Re: [talk-au] GPS accuracy
On 22/09/12 10:20, Ben Johnson wrote: That is absolutely fantastic - cant wait to see it. BJ It should be available now if you tell JOSM to download a new plugin list. It's called GPSBlam. http://wiki.openstreetmap.org/wiki/JOSM/Plugins/GPSBlam Please tell me it works as it was a bit of a black art getting it up into the repository! Cheers Russell ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] GPS accuracy
Hi Russell, I've installed and run it in JOSM OK. But I see it operates only for straight lines. I was hoping it'd average GPS traces downloaded from OSM in JOSM around corners and curves. That would be a big ask, I know. John On 24/09/12 01:16, Russell Edwards wrote: On 22/09/12 10:20, Ben Johnson wrote: That is absolutely fantastic - cant wait to see it. BJ It should be available now if you tell JOSM to download a new plugin list. It's called GPSBlam. http://wiki.openstreetmap.org/wiki/JOSM/Plugins/GPSBlam Please tell me it works as it was a bit of a black art getting it up into the repository! Cheers Russell ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] GPS accuracy
On the topic of accuracy, some GPS's also have gyroscopes and accelerometers and compasses to error correct the GPS data. They're getting complicated enough now I don't like to comment on when/where they work well. There's just too many variables the algorithms are tweaked constantly by software updates. On 21/09/2012, at 9:38, Brett Russell brussell...@live.com.au wrote: My goal is pratical accuracy. By that, avoiding my GPS complaining with OSM that I am heading into oncomming traffic. The issue with that was the particular road was aligned to native Bing so was say five to ten metres out. If I can establish the correct alignment of Bing for the area then I can have the road in the correct place. Now of course if my GPS can not resolve to the necessary accuracy then I still will have the issue but that is between my GPS and OSM rather than OSM and the real position. I find the only way to get an accurate road position, especially corners/intersections or in poor signal areas, is to make several traces. But honestly I don't worry about it too much. A road that is 10 or even 50 meters off is better than no road at all on the map (especially in remote areas where most of the missing roads are). If I've only got a single poor quality trace I'll still put it in. Somebody else (or maybe me) will notice eventually and take the time to replace it with more accurate data. When reading the map, a GPS needs to allow for inaccuracies in it's own signal anyway, so in practice they handle it well. Of course, make it as good as you can, and fix other people's inaccurate data when you notice it, but I'm just saying if you have a bad trace and don't plan to drive down the road again 5 more times, by all means put what you've got on the map. When I know my trace is bad, I like to enter it with big gaps between each point, so you see straight lines and hard corners instead of a nicely flowing road on the map. Gradually working my way around Tassie by lake tracing and that is where I am understanding the challenges Bing gives you. Its image quality ranges from top class to murky but still great to have it as the alternative would be walking around every lake, tarn and pool. Sometimes I load my traces into google earth, since that has much higher quality satellite photos, to get an idea how far off my trace is. - Abhi ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] GPS accuracy
On 24/09/12 06:21, Abhi Beckert wrote: Somebody else (or maybe me) will notice eventually and take the time to replace it with more accurate data. Or, having taken great pains to get it very accurate, somebody will correct it with wildly inaccurate data. Sometimes from imagery with a big offset (incorrect datum). But that's life. John ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
[talk-au] OSM Australia Garmin download update timing and method
I have been updating OSM in my suburb, and am getting the feeling that while the Garmin maps on OSM Australia update every night, the changes I make don't seem to come through for many days. Can someone please explain the process so I know when to start looking for my updates ? thanks very much Ian ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] OSM Australia Garmin download update timing and method
Hi Ian, On 23/09/12 22:27, Steer wrote: I have been updating OSM in my suburb, and am getting the feeling that while the Garmin maps on OSM Australia update every night, the changes I make don’t seem to come through for many days. Can someone please explain the process so I know when to start looking for my updates ? I see changes come through within hours at higher resolutions (I hope I've got the right term there). But I've often got to click on reload current page in my browser to fetch the latest version instead of seeing the old cached version. At lower resolutions, changes can take a week to come through. That being said, you can force an update on any individual tile at any time. Right-click on the map to get the URL of the individual tile that interests you. Paste that into your browser's address bar and add /dirty to the end. Then press Enter to activate that URL. Eg, http://a.tile.openstreetmap.org/16/60531/38961.png becomes http://a.tile.openstreetmap.org/16/60531/38961.png/dirty and you'll get a result of Tile submitted for rendering. John ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] OSM Australia Garmin download update timing and method
Hi I assume that you are using OSM Australia website. Normally i have found it to bet updated every night but once it appeared to miss a night. I thought on the weekend it was a bit late but then released the lake I had traced in was not tagged as a lake. O'well easily fixed when back home. OSM Australia is a brilliant resource and I regularly use it as I only need to download Tassie maps. Sent an email to site owner but no reply so think it is a set and forget process. Anyway my thanks to the site creator. Cheers Brett On 24/09/2012, at 9:17 AM, Steer ist...@iinet.net.au wrote: I have been updating OSM in my suburb, and am getting the feeling that while the Garmin maps on OSM Australia update every night, the changes I make don’t seem to come through for many days. Can someone please explain the process so I know when to start looking for my updates ? thanks very much Ian ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] GPS accuracy
Hi Russell, Congratulations mate. It works - I tested it under both Mac OS/X (Leopard 10.5.8), and Linux (Ubuntu 12.04.1). I reckon this will now be my favorite method to line-up background images! Only a minor thing - (on the Mac at least) your scroll wheel method didn't work for me, but I prefer to use the arrows anyway because (for me) it's a bit tricky to click/drag then use scroll wheel while still holding onto the mouse button - that's a minor thing and it might just be me. I can try the wheel again if it's important for you to know for sure... Didn't try the scroll wheel method under Ubuntu as I use the trackpad on that machine but I can connect a mouse if you want it tested. Cheers, BJ On 24/09/2012, at 1:16 AM, Russell Edwards wrote: On 22/09/12 10:20, Ben Johnson wrote: That is absolutely fantastic - cant wait to see it. BJ It should be available now if you tell JOSM to download a new plugin list. It's called GPSBlam. http://wiki.openstreetmap.org/wiki/JOSM/Plugins/GPSBlam Please tell me it works as it was a bit of a black art getting it up into the repository! Cheers Russell ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
