A lot of the data in Canada was imported from CanVec and Geobase, some of it by me several years ago. The imported data is pretty poor quality in many places. I haven't done much work on this recently, as imports have a bad reputation in OSM and I am mostly concerned with surveying. For example:
- Some older road data comes from an import which combined CanVec and Statistics Canada road names, attempting to match the road names in Statistics Canada with roads without names from CanVec, and this data is poor quality. - Road data in some areas is missing entirely. - The CanVec address data is low quality, and is often broken - e.g. on a tile boundary address ranges will be split in half, and comes from several different versions of CanVec. - Other CanVec layers such as woods, lakes and so on were imported in some areas but not others. Much of this data is low quality. - Some road names have too many spaces e.g. "John Street" is "John Street". Some address ranges are like that as well. - lanes=-1 and surface=unpaved for roads that are really paved in Quebec. - Better quality municipal GIS datasets are now available in some cities like Toronto, Peel Region and York Region and if they are properly licensed, these should be used whenever possible. There generally are some minor errors in these datasets, but they are far better quality than CanVec/Geobase. I really like the TO-FIX Tiger Delta layer at <http://osmlab.github.io/to-fix/#/task/tigerdelta> which matches TIGER data with OSM data and tries to find errors. It would helpful if a similar tool were created for Canada. On Wed, Jun 17, 2015 at 4:27 PM, Harald Kliems <kli...@gmail.com> wrote: > A few things I can think of: > > On Wed, Jun 17, 2015 at 3:13 PM Martijn van Exel <m...@rtijn.org> wrote: >> >> * Are there any Canada-specific mapping and tagging conventions? > > - There seems to be a strong consensus that what elsewhere would be > highway=unclassified is highway=residential, no matter if the road is in a > populated area or not. > >> * Are there any known big (national) issues in the Canadian OSM data? >> (misguided imports / bots, major tagging disputes, that kind of thing) > > I believe these mostly affect Quebec, but there are two import problems that > never got systematically fixed, as far as I know: > - CanVec import of highways where lanes=-1 and surface=unpaved. > - CanVec or Geobase import where there is an extra blank between the street > type designation and the name. E.g. Rue__Sherbrooke instead of > Rue_Sherbrooke. > > Harald (now in the US) > > _______________________________________________ > 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
