SPGDF2matrix

object of class <a href="/link/SpatialGridDataFrame?package=RgoogleMaps&version=1.1.9.3&to=sp" rd-options="sp" data-mini-rdoc="sp::SpatialGridDataFrame">SpatialGridDataFrame</a>

column number of x-coordinate, in the coordinate matrix

xcol

column number of y-coordinate, in the coordinate matrix

ycol

columns names or numbers given instead of the <code>attr</code> argument when the data represent an image encoded in three colour bands on the 0-255 integer scale; all three columns must be given in this case, and the attribute values will be constructed 

red,green,blue

logical; should coordinate axes be drawn?

axes

xlim

ylim

logical; if FALSE, the image is added to the plot layout setup
by <code>plot(as(x, "Spatial"),axes=axes,xlim=xlim,ylim=ylim,asp=asp)</code>
which sets up axes and plotting region; if TRUE, the image is added
to the existing plot.

PLOT

arguments passed to <a href="/link/image?package=RgoogleMaps&version=1.1.9.3" rd-options="" data-mini-rdoc="RgoogleMaps::image">image</a>, see examples

default FALSE, see <code><a href="/link/Spatial-class?package=RgoogleMaps&version=1.1.9.3&to=sp" rd-options="sp" data-mini-rdoc="sp::Spatial-class">Spatial-class</a></code> for further details

setParUsrBB

This is a modification/ripoff from as.image.SpatialGridDataFrame() in package sp.
    It merely serves to convert an object of type SpatialGridDataFrame to a matrix

This package serves two purposes: (i) Provide a
        comfortable R interface to query the Google server for static
        maps, and (ii) Use the map as a background image to overlay
        plots within R. This requires proper coordinate scaling. NOTE:
        To do anything but downloading static map tiles, RgoogleMaps
        needs EITHER rgdal OR ReadImages OR rimage installed ! Such an
        OR dependency is difficult to express in the Depends field, so
        I moved those packages to suggested. rgdal is your package if
        you prefer png file format and ReadImages or rimage if you
        prefer jpg format. In the latter cases, you will also need the
        libjpeg library installed.

SPGDF2matrix: image gridded spatial data, or convert to format for image

Description

Usage

Arguments

Value