Re: [OSM-talk] A GPS Trace Visualizer
Hi All, Lukas Kabrt has been looking at something like this for his Google Summer of Code Project - might be worth looking at what he has done at http://wiki.openstreetmap.org/wiki/Routing/Travel_Time_Analysis. Graham. On 18 August 2010 23:02, John Smith wrote: > On 19 August 2010 07:26, Toby Murray wrote: > > I had not really considered mixed traces. My workflow typically > > results in pretty atomic traces especially when it comes to transport > > mode but yeah I can see your case being another complication in trying > > to use traces to derive avg speeds. > > walking ~= 5km/hr > cycling ~=20-40km/hr > cars ~= > 100km/hr > > It might be an issue for areas with reduced speed limits, but > realistically I don't see this as such an issue as everyone is making > it out to be, as long as you have suitable GPS information like > timestamps to calculate speed. > > ___ > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk > -- Dr. Graham Jones Hartlepool, UK email: grahamjones...@gmail.com ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] A GPS Trace Visualizer
On 19 August 2010 07:26, Toby Murray wrote: > I had not really considered mixed traces. My workflow typically > results in pretty atomic traces especially when it comes to transport > mode but yeah I can see your case being another complication in trying > to use traces to derive avg speeds. walking ~= 5km/hr cycling ~=20-40km/hr cars ~= > 100km/hr It might be an issue for areas with reduced speed limits, but realistically I don't see this as such an issue as everyone is making it out to be, as long as you have suitable GPS information like timestamps to calculate speed. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] A GPS Trace Visualizer
On Wed, Aug 18, 2010 at 3:54 PM, Liz wrote: > On Thu, 19 Aug 2010, Toby Murray wrote: >> I personally tag all my trace uploads with mode of transportation >> (bicycle, car, walking) as well as the make and model of the GPS unit >> (garmin, edge 305) but yeah that probably can't be relied upon too >> much. > I don't break the trace at the point at which I get out of the car or off the > bike and walk, so I have mixed tracks almost always. I had not really considered mixed traces. My workflow typically results in pretty atomic traces especially when it comes to transport mode but yeah I can see your case being another complication in trying to use traces to derive avg speeds. Toby ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] A GPS Trace Visualizer
On Thu, 19 Aug 2010, Toby Murray wrote: > I personally tag all my trace uploads with mode of transportation > (bicycle, car, walking) as well as the make and model of the GPS unit > (garmin, edge 305) but yeah that probably can't be relied upon too > much. I don't break the trace at the point at which I get out of the car or off the bike and walk, so I have mixed tracks almost always. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] A GPS Trace Visualizer
On Wed, Aug 18, 2010 at 10:25 AM, davespod wrote: > Even average speed for routing purposes would be difficult to determine. How > would you differentiate between car, motorcycle, bicycle, unicycle, horse or > shank's pony*? I personally tag all my trace uploads with mode of transportation (bicycle, car, walking) as well as the make and model of the GPS unit (garmin, edge 305) but yeah that probably can't be relied upon too much. Toby ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] A GPS Trace Visualizer
> There is likely to be a considerable difference between the average speed > and the maximum speed, particularly along streets that are badly congested > at different times of day. The average speed is useful for routing > decisions, > but should be tagged separately from the maximum speed. Even average speed for routing purposes would be difficult to determine. How would you differentiate between car, motorcycle, bicycle, unicycle, horse or shank's pony*? David * Apologies: just remembered the international audience: this is an idiom meaning walking. ---Original Email------- Subject :Re: [OSM-talk] A GPS Trace Visualizer >From :mailto:deltafoxtrot...@gmail.com Date :Wed Aug 18 07:57:17 America/Chicago 2010 On 18 August 2010 22:51, andrzej zaborowski wrote: > For some time I have been thinking about making a tileserver / WMS > with a visualisation of OSM GPS traces, but one where you can see how > many traces overlap at a given point (so some kind of heat map thing). > This would be used for tracing in JOSM instead of displaying all the > traces in the same colour. This would really let you estimate where > the centreline of a road / lane is and would let you really take > advantage of having 1000s of traces for the same street (like in big > cities with many mappers). The centre line is obvious, but there is a number of other things you could do as well, like indicating average/mean speed to help with maxspeed=* tagging and also where traffic lights exist. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk -- John F. Eldredge -- j...@jfeldredge.com "Reserve your right to think, for even to think wrongly is better than not to think at all." -- Hypatia of Alexandria ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk -- View this message in context: http://gis.638310.n2.nabble.com/A-GPS-Trace-Visualizer-tp5435033p5436728.html Sent from the General Discussion mailing list archive at Nabble.com. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] A GPS Trace Visualizer
Ha, projections! I have been too lazy to think about that so far, so right now this guy just has a cartesian grid going from -180 to 180 and -90 to 90. Maybe sometime I'll add different flattened projections, as well as sticking everything on a sphere. Sometime. On Wed, Aug 18, 2010 at 3:32 AM, M∡rtin Koppenhoefer wrote: > 2010/8/18 Toby Murray : >> Interesting. In the past I've just used JOSM to download all the GPS >> traces in my area and then taken a screen shot. > > I did some visualisations in the past using gnuplot, but not caring > about projections and the like (just used a cartesian grid). > > cheers, > Martin > > ___ > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk > -- Cory Lueninghoener Hacker, Photographer, Tinkerer http://www.wirelesscouch.net/ ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] A GPS Trace Visualizer
On 18 August 2010 23:08, John F. Eldredge wrote: > There is likely to be a considerable difference between the average speed and > the maximum speed, particularly along streets that are badly congested at > different times of day. The average speed is useful for routing decisions, > but should be tagged separately from the maximum speed. there is a reason I wrote it as 'average/mean'... I'm sure with enough GPS data, not just the location of points, and using some statistical methods to properly analysis it you could get some meaningful additional information out of the data. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] A GPS Trace Visualizer
