hi all, i'm new to qlandkartegt and just started using gps for navigation (bicycle). until now, i was around with my holux m241 logging and contributing to OSM. Having now a Garmin GPSMAP 60CSx (i had birthday in april *smile*), i want to make routes and work with them. As you may know, garmin handheld devices have a limitation of 250 points per route for navigation "off road" and a total of 500 points for all routes on the device.
if i use yournavigation.org to make a route (create a gpx file) and then open it in qlandkarte, what is the workflow to make a route out of it in qlandkarteqt for upload to garmin 60csx? i tried making an overlay of the track, then make a route which gives me all trackpoints->routepoints. i have seen you can reduce the points by distance or truncate by timestamp. 1) what is the workflow to make out of a complex track a route? 2) is there a possibility to reduce the number of points based on complexity or information a point gives to the route? my suggestion to 2: if you have points p1,p2,p3 and the angle formed by these 3 points is between intervall [175°;185°] (or customisable +/- 5°, 10°, 20°, 60°, ...°), then p2 can be removed from the route point array. in a way this is a smoothing of the route without losing short lines. the rationale for doing such a filtering and not a distance-based filtering is: if you have (bike or footway routes!) short distances you have to navigate through woods or residential area, then if you filter by 50 m distance between route points, if crossings are <50 m apart, the route will loose shape and at the same time long track parts will still have every 50 m a route point. if you filter by angle information contributed to the route, long straight or almost straight distances will have a minimum of route points spent and routing through complex parts will still keep detail. btw: i'm using qlandkarteqt 1.1.2 on archlinux greetings and thank you for all the input! Damir ------------------------------------------------------------------------------ EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev _______________________________________________ Qlandkartegt-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/qlandkartegt-users
