From grass-lists-owner@max.cecer.army.mil Mon Jan 24 08:49:58 1994
Date: Mon, 24 Jan 94 23:38:42 +0800
From: H. Y. Lin <hylin@ev004.ev.nctu.edu.tw>
Sender: grass-lists-owner@max.cecer.army.mil
Reply-To: grassu-list@max.cecer.army.mil
To: grassu-list@max.cecer.army.mil
Subject: vector(lines) to raster
Content-Length: 542Dear User:
I am new in Grass and have a stupid question. How to transfer Vector
map to Raster map which contains only lines ( just like rivers, roads).
I know there is a command called " v.to.rast" ,but it can't solve my problem.
Does anyone know how to do it?
Thank You Very Much| Hung-Yue Lin , Email:hylin@ev004.ev.nctu.edu.tw
| Institute of Environmental Engineering Voice:011-886-35-712121-2929
| National Chiao Tung University Voice:011-886-35-712171x2928
| Street: 75 Po-Ai Street, Hsinchu, Taiwan 30090, R.O.C.
I'm not sure why it won't solve your problem. If the lines have labels
attached to them (you can check in v.digit, or use d.what.vect), they
will be translated by v.to.rast.
The new raster map will contain strips of raster cells along that vector
line, of a size determined by the resolution of the region you are
in when you invoke v.to.rast.
If they are labeled, and you used v.to.rast, and it didn't seem to
work, try looking at your current region, or see if there is a mask
running. v.to.rast looks at both of these when it creates a new raster
file.
If there is some other difficulty that I did not understand you
can email me directly sue@ced.berkeley.edu
Sue Huse
CEDR - REGIS
University of California, Berkeley