<HTML><BODY DEFANGED_STYLE="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">Hi, List--<DIV><BR class="khtml-block-placeholder"></DIV><DIV>I'm hoping someone can take a few minutes and explain what build.polyline actually does? What is this command supposed to do and how does it accomplish it?</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>I've read the Help documentation about the command but it does not go into enough detail to help me understand what results I can expect from it.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><FONT class="Apple-style-span" face="Verdana">When I use build.polyline, the resulting file carries none of the attribute information (including street name) from the original map layer. I would expect that it joins line segments and preserves all non-unique attributes. I would expect that a new .dbf file would be created if I use build.polyline on shapefile data I've imported into Grass.</FONT></DIV><DIV><FONT class="Apple-style-span" face="Verdana"><BR class="khtml-block-placeholder"></FONT></DIV><DIV><FONT class="Apple-style-span" face="Verdana">The menu interface for build.polyline does not provide any options, such as controlling what attributes are used to join the line segments. Is there another way of setting up the command to make it join segments based on selected attributes?</FONT></DIV><DIV><FONT class="Apple-style-span" face="Verdana"><BR class="khtml-block-placeholder"></FONT></DIV><DIV><FONT class="Apple-style-span" face="Verdana"> Steven Gordon</FONT></DIV></BODY></HTML>