<div>Hi Maning,</div>
<div> </div>
<div>Sometimes I have the same issue, but I don't solve this on vector.</div>
<div>Just supose you have a map where 1 is your raster-based-polygon</div>
<div>and NULL is outside of polygon. You can use r.mapcalc to</div>
<div>invert it, in the maner that 1 come to be your non-polygon, and</div>
<div>NULL your polygon. So you can run r.buffer with positive value</div>
<div>and at the end may be you need to do some kind of crossing</div>
<div>between original and output maps.</div>
<div> </div>
<div>Bests.</div>
<div> </div>
<div>miltinho<br><br></div>
<div class="gmail_quote">2009/10/29 maning sambale <span dir="ltr"><<a href="mailto:emmanuel.sambale@gmail.com">emmanuel.sambale@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">I tried using a negative values as<br>buffer=-3000 in v.buffer but it doesn't give me internal buffer in a<br>
polygon layer.<br><br>Any hints?<br><br>--<br>cheers,<br>maning<br>------------------------------------------------------<br>"Freedom is still the most radical idea of all" -N.Branden<br>wiki: <a href="http://esambale.wikispaces.com/" target="_blank">http://esambale.wikispaces.com/</a><br>
blog: <a href="http://epsg4253.wordpress.com/" target="_blank">http://epsg4253.wordpress.com/</a><br>------------------------------------------------------<br>_______________________________________________<br>grass-user mailing list<br>
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