Hi all, I'm working on importing (most of) the 082E tile, and the part of the import process where you match roads in RoadMatcher is taking ages, even though there's very little data in OSM for the area (the reason I picked this tile, along with the fact that I used to live in the area). The reason it's taking so long is the fact that the OSM data for Highway 3 and the NRN data are very different in places.
It seems like a combinations of things might have affected the data that's present now: - valleys throwing the GPS accuracy way out (or killing it entirely, and enabling the "feature" of garmin (and other?) units where it just interpolates until it gets a lock back); - low sampling frequency in the saved GPX tracks, which then got imported directly, or was traced at low zoom levels (the satellite data for most of highway 3 is low-res); - there are certainly other scenarios, but it's getting late and my brain's a bit fuzzy from staring at RoadMatcher for hours. It looks like the data was generally collected in one drive through by a non-local. I'm not saying the data's crap, some of is really quite good. But there are parts of it where it looks like a helicopter was used :) And I'm not entirely sure how trustworthy the NRN data really is -- presumably it's good enough for the government to use, and most of it says the positional accuracy is 25m or less... So, what should I do for an upload? Just upload the standalone portions like the process says, or should I upload all of the data, and delete the current OSM data where it's strange? The files for this tile are at http://drop.io/bvhw44o#list/sort_by_name/order_by_asc/60 for those who might wish to look at it. I can find bounding boxes for some examples if folks wish them. peace, Austin. -- Build a man fire, he'll be warm for a day. Set a man on fire, he'll be warm for the rest of his life. _______________________________________________ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca