Michael, I would opt to use PostGIS as backend. Store your transects (from within QGIS for example) in a postgis table, add a trigger on this table, or view, and you'll have the data you need. Should work fluently. It's a single SQL you need to divide lines in 100 meter segments.
If you like working with python, Shapely could be an option too, they've also implemented some linear referencing methods ( http://toblerity.github.com/shapely/manual.html#linear-referencing-methods ) that could help. In case you've trouble finding the right SQL for postgis, drop me a mail, I have it somewhere. Additional fun is provided by ogr2ogr which should allow to extract PostGIS data directly to GPX files (never tested this). Andif you really need a challenge, install geoserver with the ogr2ogr WFS plugin, this should allow gpx export too... Kris On Sat, 2012-03-10 at 18:49 -0500, Jake Maier wrote: > Michael, > > What about a route? String 100m lines together in a route, You even > can tell the GPS when to notify you about the coming of a node which > will be the beginning of a new line. Because it’s nearly impossible to > hit a 1X1m square with the GPS, (it will constantly move on you) I use > this feature to let me know when I’m let’s say 10 m from the point and > then use a fixed amount of paces and the bearing to be fairly unbiased > in locating the point. > > jake > > > > From: qgis-user-boun...@lists.osgeo.org > [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Michael > Spencer > Sent: Saturday, March 10, 2012 5:02 PM > To: QGIS Users > Subject: [Qgis-user] GPS route > > > > > Hi All, > > I'm trying to create a .gpx route along a straight line, but with a > node ~100m. i.e. I have a transect and wish to survey every 100m. How > can I split straight polylines with a node every 100m, but keep the > same line? > > Obviously I can create points every 100m using the GRASS toolbox, but > these are then converted to a waypoint when saved as gpx. If I save > the two node lines then the GPS wont indicate when I've reached the > next survey point... > > Any help gladly appreciated! > Michael > > > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-user _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
