Re: GPS wrong longitude
Robin Paulson wrote: > 2009/1/9 Nicolas Laurance : >> screenshot2 >> > > you're not locked on to any satellites > > the numbers at the bottom-left of the screen, (12/0) say the gps can > see 12, and is locked on to 0 - it needs to lock on to 4 or 5 minimum > to get a fix > Actually, you get a fix even with 3 satellites - using the approximate assumption that your elevation is zero or "same as last time". Accuracy is not good, unless the assumption holds. Helge Hafting ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: GPS wrong longitude
> it looks like you've previously got a fix, then turned off the gps and > restarted it. gpsd will often report phantom locations (usually the > last place you were at before turning off) in this situation - even, > as in this case, a decent hdop value (2.6) > > you need to make sure gps is on and wait until it gets a fix This situation is permanent, I never get good data on this screen. Even after a hard reboot and waiting for 25 + minutes in open sky ( no building, no tree, no cloud) The position on the map is correct and stays ok even if I move. I guess, it looks like a bug in Tango ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: GPS wrong longitude
Yes I get the same problem from the trip menu on Tangogps only. I get the correct lat/long from my other GPS device and also from agpsui on the freerunner. Looks like it is a bug in TangoGPS. Nicolas Laurance wrote: > hi all, > > I've tried several distrib (FSO, SHR) and I have an issue with the GPS > > maybe more specifically TangoGPS, don't know > > the symptom is : > > After the fix, Tango shows me on the correct position on the map > but in the Trip tab the latitude data is completely wrong, more than 1 > degree west > > > Does anyone have the same issue ? > any idea on how to fix ? > -- Jim Morris, http://blog.wolfman.com ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: GPS wrong longitude
2009/1/9 Nicolas Laurance : > screenshot2 > you're not locked on to any satellites the numbers at the bottom-left of the screen, (12/0) say the gps can see 12, and is locked on to 0 - it needs to lock on to 4 or 5 minimum to get a fix it looks like you've previously got a fix, then turned off the gps and restarted it. gpsd will often report phantom locations (usually the last place you were at before turning off) in this situation - even, as in this case, a decent hdop value (2.6) you need to make sure gps is on and wait until it gets a fix ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: GPS wrong longitude
I can also, if it's useful, give a GPS track showing this issue; you can see it on an OpenStreetMap[1] map, here[2]. It has bee already loaded in OSM's database, so you only have to download the osm datas and the gpx datas for the area. LAT MIN: 41.06546877365579 LAT MAX: 41.07294855015945 LON MIN: 16.914316880834026X LON MAX: 16.928509008753377 [1] www.openstreetmap.org [2]http://www.openstreetmap.org/?lat=41.06992&lon=16.92266&zoom=17&layers=B000FTF Nicolas Laurance wrote: > hi all, > > I've tried several distrib (FSO, SHR) and I have an issue with the GPS > > maybe more specifically TangoGPS, don't know > > the symptom is : > > After the fix, Tango shows me on the correct position on the map > but in the Trip tab the latitude data is completely wrong, more than 1 > degree west > > > Does anyone have the same issue ? > any idea on how to fix ? > > many thanks, > > and, oh, happy new year > > Nicolas > > ___ > Openmoko community mailing list > community@lists.openmoko.org > http://lists.openmoko.org/mailman/listinfo/community -- Francesco de Virgilio *Ubuntu-it Member and Wiki Editor* mailto:frad...@ubuntu-it.org http://wiki.ubuntu-it.org/FrancescoDeVirgilio *Wikimedia Italia Member* http://en.wikipedia.org/wiki/User:Fradeve11 *OpenStreetMap Mapper* http://www.openstreetmap.org/user/Fradeve11 *Blog* http://fradeve.netsons.org "Love - Peace - Freedom - Free Software" ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: GPS wrong longitude
I can confirm this, but only until GPS fixes the 4th satellite. After that, in more or less 5 or 6 seconds, it gives the correct position. Nicolas Laurance wrote: > hi all, > > I've tried several distrib (FSO, SHR) and I have an issue with the GPS > > maybe more specifically TangoGPS, don't know > > the symptom is : > > After the fix, Tango shows me on the correct position on the map > but in the Trip tab the latitude data is completely wrong, more than 1 > degree west > > > Does anyone have the same issue ? > any idea on how to fix ? > > many thanks, > > and, oh, happy new year > > Nicolas > > ___ > Openmoko community mailing list > community@lists.openmoko.org > http://lists.openmoko.org/mailman/listinfo/community -- Francesco de Virgilio *Ubuntu-it Member and Wiki Editor* mailto:frad...@ubuntu-it.org http://wiki.ubuntu-it.org/FrancescoDeVirgilio *Wikimedia Italia Member* http://en.wikipedia.org/wiki/User:Fradeve11 *OpenStreetMap Mapper* http://www.openstreetmap.org/user/Fradeve11 *Blog* http://fradeve.netsons.org "Love - Peace - Freedom - Free Software" ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: GPS wrong longitude
So, correct position on the map, but wrong numbers. Maybe tangogps has an error converting its numerical variables to strings for the screen. Try notifying the developer(s). Also try reading the gps with some other software. Helge Hafting ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: GPS wrong longitude
screenshot1 sorry <>___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: GPS wrong longitude
screenshot2 <>___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: GPS wrong longitude
sorry if i'm being missing the point and being pedantic, but i'm sure latitude measures angle north/south of the equator. you're right, a typo from me, mea culpa the latitude N/S is correct the longitude is biased W by ± 1°, correct that's more than 100 km I confirm the position on the map (OSM or google) is OK only the display in the track tab is completely wrong screenshot1 shows the map, the position is ok screenshot2 shows the track tab, the longitude is bad it should be something close to W 002° 22.764 http://maps.google.fr/?ie=UTF8&ll=47.808673,-2.379398&spn=0.067214,0.147972&z=13 NL <>___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
RE: GPS wrong longitude
2009/1/8 Nicolas Laurance : > After the fix, Tango shows me on the correct position on the map > but in the Trip tab the latitude data is completely wrong, more than 1 > degree west sorry if i'm being missing the point and being pedantic, but i'm sure latitude measures angle north/south of the equator. longitude measures the angle east/west of the greenwich meridian are you at a point where the two have similar values, and getting them the wrong way round? alternatively, how precise is the lat/lon reading? tangogps provides an hdop value - realistically, this should be as low as possible. maybe you can't get a good fix, because of trees/buildings/old kernel with microsd interference? One degree in latitude means 111 kilometers. This thread is yearning for a screenshot! Lucas ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: GPS wrong longitude
2009/1/8 Nicolas Laurance : > After the fix, Tango shows me on the correct position on the map > but in the Trip tab the latitude data is completely wrong, more than 1 > degree west sorry if i'm being missing the point and being pedantic, but i'm sure latitude measures angle north/south of the equator. longitude measures the angle east/west of the greenwich meridian are you at a point where the two have similar values, and getting them the wrong way round? alternatively, how precise is the lat/lon reading? tangogps provides an hdop value - realistically, this should be as low as possible. maybe you can't get a good fix, because of trees/buildings/old kernel with microsd interference? ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