On 18 August 2010 14:57, John Smith wrote: > The centre line is obvious The problem is when you really have "a lot" of traces in an area. Considering that people also upload non-car driving traces, and traces from broken GPSes or simply with really big horizontal error, at some point when you look at your city, every pixel on your screen is covered with a GPS point. You can only rely on the density of those points then. This is already the case around the biggest streets in big metropoleis. Cheers ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] A GPS Trace Visualizer
There is likely to be a considerable difference between the average speed and the maximum speed, particularly along streets that are badly congested at different times of day. The average speed is useful for routing decisions, but should be tagged separately from the maximum speed. ---Original Email--- Subject :Re: [OSM-talk] A GPS Trace Visualizer >From :mailto:deltafoxtrot...@gmail.com Date :Wed Aug 18 07:57:17 America/Chicago 2010 On 18 August 2010 22:51, andrzej zaborowski wrote: > For some time I have been thinking about making a tileserver / WMS > with a visualisation of OSM GPS traces, but one where you can see how > many traces overlap at a given point (so some kind of heat map thing). > This would be used for tracing in JOSM instead of displaying all the > traces in the same colour. This would really let you estimate where > the centreline of a road / lane is and would let you really take > advantage of having 1000s of traces for the same street (like in big > cities with many mappers). The centre line is obvious, but there is a number of other things you could do as well, like indicating average/mean speed to help with maxspeed=* tagging and also where traffic lights exist. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk -- John F. Eldredge -- j...@jfeldredge.com "Reserve your right to think, for even to think wrongly is better than not to think at all." -- Hypatia of Alexandria ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] A GPS Trace Visualizer
On 18 August 2010 22:51, andrzej zaborowski wrote: > For some time I have been thinking about making a tileserver / WMS > with a visualisation of OSM GPS traces, but one where you can see how > many traces overlap at a given point (so some kind of heat map thing). > This would be used for tracing in JOSM instead of displaying all the > traces in the same colour. This would really let you estimate where > the centreline of a road / lane is and would let you really take > advantage of having 1000s of traces for the same street (like in big > cities with many mappers). The centre line is obvious, but there is a number of other things you could do as well, like indicating average/mean speed to help with maxspeed=* tagging and also where traffic lights exist. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] A GPS Trace Visualizer
For some time I have been thinking about making a tileserver / WMS with a visualisation of OSM GPS traces, but one where you can see how many traces overlap at a given point (so some kind of heat map thing). This would be used for tracing in JOSM instead of displaying all the traces in the same colour. This would really let you estimate where the centreline of a road / lane is and would let you really take advantage of having 1000s of traces for the same street (like in big cities with many mappers). Cheers ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] A GPS Trace Visualizer
2010/8/18 Toby Murray : > Interesting. In the past I've just used JOSM to download all the GPS > traces in my area and then taken a screen shot. I did some visualisations in the past using gnuplot, but not caring about projections and the like (just used a cartesian grid). cheers, Martin ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] A GPS Trace Visualizer
Interesting. In the past I've just used JOSM to download all the GPS traces in my area and then taken a screen shot. Since I have been the only person in a 100 mile radius contributing to OSM, I could just use that to say "these are all my traces" but now there is finally another mapper in the area cluttering up "my" traces so I may have to take a look at this :) Toby On Tue, Aug 17, 2010 at 11:12 PM, Cory Lueninghoener wrote: > Hi all, > > I was inspired a few weeks ago to do something more with all of the > GPS traces I've collected over the last three and a half years. After > a bit of hacking with Processing, I found I had created a toy that > made (in my opinion) some fun "art" style plots of where I had been: > > http://www.wirelesscouch.net/gpsmaps/ > > I'm sure other people have written their own versions of this same > thing (I know they have, 'cuz I've seen similar images on the web), > but I figured I'd share my version here. I didn't bother researching > those other implementations, so I wouldn't be surprised of they're > better than mine. :) > > Anyway, if anybody is interested in playing with the (very beta) toy, > feel free to grab a copy: > > http://www.wirelesscouch.net/labs/gpxmap/ > > Point it at a directory full of .gpx files and it should do the rest. Enjoy! > > -- > Cory Lueninghoener > Hacker, Photographer, Tinkerer > http://www.wirelesscouch.net/ > > ___ > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk > ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
[OSM-talk] A GPS Trace Visualizer
Hi all, I was inspired a few weeks ago to do something more with all of the GPS traces I've collected over the last three and a half years. After a bit of hacking with Processing, I found I had created a toy that made (in my opinion) some fun "art" style plots of where I had been: http://www.wirelesscouch.net/gpsmaps/ I'm sure other people have written their own versions of this same thing (I know they have, 'cuz I've seen similar images on the web), but I figured I'd share my version here. I didn't bother researching those other implementations, so I wouldn't be surprised of they're better than mine. :) Anyway, if anybody is interested in playing with the (very beta) toy, feel free to grab a copy: http://www.wirelesscouch.net/labs/gpxmap/ Point it at a directory full of .gpx files and it should do the rest. Enjoy! -- Cory Lueninghoener Hacker, Photographer, Tinkerer http://www.wirelesscouch.net/ ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
