What about using grass 6 and the command r.to.vect - you can do this
from R with the package spgrass6
Rainer
Milton Cezar Ribeiro wrote:
Dear Roger,
I am simulating some analyzes on R, and the output are a lot of AscGrid
(raster) maps. After generate these maps (about 1,000 of them), I need convert
these maps to vector (shapefiles) format, because I need join some attributes
to each feature (polygon). I can do it on ArcGis, and use the spatial analyst
extentention, and convert one by one, but unfortunately as I have 1,000 maps,
it is so time consuming.
I thougth that there are some package/function on R that vectorize a raster
(ascGrid) format.
Any ideas?
miltinho
----- Mensagem original ----
De: Roger Bivand <[EMAIL PROTECTED]>
Para: Milton Cezar Ribeiro <[EMAIL PROTECTED]>; [EMAIL PROTECTED]
Enviadas: Quarta-feira, 20 de Junho de 2007 17:29:16
Assunto: ODP: [R-sig-Geo] Generating vetor (shapefiles) in R
Grids are not vector format - you could coerce the SpatialGridDataFrame to a
SpatialPointsDataFrame, but is this the kind of output you need? SpatialPixels
can also be coerced to SpatialPolygons rectangles, but what you do will depend
on your needs.
Roger
--- Roger Bivand, NHH, Helleveien 30, N-5045 Bergen, [EMAIL PROTECTED]
Od: [EMAIL PROTECTED] w imieniu Milton Cezar Ribeiro
Wys�©Èano: �ªÜr 20.06.2007 16:28
Do: r-sig-geo@stat.math.ethz.ch
Temat: [R-sig-Geo] Generating vetor (shapefiles) in R
Hi there,
I need to convert a raster (ascGrid) format to Shape files.
Is there a way of to do that on R?
Kind regards
miltinho
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