Thanks for all of your responses...<div>we're a trying some of your suggestions, using some tools to accomplish this task.</div><div>I think we're close enough now. (the polygon shapefile is almost correctly generated from a shape with a bunch of lines which compose closed boundaries of polygons).</div>
<div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Nov 26, 2012 at 2:53 PM, Joaquim Luis <span dir="ltr"><<a href="mailto:jluis@ualg.pt" target="_blank">jluis@ualg.pt</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

  
    
  
  <div bgcolor="#FFFFFF" text="#000000">
    GMT5 has a tool called gmtstitch that could perhaps help doing the
    job, but I never played enough with it to be more positive about its
    capacities.<span class="HOEnZb"><font color="#888888"><br>
    <br>
    Joaquim</font></span><div><div class="h5"><br>
    <br>
    <blockquote type="cite">I want a command line tool to do the same thing that
      "Feature to Polygon" of ArcGIS or Polygonizer plugin of Quantum
      GIS does. Is there any tool for this?<br>
      <br>
      <div class="gmail_quote">2012/11/26 Peter Halls <span dir="ltr"><<a href="mailto:p.halls@york.ac.uk" target="_blank">p.halls@york.ac.uk</a>></span><br>
        <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Alisson,
          Hugo,<br>
          <br>
               I think a reason for the lack of response is that the
          operation<br>
          you need is a tad more involved than is supported by ogr2ogr -
          which<br>
          performs simple geometrical operations but is really designed
          to<br>
          perform format translations.<br>
          <br>
              To go from a spaghetti of lines to polygons requires the<br>
          identification of each future polygon boundary, the assembly
          of the<br>
          polygon boundary, ensuring that it closes and writing out the
          new<br>
          polygon.  This much ogr2ogr does.  To go to multipolygons,
          however,<br>
          requires the further assembly of the related polygons into a
          combined<br>
          polygon - for example, islands in a lake.  All of this relies
          on the<br>
          existence of attribute values to identify what belongs to
          what.<br>
          Further complication is involved if the resultant polygons
          overlap and<br>
          it is required that these overlaps be identified, although
          this is not<br>
          required for a polygon shapefile.<br>
          <br>
              As this process may require intelligence based upon more
          complex<br>
          attribute relationships, it is probably the case that a
          program<br>
          (Python, Java, C++, etc) is required to implement the specific
          logic<br>
          required.<br>
          <br>
              If you want to read up on the operations involved, one of
          the most<br>
          approachable texts is 'GIS Basics' by Steve Wise (Taylor &
          Francis,<br>
          2002).  The good news is that there are calls in the OGR API
          to<br>
          implement each of the steps involved.<br>
          <br>
          Best wishes,<br>
          <br>
          Peter<br>
          <div>
            <div><br>
              On 26 November 2012 12:24, Hugo Benicio <<a href="mailto:hbobenicio@gmail.com" target="_blank">hbobenicio@gmail.com</a>>
              wrote:<br>
              > I'm facing a similar problem when trying to convert a
              shapefile containing<br>
              > lines to a shapefile containing polygons.<br>
              > No progress.<br>
              > If you solve it, please, let me know!<br>
              ><br>
              > Thanks in advance.<br>
              ><br>
              ><br>
              > On Mon, Nov 26, 2012 at 8:47 AM, Alisson Barbosa <<a href="mailto:alisson.uece@gmail.com" target="_blank">alisson.uece@gmail.com</a>><br>
              > wrote:<br>
              >><br>
              >> Can anybody help me?<br>
              >><br>
              >><br>
              >> 2012/11/23 Alisson Barbosa <<a href="mailto:alisson.uece@gmail.com" target="_blank">alisson.uece@gmail.com</a>><br>
              >>><br>
              >>> Hi friends,<br>
              >>><br>
              >>> I would like to transform a shape with
              multilinestring in a shape with<br>
              >>> polygons using ogr2ogr.<br>
              >>><br>
              >>> Polygon to multilinestring, I use:<br>
