatialPolygons Class "SpatialPolygons"
row.names.SpatialPolygonsDataFrame Class "SpatialPolygonsDataFrame"

-- S --

sample.Line sample point locations in (or on) a spatial object
sample.Polygon sample point locations in (or on) a spatial object
sample.Polygons sample point locations in (or on) a spatial object
sample.Sgrid sample point locations in (or on) a spatial object
sample.Spatial sample point locations in (or on) a spatial object
select.spatial select points spatially
setParUsrBB Class "Spatial"
show,CRS-method Class "CRS" of coordinate reference system arguments
show,DMS-method Class "DMS" for degree, minute, decimal second values
show,GridTopology-method Class "GridTopology" ~~~
show,SpatialGrid-method Class "SpatialGrid" ~~~
show,SpatialGridDataFrame-method Class "SpatialGridDataFrame"
show,SpatialPixels-method Class "SpatialPixels" ~~~
show,SpatialPixelsDataFrame-method Class "SpatialPixelsDataFrame" ~~~
show,SpatialPoints-method Class "SpatialPoints" ~~~
show,SpatialPointsDataFrame-method Class "SpatialPointsDataFrame"
show,summary.GridTopology-method Class "GridTopology" ~~~
ShowSpatialPointsDataFrame Class "SpatialPointsDataFrame"
sp A package providing classes and methods for spatial data: points, lines, polygons and grids
sp.grid panel and panel utility functions for spplot
sp.lines panel and panel utility functions for spplot
sp.points panel and panel utility functions for spplot
sp.polygons panel and panel utility functions for spplot
sp.text panel and panel utility functions for spplot
sp.theme Plot methods for spatial data with attributes
Spatial Class "Spatial"
Spatial-class Class "Spatial"
SpatialGrid define spatial grid
SpatialGrid define spatial grid
SpatialGrid-class Class "SpatialGrid" ~~~
SpatialGridDataFrame define spatial grid with attribute data
SpatialGridDataFrame-class Class "SpatialGridDataFrame"
SpatialLines create objects of class SpatialLines or SpatialLinesDataFrame
SpatialLines-class a class for spatial lines
SpatialLinesDataFrame create objects of class SpatialLines or SpatialLinesDataFrame
SpatialLinesDataFrame-class a class for spatial lines with attributes
SpatialLinesLengths create objects of class SpatialLines or SpatialLinesDataFrame
SpatialPixels define spatial grid
SpatialPixels-class Class "SpatialPixels" ~~~
SpatialPixelsDataFrame define spatial grid with attribute data
SpatialPixelsDataFrame-class Class "SpatialPixelsDataFrame" ~~~
SpatialPoints create objects of class SpatialPoints or SpatialPointsDataFrame
SpatialPoints-class Class "SpatialPoints" ~~~
SpatialPointsDataFrame create objects of class SpatialPoints or SpatialPointsDataFrame
SpatialPointsDataFrame-class Class "SpatialPointsDataFrame"
SpatialPolygons create objects of class SpatialPolygons or SpatialPolygonsDataFrame
SpatialPolygons-class Class "SpatialPolygons"
SpatialPolygonsDataFrame create objects of class SpatialPolygons or SpatialPolygonsDataFrame
SpatialPolygonsDataFrame-class Class "SpatialPolygonsDataFrame"
SpatialPolygonsRescale panel and panel utility functions for spplot
spChFIDs change feature IDs in spatial objects
spChFIDs,SpatialLines,character-method change feature IDs in spatial objects
spChFIDs,SpatialLinesDataFrame,character-method change feature IDs in spatial objects
spChFIDs,SpatialPolygons,character-method change feature IDs in spatial objects
spChFIDs,SpatialPolygonsDataFrame,character-method change feature IDs in spatial objects
spChFIDs-methods change feature IDs in spatial objects
spDists Euclidean or Great Circle distance between points
spDistsN1 Euclidean or Great Circle distance between points
spmap.to.lev rearrange data in SpatialPointsDataFrame or SpatialGridDataFrame for plotting with spplot (levelplot/xyplot wrapper)
spplot Plot methods for spatial data with attributes
spplot,SpatialGridDataFrame-method Plot methods for spatial data with attributes
spplot,SpatialLinesDataFrame-method Plot methods for spatial data with attributes
spplot,SpatialPixelsDataFrame-method Plot methods for spatial data with attributes
spplot,SpatialPointsDataFrame-method Plot methods for spatial data with attributes
spplot,SpatialPolygonsDataFrame-method Plot methods for spatial data with attributes
spplot-methods Plot methods for spatial data with attributes
spplot.grid Plot methods for spatial data with attributes
spplot.key panel and panel utility functions for spplot
spplot.locator Plot methods for spatial data with attributes
spplot.points Plot methods for spatial data with attributes
spplot.polygons Plot methods for spatial data with attributes
spsample sample point locations in (or on) a spatial object
spsample,Line-method sample point locations in (or on) a spatial object
spsample,Lines-method sample point locations in (or on) a spatial object
spsample,Polygon-method sample point locations in (or on) a spatial object
spsample,Polygons-method sample point locations in (or on) a spatial object
spsample,Spatial-method sample point locations in (or on) a spatial object
spsample,SpatialGrid-method sample point locations in (or on) a spatial object
spsample,SpatialLines-method sample point locations in (or on) a spatial object
spsample,SpatialPixels-method sample point locations in (or on) a spatial object
spsample,SpatialPolygons-method sample point locations in (or on) a spatial object
spsample-methods sample point locations in (or on) a spatial object
stack.SpatialGridDataFrame rearrange data in SpatialPointsDataFrame or SpatialGridDataFrame for plotting with spplot (levelplot/xyplot wrapper)
stack.SpatialPointsDataFrame rearrange data in SpatialPointsDataFrame or SpatialGridDataFrame for plotting with spplot (levelplot/xyplot wrapper)
summary,GridTopology-method Class "GridTopology" ~~~
summary,Spatial-method Class "Spatial"
summary,SpatialGrid-method Class "SpatialGrid" ~~~
summary,SpatialLines-method a class for spatial lines
summary,SpatialPixels-method Class "SpatialPixels" ~~~
summary,SpatialPoints-method Class "SpatialPoints" ~~~
summary,SpatialPolygons-method Class "SpatialPolygons"
summary.SpatialPoints Class "SpatialPoints" ~~~

-- W --

write.asciigrid read/write to/from (ESRI) asciigrid format

-- Z --

zerodist find point pairs with equal spatial coordinates
zerodist2 find point pairs with equal spatial coordinates

-- misc --

[,SpatialGrid-method Class "SpatialGrid" ~~~
[,SpatialGridDataFrame-method Class "SpatialGridDataFrame"
[,SpatialLines-method a class for spatial lines
[,SpatialLinesDataFrame-method a class for spatial lines with attributes
[,SpatialPixels-method Class "SpatialPixels" ~~~
[,SpatialPixelsDataFrame-method Class "SpatialPixelsDataFrame" ~~~
[,SpatialPoints-method Class "SpatialPoints" ~~~
[,SpatialPointsDataFrame-method Class "SpatialPointsDataFrame"
[,SpatialPolygons-method Class "SpatialPolygons"
[,SpatialPolygonsDataFrame-method Class "SpatialPolygonsDataFrame"
[[,Spatial,ANY,missing-method Class "Spatial"
[[<-,Spatial,ANY,missing-method Class "Spatial"