Hi, For the cleaning part, I use GPSBabel to: 1. remove low hdop/vdop (and low satellites) points 2. remove close points (<1m) due to traffic-lights, parking-pauses to reduce overall file-size. 3. remove areas I often go or park to avoid clouds. (this first needs transformation to wpt, then back to trk after filtering) 4. convert raw nmea to gpx
This is the script I use ($1 is input file, $2 is output file): gpsbabel -i nmea -f $1 -x discard,hdop=2,vdop=3,sat=4 -x position,distance=1m -x transform,wpt=trk,del -x polygon,exclude,file=area.loc -x transform,trk=wpt,del -o gpx -F $2 where area.loc is an exclusion polygon file containing for instance: #mepz 10.327382 123.97915 10.328248 123.97975 10.329328 123.98076 10.330446 123.98000 10.327611 123.97688 10.327382 123.97915 Regards, Totor --- On Tue, 4/13/10, maning sambale wrote: > From: maning sambale > Subject: [talk-ph] sanity check for maintaining GPS tracks > To: "osm-ph" , "osm-talk" > Date: Tuesday, April 13, 2010, 9:50 AM > I have hundreds of GPS tracks. Some > are uploaded in OSM, some I forgot > to upload. Some are clean, some are dirty, some are > squiggly and some > are a big cloud of points pointing to my house. > > Any advice on how to maintain/clean the tracks before > uploading? > > -- > cheers, > maning _______________________________________________ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph