[R-sig-Geo] Writing SpatialPolygonsDataFrame object to an ESRI Shape File format? `

[Roger Bivand]

On Wed, 21 Dec 2005, Rick Reeves wrote:

> Thanks for earlier help finding the new SpatialPolygons classes..
> My final (for now) question, that I can't answer from various
> documents is:
> 
> How to write my SpatialxxxxDataFrame object to an ESRI Shape File?
> 
> the previous method I used was:
> 
> writeSRDFShape(SRDF, OutputShapeFileRoot)
> 
> I have both a SpatialPolygon and SpatialPolygonDataFrame objects to use
> as input...

The functions are wrappers in maptools using sp classes, but because 
shapefiles have to have dbf, the easy wrapper takes a 
SpatialPolygonDataFrame object:

writePolyShape(obj, file="whatever")

with reading now being readShapePoly()

We haven't managed to write a correct *.prj file yet, but would like to - 
I think the code is in GDAL and PROJ.4 with examples in GRASS, but I 
haven't done it - help would be welcome!

Best wishes,

Roger

> 
> Thanks, RR
> 
> 

-- 
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