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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