Re: [Talk-ca] Hiking trails - Is bad data better than no data?
You have my vote. Just having the inaccurate data will draw more people to the trail. Higher percent chance of getting more gps data for the area. Sent from my iPhone On 2010-07-25, at 10:57 PM, Darryl Shpak dar...@shpak.ca wrote: Hey all, A quick question here, since I'm somewhat out-of-touch with OSM best practices right now. Last week I hiked a couple of trails in a local provincial park, and collected traces with intent to map them. However, I know the data is of questionable quality...on the first trail, I walked one segment twice and there's a significant disparity between the two gps tracks, and on the second trail, my GPS was reporting 20-30m position error at times. Neither of these trails existed in OSM at all (no GPS tracks, no ways). I've uploaded my GPS traces and I'm mapping my trails on the assumption that an inaccurate trace is better than no data at all, but wanted to check with the wider community to see what the general consensus was on this. Is there anything special I should tag the trace or way with to indicate that I know the tracks are a little flaky? Sample trail: http://www.openstreetmap.org/?lat=49.69252lon=-95.33649zoom=16layers=M - Darryl ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Hiking trails - Is bad data better than no data?
I vehemently oppose including bad data in the OSM database. I only insert the best possible data available into database. If your GPS tracks are the best data available, then insert that into the database. Should better data become available, then that should be used to increase the accuracy of the trail data. It's all in the way you look at it! James VE6SRV On 7/26/10, G. Michael Carter mikeycarter1...@gmail.com wrote: You have my vote. Just having the inaccurate data will draw more people to the trail. Higher percent chance of getting more gps data for the area. Sent from my iPhone On 2010-07-25, at 10:57 PM, Darryl Shpak dar...@shpak.ca wrote: Hey all, A quick question here, since I'm somewhat out-of-touch with OSM best practices right now. Last week I hiked a couple of trails in a local provincial park, and collected traces with intent to map them. However, I know the data is of questionable quality...on the first trail, I walked one segment twice and there's a significant disparity between the two gps tracks, and on the second trail, my GPS was reporting 20-30m position error at times. Neither of these trails existed in OSM at all (no GPS tracks, no ways). I've uploaded my GPS traces and I'm mapping my trails on the assumption that an inaccurate trace is better than no data at all, but wanted to check with the wider community to see what the general consensus was on this. Is there anything special I should tag the trace or way with to indicate that I know the tracks are a little flaky? Sample trail: http://www.openstreetmap.org/?lat=49.69252lon=-95.33649zoom=16layers=M - Darryl ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
[Talk-ca] Canvec alignment - careful when merging tiles!
I know it has been suggested to use the JOSM validator to find duplicate nodes and fix them to join adjacent canvec tiles. I wanted to add that we should be manually inspecting the tile boundaries because I've run into situations where: - Roads are just ever so slightly off, meaning they never did merge with the fix duplicates. - Areas that you can't join using the SHIFT-J Join overlapping areas because the nodes don't line up. For example: http://www.egunn.com/gallery2/d/29208-1/canvec_alignment.jpg This is pretty easy; just select the offending node at the bottom, manually Merge them, and then Shift-J to join the two areas. For roads, you can just merge the nodes and you're good. A quick litmus test to see if two roads were merged properly is to select both ways and try to combine them. If it says you can't combine them, then the nodes didn't merge. Have fun! Tyler -- Tyler Gunn ty...@egunn.com http://www.egunn.com/ ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
[Talk-ca] OpenStreetMap Canada Facebook Page
Hi All, Like other mediums we have, and not everyone will be connected to it. http://www.facebook.com/?sk=messages#!/pages/OpenStreetMap-Canada/129173017125834 I created a facebook page, and set all of the people who 'like' it, to become and admin to the page, so then it's works the same way that the Wiki is set to. So if you dont like something on the page, you can edit it. Just like how some people dont like Facebook (8:46:02 PM) Acrosscanadatrails: cool ... thats was fast .. unfortunatly ... everyone is on facebook ... be it peer pressure or accidental (8:49:12 PM) JohnSmith: - isn't (8:49:48 PM) Acrosscanadatrails: lol (8:49:53 PM) Acrosscanadatrails: yet (8:50:09 PM) JohnSmith: I get an allergic reaction to facebook urls (8:50:31 PM) Acrosscanadatrails: Now THAT should be on a t-shirt :) (8:51:06 PM) JohnSmith: heh There are lots of users who dont like IRC chat, nor like this talk-ca@ mailing list nor the OSM forum. I guess this is yet another simple form of 'outreach' to the community. So then its a way to cross-share ideas that are generated from the other mediums. Announcements and stuff. .. or rather, as a way to try to connect with all of the existing mappers, so more people are on the same page. Especially now with the map currently changing with 'hyper-growth', i think it's important to start getting more mappers (who already work on OSM) to be able to start working on their own area. Now that we have an 'semi-established' method for working with the canvec data, it's a probably a good idea to start a little more crowd-sourcing. Canada is notoriously known on facebook, so most of you have an account. (be it peer pressure or accidental) :-) What was interesting was that as soon as i set it up and invited all my osm contacts, 2 instantly 'liked' it. Cheers, Sam Twitter: @Acrosscanada Blogs: http://acrosscanadatrails.posterous.com/ http://Acrosscanadatrails.blogspot.com Facebook: http://www.facebook.com/sam.vekemans Skype: samvekemans IRC: irc://irc.oftc.net #osm-ca Canadian OSM channel (an open chat room) @Acrosscanadatrails ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