              >>> ogr2ogr -f "ESRI Shapefile" -overwrite
              "C:/Users/Alisson/Basins3.shp"<br>
              >>> "C:/Users/Alisson/Basins2.shp" -sql "SELECT *
              FROM Basins2" -skipfailures<br>
              >>> -nlt MULTILINESTRING<br>
              >>><br>
              >>> This works.<br>
              >>><br>
              >>> Multilinestring to multipolygon, I use:<br>
              >>> ogr2ogr -f "ESRI Shapefile" -overwrite
              "C:/Users/Alisson/polygon.shp"<br>
              >>> "C:/Users/AlissonContorno30.shp" -sql "SELECT
              * FROM Contorno30"<br>
              >>> -skipfailures -nlt MULTIPOLYGON<br>
              >>><br>
              >>> But, this error appears:<br>
              >>> ERROR 1: Attempt to write non-polygon
              (LINESTRING) geometry to POLYGON<br>
              >>> type shapefile.<br>
              >>><br>
              >>> Can you help me?<br>
              >>><br>
              >>> Best regards,<br>
              >>> --<br>
              >>> Alisson Barbosa<br>
              >>> Systems Analyst - FUNCEME<br>
              >>> M.Sc. in Computer Science - MACC<br>
              >>> Graduate in Computer Science  - UECE<br>
              >>><br>
              >>><br>
              >><br>
              >><br>
              >><br>
              >> --<br>
              >> Alisson Barbosa<br>
              >> Systems Analyst - FUNCEME<br>
              >> M.Sc. in Computer Science - MACC<br>
              >> Graduate in Computer Science  - UECE<br>
              >><br>
              >><br>
              >><br>
              >> _______________________________________________<br>
              >> gdal-dev mailing list<br>
              >> <a href="mailto:gdal-dev@lists.osgeo.org" target="_blank">gdal-dev@lists.osgeo.org</a><br>
              >> <a href="http://lists.osgeo.org/mailman/listinfo/gdal-dev" target="_blank">http://lists.osgeo.org/mailman/listinfo/gdal-dev</a><br>
              ><br>
              ><br>
              ><br>
              > _______________________________________________<br>
              > gdal-dev mailing list<br>
              > <a href="mailto:gdal-dev@lists.osgeo.org" target="_blank">gdal-dev@lists.osgeo.org</a><br>
              > <a href="http://lists.osgeo.org/mailman/listinfo/gdal-dev" target="_blank">http://lists.osgeo.org/mailman/listinfo/gdal-dev</a><br>
              <br>
              <br>
              <br>
            </div>
          </div>
          <span><font color="#888888">--<br>
----------------------------------------------------------------------------------------------------------------<br>
              Peter J Halls, GIS Advisor & Team Leader Applications
              Support and Training,<br>
                             Information Directorate, University of York<br>
              Telephone: 01904 323806     Fax: 01904 323740<br>
              Snail mail: Harry Fairhurst Building, University of York,<br>
                              Heslington, York YO10 5DD<br>
              This message has the status of a private and personal
              communication<br>
----------------------------------------------------------------------------------------------------------------<br>
            </font></span></blockquote>
      </div>
      <br>
      <br clear="all">
      <br>
      -- <br>
      Alisson Barbosa
      <div>Systems Analyst - FUNCEME
        <div><span lang="en"><span title="Clique para mostrar traduções
              alternativas">M.Sc. in Computer Science</span><span title="Clique para mostrar traduções alternativas"> - MACC</span></span>
          <div>
            <div>Graduate in Computer Science  - UECE</div>
          </div>
        </div>
        <br>
      </div>
      <br>
      <br>
      <fieldset></fieldset>
      <br>
      <pre>_______________________________________________
gdal-dev mailing list
<a href="mailto:gdal-dev@lists.osgeo.org" target="_blank">gdal-dev@lists.osgeo.org</a>
<a href="http://lists.osgeo.org/mailman/listinfo/gdal-dev" target="_blank">http://lists.osgeo.org/mailman/listinfo/gdal-dev</a></pre>
    </blockquote>
    <br>
  </div></div></div>

<br>_______________________________________________<br>
gdal-dev mailing list<br>
<a href="mailto:gdal-dev@lists.osgeo.org">gdal-dev@lists.osgeo.org</a><br>
<a href="http://lists.osgeo.org/mailman/listinfo/gdal-dev" target="_blank">http://lists.osgeo.org/mailman/listinfo/gdal-dev</a><br></blockquote></div><br></div>