If you are planning to load the National Hydrographic Network (NHN) data from GeoBase into OSM please be aware that the data is NOT distributed on a map sheet basis, like the road network. The NHN data is distributed on a watershed basis and I recommend that, if possible, you keep the watersheds intact during a load. This will greatly minimise the number of junctions you will need to manage given that, by definition, hydrographic features do not cross watershed boundaries, except at the entrance and exist for the watershed. An index map of the watersheds is available at http://www.geobase.ca/geobase/en/data/nhn/national-index.html
Mike Mepham Federal/Provincial/Territorial Liaison GeoConnections Program Natural Resources Canada E-Mail: [email protected] Ottawa Regina Phone: (613) 992-8549 (306) 780-3634 Fax: (613) 947-2410 (306) 780-5191 Address: 06Ath Floor, Room. 646R 615 Booth Street Ottawa, ON Canada K1A 0E9 100 Central Park Place 2208 Scarth Street Regina, SK Canada S4P 2J6 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Sam Vekemans Sent: January 11, 2009 19:05 To: [email protected]; [email protected]; [email protected] Subject: [Talk-ca] NHD (usa) NHN canada Hi, I might be able to help (or confuse) :) By taking the converted gov'nt data shape files (as a ready OSM file) and slice it into 16 squares, then compare each square to the existing OSM data square, and only those squares that have no 'natural=water & similar tags' you would import the data. Then square it off again and import the 'no OSM Data areas'. So then your left with only a few small squares that need to be traced. Does this make sence? Cheers, Sam Vekemans Across Canada Trails _______________________________________________ Talk-ca mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-ca
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