> On Dec 27, 2007 4:35 PM, John Fereira <jaf30_at_cornell.edu> wrote: > > > > > I have also been building my own maps using available GIS data and > > have created some pretty good base maps with street/park/hydrology > > and a few other features. It's a pretty tedious process though. > > > Navigational charts produced by the U.S. Government are not copyrighted and > are available free of charge on the Internet and also from companies which > have made DVDs from this data and sell those relatively cheaply. Charts from > Canada are under a copyright owned by the government of Canada and are not > freely available. > One can only hope that the Canadian Hydrographic Service will eventually follow the lead of Natural Resources Canada and make their digital data available for free. I can understand there being a cost involved in updating the "notices to mariners" (or whatever it is called), but the basic islands and water depths do not change -- any more than the data on topo maps change -- and that stuff should be available freely. If you could get vector data, there are programs that will let you convert it into the formats used by Garmin, Magellan and Lowrance GPS units. (Not sure about the units used for in-car navigation, and not sure about other brands either. But there's lots of support of the Garmin GPS handheld units.) -- Darryl *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Sun Jan 06 2008 - 15:02:35 PST
This archive was generated by hypermail 2.4.0 : Thu Aug 21 2025 - 16:31:28 PDT