create a 3d shapefile ?
Thanks, this is what seemed to me, but the following phrase from the sp pdf "The classes document where the spatial location information resides, for 2D or 3D data" and some scattered info such as http://gis.stackexchange.com/questions/43342/how-to-use-z-coordinate-in-qgis http://grokbase.com/t/r/r-sig-geo/127s88jzc6/problem-extracting-z-value-from-line-shapefile make me think that some support for x,y,x coordinates actually exists in sp and perhaps writeOGR() could have taken advantage of it. I've got very good advice on how to create the 3d shapefiles using simple python scripting in the qgis list, I insert the link: http://osgeo-org.1560.n6.nabble.com/create-3d-shapefile-and-or-GPX-tp5040855p5040863.html Agus
On Sat, Mar 16, 2013 at 2:00 PM, Michael Sumner <mdsumner at gmail.com> wrote:
It is not possible. Cheers, Mike On Saturday, March 16, 2013, Agustin Lobo wrote:
Is it possible to write point ESRI shapefiles with x,y,z coordinates using writeOGR()? According to what I've been able to find, it seems that spatial points can have 3 coordinates while spatial lines cannot. Nevertheless, coordinates() accepts 2 arguments (x,y) only. So actually, do not know how to define x,y,z coordinates for spatial points (data frame) objects. Is it possible? Thanks, Agus
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Michael Sumner
Hobart, Australia
e-mail: mdsumner at gmail.com
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