Re: [Talk-ca] Confusing CanVec import: Elliot Lake
On 14-08-28 01:44 AM, James Ewen wrote: OSM is a living entity that changes. I know this, James. But an edit should change the map for the better. There were trails along Horne Lake, trails with boardwalks and bridges that I walked and mapped by hand. But that work's gone — foom! — replaced with an imported Horne Lake, v1 with land use polygons that aren't even clipped to the lakeshore. So have a bit of a look into what CanVec is … You'll find these artifacts all over. I'd like to suggest that, if an import breaks a country into Minecraft-like square blocks, you're doing it wrong. Many of the import guidelines were broken here, too. Is the CanVec import process described in the wiki moribund? If there had been some discussion here about imports in the 041J locale, I'd have relished the opportunity to help fuse imported and source=survey data. Large complicated polygons abound in the OSM database. They just need to be dealt with appropriately. Import/Guidelines recommends simplifying shapes http://wiki.openstreetmap.org/wiki/Import/Guidelines#Consider_simplifying, and MapShaper — the suggested tool — uses a couple of appropriate algorithms. Everyone's contributions are appreciated, but occasionally we bump into each other. Yeah, but as a pedestrian, I stood no chance against CanvecImports' steamroller. cheers, Stewart ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Confusing CanVec import: Elliot Lake
I give a big +1 to James' comments -Original Message- From: James Ewen [mailto:ve6...@gmail.com] ... existing data usually stays. Obviously a mistake was made. We're all human. ... whichever source has the best resolution should be the one that stays, or perhaps a merge of the best data from both... ... OSM is a living entity that changes. ... you've found an area of concern, and Andrew is responding. You can't get much better than this. ... should we take your Horne Lake closed polygon and simplify it down to 20 points? [...] who defines sensible? ... And of course, thank you to both of you for all the work you guys ave done in adding to the OSM database. Everyone's contributions are appreciated, but occasionally we bump into each other. This forum gives us the perfect place to say Oops, excuse me... sorry! ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Confusing CanVec import: Elliot Lake
Hello: For what it's worth I've downloaded the changeset (# 20327545 ) around Horner lake and there wasn't any trails there prior to my upload. I'll continue to investigate. Andrew aka CanvecImports ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Confusing CanVec import: Elliot Lake
I would ask http://www.openstreetmap.org/user/CanvecImports CanvecImports to clean his mess… Daniel From: Stewart C. Russell [mailto:scr...@gmail.com] Sent: August-27-14 11:44 To: Talk-CA OpenStreetMap Subject: [Talk-ca] Confusing CanVec import: Elliot Lake Hi - back in Elliot Lake after a couple of years away, and my, has the map grown here. It looks like there has been multiple overlapping imports in some places, though. F'rinstance, this relation: http://www.openstreetmap.org/relation/1176648 has multiple coastlines, an import square bisecting a lake, and forestry land-use sitting in the water. There are also some hand-surveyed details removed by an import. I know they weren't perfect, but neither's the import. And I didn't even bring a GPS with me to start to fix the damage … cheers, Stewart ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Confusing CanVec import: Elliot Lake
Hello: Thanks, for the feedback. I must have missed the duplicate relation for Elliot lake. As a rule I don't remove any existing data, unless the data is duplicated and then I try to pick the best one. From the bing imagery I can see a couple of islands that are offset south of Sylvah island.The bisecting lake is a result of the 2,000 node limit for a way. Having a quick look from the gps tracks, it appears the Sheriff Creek Nature trails, fire towers, Hampton Inn and other POI's, where untouched. Part of the access road for Spruce Avenue Beach appears to have be been altered back in 2009. I've downloaded the gps data and I can see where there should be some thing, I just can't find in the history where or when it was deleted. Just a thought could the missing data be a result of some user who did not accept the new terms of service and the data got purged as a result of the license change over removal? Andrew aka CanvecImports On Wed, 2014-08-27 at 15:23 -0400, Daniel Begin wrote: I would ask CanvecImports to clean his mess… Daniel From: Stewart C. Russell [mailto:scr...@gmail.com] Sent: August-27-14 11:44 To: Talk-CA OpenStreetMap Subject: [Talk-ca] Confusing CanVec import: Elliot Lake Hi - back in Elliot Lake after a couple of years away, and my, has the map grown here. It looks like there has been multiple overlapping imports in some places, though. F'rinstance, this relation: http://www.openstreetmap.org/relation/1176648 has multiple coastlines, an import square bisecting a lake, and forestry land-use sitting in the water. There are also some hand-surveyed details removed by an import. I know they weren't perfect, but neither's the import. And I didn't even bring a GPS with me to start to fix the damage … cheers, Stewart ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Confusing CanVec import: Elliot Lake
On 14-08-27 06:23 PM, Andrew wrote: As a rule I don't remove any existing data, unless the data is duplicated and then I try to pick the best one. But deleting my tracing of Horne Lake was okay, though? http://www.openstreetmap.org/way/77445326/history You should have bumped the way version, given that there was a lake already there with the same name. From the bing imagery I can see a couple of islands that are offset south of Sylvah island.The bisecting lake is a result of the 2,000 node limit for a way. But it exactly corresponds to these weird square boundaries that are all over the area, like this way: http://www.openstreetmap.org/way/259481614 - so you broke a lake that was already there. Can't you run a simplification algorithm for closed polygons to get the count down to something sensible? I've downloaded the gps data and I can see where there should be some thing, I just can't find in the history where or when it was deleted. I don't usually upload GPS data. I was doing a lot of editing in QGIS at the time. Just a thought could the missing data be a result of some user who did not accept the new terms of service No, the edits were me, or an earlier import from geobase_stevens from 2009. Please, as Daniel suggested, clean up your mess. Stewart ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
