As a workaround, and assuming you can make your way around PostGIS, the following might do what you're looking for:
http://postgis.refractions.net/docs/ST_MakeLine.html quote: Examples: Spatial Aggregate version This example takes a sequence of GPS points and creates one record for each gps travel where the geometry field is a line string composed of the gps points in the order of the travel. SELECT gps.gps_track, ST_MakeLine(gps.the_geom) As newgeom FROM (SELECT gps_track,gps_time, the_geom FROM gps_points ORDER BY gps_track, gps_time) As gps GROUP BY gps.gps_track Brendan Quoting Declan Troy <[email protected]>: > Hey Richard, > > Thanks for the response. Indeed fTools was the first place I looked > as it seemed the type of functionality that might be there. Perhaps > some day, or maybe in the rumored Ecological toolbox? > > Seemed like the type of operation that many users might have cause to > use so I was hoping there was an easy way I was just overlooking but > perhaps I misjudged. Once I get around to learning to write python > plugins this should be a nice project to start on. Until then I can > do this outside of QGIS, I'm just periodically attempting to see how > far I can get in the hopes of shifting over. Each version keeps > getting better. > > Declan > > > On Nov 9, 2009, at 6:19 AM, Richard Duivenvoorde wrote: > > > > >> Is there a mean in QGIS to convert a series of points to a polyline? > >> I would like to create some tracklines from series of telemetry > >> points to summarize movement/migration paths. I hope I've overlooked > >> something but the commands I see tend to be dissolution rather than > >> aggregation of features. > > > > Hi Declan, > > > > don't know a tool like that (but I'm not authorative for that...), > > but the > > first thing I think of is the fTools-functionality of Carson Farmer > > (in > > Vector menu of Qgis). It already does things like that. Maybe it's > > worth a > > feature request to him? > > > > Another option would be to write a python plugin for it? Or add it > > to the > > plugin-wishes list if you do not want to do it yourself: > > http://www.qgis.org/wiki/Vector_Support_Wishes > > > > Regards, > > > > Richard Duivenvoorde > > > > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user > _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
