<div>1.- You have to transform the vector information to a rast layer, you can do it using the comand v.to.rast, baut before you have to determine the cell resolution using for example g.region res=meters</div> <div> </div> <div>2.- If you wsnt to create a good DEM you have to change the units of the rast layer created, Only have to convert this layer from meter to centimeter using r,mapcalc 'cm_layer=rast_meter*100.00'. That's for obtain a good relation betwen horizontal and vertical resolution.</div> <div> </div> <div>3.- Now you have to use an interpolatión method to create a DEM continous surface. There are several methods, the commonest is r.surf.contour tat use a lineal interpolation. If you use this command you must use the option -f and it'll build faster, dont forget this point!!!!</div> <div> </div> <div>4.- Finally you have to transform the results to the correct units usin r.mapcalc 'final_DEM=cm_DEM/100.00'</div> <div> </div>
<div> </div> <div>If you want to generate a DEM usin another interpolation methods please ask!!</div> <div> </div> <div>Sorry for my english</div> <div> </div> <div>Juanma<BR><BR><B><I>megha shyam <capt_lms@yahoo.co.in></I></B> escribió:</div> <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid"> <DIV>Please help me in creation of DEM.i have a vector layer contaning contour information.How to create a DEM model of this.Can you tell me the stpes to be followed</DIV> <DIV> </DIV> <DIV>shyam</DIV> <DIV> </DIV> <div> <HR SIZE=1> </HR>Here’s a new way to find what you're looking for - <A href="http://us.rd.yahoo.com/mail/in/yanswers/*http://in.answers.yahoo.com/">Yahoo! Answers</A> _______________________________________________<BR>grassuser mailing list<BR>grassuser@grass.itc.it<BR>http://grass.itc.it/mailman/listinfo/grassuser<BR></BLOCKQUOTE><BR><p> 
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