Hugo Benicio <hbobenicio <at> gmail.com> writes: > > > I'm facing a similar problem when trying to convert a shapefile containing lines to a shapefile containing polygons. > No progress. > If you solve it, please, let me know! > > Thanks in advance.
Hi, Converting polygons into lines and lines into polygons are not symmetric operations. While it is always possible to snip the polygon rings and tell that they are lines it is not the case in other direction. All lines or polylines do not form closed rings which can be converted into polygons, they do not necessarily even touch. Therefore I would not be surprised if ogr2ogr is missing such a tool. I do not know, though. There seems to be special tools for building polygons. OpenJUMP has a few and Sextante (which is integrated with OpenJUMP, Kosmo GIS, gvSIG, QGIS and probably others) seems to have such a function. I think also that some planar graph tools could be suitable for this task. I bet that GRASS has fine tools for building topology and polygons. -Jukka Rahkonen- _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
