Hi Peter, I am also a sailor and therefore interested in your project. I hope you will share your progress on this list.
> * replay race showing instantaneous statistics Some month ago I played around with gpsd and it's clients and it's possible to record NMEA data with gpsd, or you can use gpsbabel to convert any gps tracks to NMEA data, and later use vikings "real time gps tracking" to replay them. > * add marks to a sailing course Sounds like it could be resolved with waypoints. > * determine VMG towards a mark I guess you want to display marks with VMG along a track, i guess you probably you could also process your gpx files first and generate Waypoints with VMG marks. I would do this with some perl code. > The first question is do people have advice on what I need to read to > try and understand how to add a new layer? I guess trying to understand the code is the best way e.g. viklayer.c cheers lixus ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com _______________________________________________ Viking-devel mailing list Viking-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/viking-devel Viking home page: http://viking.sf.net/
