can you send me a small example dataset? ..ede On 13.09.2016 13:08, Rahkonen Jukka (MML) wrote: > Hi, > > I play with GPS track points and there are thousands of points. Concatenating > attributes does not make sense. Picking attributes from the first point would > do, or just drop all the attributes. > Converting to multipoint and then into linestring gives a funny result with > zig-zagging line that is not usable to anything, if not as a decoration. > > -Jukka- > > edgar soldin wrote: > >> how do you expect the attributes to be concatenated in the resulting >> linestring? > >> did you try joining them to a multipoint and convert that to linestring? > >> ..ede > >> On 13.09.2016 09:45, Rahkonen Jukka (MML) wrote: >>> Hi, >>> >>> I have some point data which I would like to convert into linestrings. >>> Points are ordered correctly in the file but they have also useful IDs. I >>> don't find a readymade tool for this task but I have a feeling that it >>> should not be so hard to do with a little beanshell script. This might suit >>> even as an option for the Convert Selected Geometries/Layers tool as >>> Points->LineString but I know from practice that it is rather uncommon that >>> point layers are properly ordered. >>> >>> This is how I do it with SQL and Spatialite >> >>> select makeline(a.geometry) from >>> (select id,geometry from track_points_geometries order by id) a; >>> >>> -Jukka Rahkonen- >>> >> >> >> >> >> >> >> >> ------------------------------------------------------------------------------ >> >> >> >> _______________________________________________ >> Jump-pilot-devel mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel >> > > ------------------------------------------------------------------------------ > _______________________________________________ > Jump-pilot-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > > ------------------------------------------------------------------------------ > _______________________________________________ > Jump-pilot-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel >
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