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. Companies which produce GPS units quickly realized that they could enhance their revenue stream (e.g.: make more money) by making their units so that they only accept proprietary mapping data. They they create that proprietary data from the free US charts and cut deals with the copyright owners of other navigational data. Garmin has their Blue Charts series and others use the C-Maps. What I'd like to know is if there are GPS units out there (or Chart Plotters - some of which may not have a built-in GPS - just so you know) that easily accept the non-proprietary navigational data. This is, of course, for my mutha.... er, mother ship project. :) Craig Jungers Moses Lake, WA *************************************************************************** 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 Thu Jan 03 2008 - 07:01:31 PST
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