Unrelated, but I noticed that talk-ca is not archived on Nabble yet - this makes it hard to share and follow a conversation as a non-subscriber. I don’t know what’s involved in adding this list or if anyone would object?
Martijn > On Jun 17, 2015, at 4:47 PM, Martijn van Exel <m...@rtijn.org> wrote: > > Hi Andrew, > > Thanks for elaborating on the CanVec / Geobase imports! This also raises new > questions.. See below. > >> On Jun 17, 2015, at 3:00 PM, Andrew MacKinnon <andrew...@gmail.com> wrote: >> >> 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. > > Is this described in more detail anywhere? Are the data / scripts / process > still available? Which dat was poor quality, CanVec or Statistics Canada? > >> - Road data in some areas is missing entirely. > > This is probably easy to visualize, but do you happen to know where / why? > >> - 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. > > Was some sort of progress page kept so we could see where certain features > were imported or not (yet)? Has a followup ever been considered to augment / > fix these botched / low quality imports? > >> - 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. > > Ah, interesting. Is there already a list of these candidates or would it make > sense to start one and look into proper licensing? > >> >> 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. > > Obviously I am partial to MapRoulette, but sure, let me check it out, I am > sure we can come up with something similar for Canada. What would the > reference data be instead of TIGER? > > Again, thanks for your insights, Andrew. > > Martijn _______________________________________________ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
