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
