[R-sig-Geo] ascii grid from arcgis

[Roger Bivand]

On Tue, 19 Jun 2007, Michael Sumner wrote:

> You ought to be able to read that using readGDAL (rgdal) which will
> return you a SpatialGridDataFrame.  You then have methods for image and
> spplot that will work:

Or for OSX users without rgdal, there is a simple readAsciiGrid() function 
in maptools to do the same.

Roger

>
>
> ## NOT TESTED:
> library(rgdal)
> asc <- "file.asc"  ## or whatever it is
> g <- readGDAL(asc)
>
> summary(g)
>
> image(g)
>
> ## OR
> spplot(g)
>
>
> ==============Original message text===============
> On Tue, 19 Jun 2007 5:29:35 +1000 Thomas Szegvary wrote:
>
> sorry for spamming all of you with my problems...but here's another one:
>
> I have ascii grids from ESRI ArcGIS in the following format:
> ncols         42
> nrows         36
> xllcorner     -10.311630235357
> yllcorner     35.110501339805
> cellsize      1
> NODATA_value  -9999
>
> Is there an already existing comand to plot that type of grid? or do I have to
> (re)define the grid?
>
> Thanks a lot for any help
> Thomas
>
> --
> Thomas Szegvary
> Environmental Geosciences
> University of Basel
> Bernoullistrasse 30
> CH-4056 Basel
> Switzerland
>
> Tel. ++41-61-267 04
> Fax. ++41-61-267 04 79
>
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>
> ===========End of original message text===========
>
>
>
> If it wasn't backed-up, then it wasn't important. ~ Anon sysadmin
>
> Mike Sumner (Phd. Candidate)
> http://www.antcrc.utas.edu.au/~mdsumner/ http://www.zoo.utas.edu.au/awru/  IASOS/AWRU
> University of Tasmania
> Private Bag 80
> Hobart Tasmania 7001
> AUSTRALIA
> Email: mdsumner at utas.edu.au
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>
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-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no