Message-ID: <alpine.LFD.2.20.1512011834280.14771@reclus.nhh.no>
Date: 2015-12-01T17:41:33Z
From: Roger Bivand
Subject: save SpatialPolygonsDataFrame as dxf file
In-Reply-To: <003f01d12c4c$494d89d0$dbe89d70$@stuba.sk>
On Tue, 1 Dec 2015, Milan Cisty wrote:
> Hello,
> I would like to save SpatialPolygonsDataFrame as dxf file. Sorry if I am
> doing trivial mistake, but please what is wrong on this:
>
> p = Polygon(coords = matrix(c(1,2,2,1,1,1,2,2), ncol = 2)) #this is
> square 1x1
> p1= Polygons(list(p), ID=1)
> p2=SpatialPolygons(list(p1))
> p3=SpatialPolygonsDataFrame(p2, data = as.data.frame("1"))
> writeOGR(p3, dsn = "square.dxf", layer = "entities", driver="DXF")
>
> and last command gave me following message:
> Error in writeOGR(p3, dsn = "square.dxf", layer = "entities", driver =
> "DXF") :
> Creating Name field failed
> (some dxf file was produced, but it has nothing drawn in it)
No idea, nor can I find any example of how to use the file creation
driver. This isn't a driver in active use anywhere really. I think that
the issue is that DXF doesn't want attributes associated with geometries -
to judge from copying p3 to GRASS and writing with v.out.dxf. writeOGR
needs attributes.
Roger
> Thanks,
> Milan
>
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--
Roger Bivand
Department of Economics, Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; fax +47 55 95 91 00
e-mail: Roger.Bivand at nhh.no