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\name{GridTopology-class}
\docType{class}
\alias{GridTopology-class}
\alias{print.summary.GridTopology}
\alias{summary,GridTopology-method}
\alias{show,GridTopology-method}
\alias{show,summary.GridTopology-method}
\alias{coerce,GridTopology,data.frame-method}
\alias{coerce,SpatialGrid,GridTopology-method}
\alias{coerce,SpatialPixels,GridTopology-method}
\title{Class "GridTopology" }
\description{ class for defining a rectangular grid of
arbitrary dimension }
\section{Objects from the Class}{
Objects are created by using e.g.
GridTopology(c(0,0), c(1,1), c(5,5))
see \link{SpatialGrid}
}
\section{Slots}{
\describe{
\item{\code{cellcentre.offset}:}{numeric; vector with the smallest centroid coordinates for
each dimension; coordinates refer to the cell centre }
\item{\code{cellsize}:}{numeric; vector with the cell size in each dimension}
\item{\code{cells.dim}:}{integer; vector with number of cells in each dimension}
}
}
%\section{Extends}{
% Class \code{"Spatial"}, by class \code{"SpatialPoints"}.
%}
\section{Methods}{
\describe{
\item{coordinates}{\code{signature(x = "SpatialGrid")}: calculates coordinates for
each point on the grid}
\item{summary}{\code{signature(object = "SpatialGrid")}: summarize object}
\item{coerce}{\code{signature(from = "GridTopology", to = "data.frame")}:
convert to data.frame with columns cellcentre.offset, cellsize and cells.dim}
}
}
\author{ Edzer Pebesma, \email{edzer.pebesma@uni-muenster.de} }
\seealso{
\code{\link{SpatialGridDataFrame-class}}, \code{\link{SpatialGrid-class}}
}
\examples{
x = GridTopology(c(0,0), c(1,1), c(5,5))
class(x)
x
summary(x)
coordinates(x)
y = SpatialGrid(grid = x)
class(y)
y
}
\keyword{classes}
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