Hi Hanlie, I am getting out of my depth here, and might be leading you astray...
But I had a little challenge a few months ago, wanting to generate points along a line to then use to create other tangent lines (in science terms, generating belt-transects across a gully, at randomly defined distances from start of gully)... sounds vaguely like a simpler version of what you're doing. I used a combo of v.segment, v.type_wrapper.sh,... and some beginner fumbling... from your initial post, I'm guessing you've already got these under your belt? If your current hurdle is getting a new column into the table for the river segments layer, from info in the points layer, could you achieve this by working directly with the tables (database)? rather than a GRASS command?? Do you have some linking field between the points and the segments layers (e.g. segment_cat)? if you do, or can make one, could you e.g.: SELECT (start_node_name\ end_node_name) AS segment_name FROM points_layer_table and update this to the river segment table?? UPDATE river_segment_table SET new_column_for_label=segment_name WHERE river_segment_table.segment_cat=points_layer.segment_cat ##note this isn't gramatically correct SQL... just an idea.. Please excuse crude SQL example, I'm still dusting off my old MSACCESS knowledge and 'converting' it to Postgresql... You can probably get a select/update process in one easy step with the right SQL sweet-talking? If i'm off track, apologies for misleading you ;-) if you get something out of it, i might promote myself from "complete novice" at sql to "someone that knows just enough to break things" Regards, Shane. _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user