Hi,
About canvec/geobase. It's just as good in canvec as it is in geobase (actually, depending on the process that creates it, the data is moved from one product to the other) But there are slight differences between them and it makes me wondering if it makes sense to copy everything from geobase. My question is the following - How are we going to work/update/render duplicate feature? Why duplicate features? NHN/geobase product has for (4) packages and geometries may be duplicated between packages For example, a lake is described in Hydrographic and Hydro Network packages by at least two overlapped features . Bank (Hydro Network) - A feature delimiting all or part of a Waterbody feature (ie at least one line, usually many line segments delimiting a Waterbody) Waterbody (Hydrographic) - A polygon feature describing a body of water delimited by one or more Bank or Delimiter features (ie one closed line describing the Waterbody) It's the same with a small river/stream. It's described by at least two overlapped lines . Network Linear Flow (Hydro Network) - A feature that traces the movement of water in a one-dimension virtual water flow route (ie a line that traces the water flow) Single Line Watercourse (Hydrographic) - A linear feature describing the path of a narrow flow of water on the earth's surface (ie a line describing the path of a narrow flow of water) Should we really copy everything (packages) from geobase and put those duplicates ways in osm? For waterbody we might use a relation that point to bank segments but it won't work for Network linear flow/single line watercourse. Anyway it's the same for many hydrographic features. What have been decided? The subject may have been asked/answered before but I'm a kind of newbie in Talk-CA so let me know !-) Regards, Daniel _____ From: [email protected] [mailto:[email protected]] On Behalf Of Sam Vekemans Sent: March 13, 2009 19:59 To: [email protected]; Talk-CA OpenStreetMap; Kevin Farrugia; Simon Wood; Michel Gilbert; Steve Singer Subject: canvec or NHN Hi thanks for the Summery details, much appreciated :) As im going through the data, and have now matched up all the features, i just have a few left in which I put a "*" and a note beside indicating that it's a feature that needs to be proposed to the OSM community, so it can be rendered differently. (i think there are 20 or so left) Anyway, what i want to know if the Geobase NHN data which is shown in the CanVec set is just as good... or would it be better if i use the SHP files direct from GeoBase NHN? http://www.geobase.ca/doc/catalogue/GeoBase_NHN_Catalogue_1.0.1_EN.html#Cont ent As im going through the list, they are described as 'names' rather than canvec #'s making it slightly harder to spot if features are missing in the canvec set. Thanks, Sam Vekemans Across Canada Trails
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