Thanks. I have not mistyped column name. In GRASS 7 that is what you get. On Mon, Jan 14, 2013 at 12:38 PM, Maris Nartiss <[email protected]> wrote:
> As it says. You have mistyped column name. Check column name and then try > again. > > Still in Your case I would try to interpolate with v.surf.rst first > and then use result for analysis. > > Maris. > > 2013/1/13 Brian Sanjeewa Rupasinghe <[email protected]>: > > Hi Maris, > > > > Many thanks for the advice. Further, i am going to use r.surf.contour to > > generate a raster elevation DEM for viewshed analysis. The grass vector > > contour layer that i have needs to be converted to raster contour. For > this > > i tried using v.to.rast function. Elevation field of contour layer is; > > EL_Elevati which is a double precision data type. Following are the > > parameters i used: > > > > v.to.rast input = terrain@topo1K type = line output = rasterCont > use=attr > > attrcolumn = EL_Elevati labelcolumn = cat > > > > However, when i run this it gives following error: > > > > dbmi: protocol error > > ERROR: Column <EL_Elevati> not found > > > > Any suggestion on this is appreciated. > > > > Cheers, Brian. > > > > > > On Sun, Jan 13, 2013 at 2:10 PM, Maris Nartiss <[email protected]> > wrote: > >> > >> Hello, > >> there are two options: > >> 1st - join both datasets into single one (GRASS vectors can contain > >> different geometries in single vector dataset) and use v.surf.rst (it > >> will use both line and point data) > >> 2nd - convert lines to points with v.to.points and then join into > >> single point dataset. Interpolate with any tool. > >> > >> Good luck, > >> Maris. > >> > >> 2013/1/12 Brian Sanjeewa Rupasinghe <[email protected]>: > >> > Hi all, > >> > > >> > have two shape files containing height information of a certain area. > >> > One > >> > file consists of height information in contours (isolines) and the > >> > othesr > >> > file consists of height information with spot heights. In order to > >> > create a > >> > complete DEM i need heights of both layers. I need to create a raster > >> > DEM > >> > with winGRASS 7 using these information. What would be the best > >> > technique to > >> > generate raster DEM with these two types of data? Do i need to > generate > >> > some > >> > spot heights from contours and then integerate with existing spot > >> > heights > >> > for DEM generation or any other method? > >> > > >> > Cheers, Brian > >> > > >> > _______________________________________________ > >> > grass-user mailing list > >> > [email protected] > >> > http://lists.osgeo.org/mailman/listinfo/grass-user > >> > > > > > >
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