In a message dated 5/25/99 10:27:45 AM EST, CHUCK_at_multitech.com writes: > an also merge files, and, of course, you can also > download waypoints, routes, and tracks from your GPS unit to > Topo!GPS and save them. A track I downloaded from GPS 12 to TOPO GPS showed me paddling though a head land with a 50 foot cliff. I tried a different Datum and it made it worse. The whole track seemed to be off one way or the other. Is it the Garmin or the TOPO maps or the Government induced error factor. Would a Nautical Chart program be more accurate for on the water tracks? *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.gasp-seakayak.net/paddlewise/ ***************************************************************************
Tom, How far off is it? Within 100 meters or so? I download my tracks into Delorme Street Atlas and sometimes they appear dead on, while other times I paddle across land, and sometimes both. Take a look at: http://www.tidalwave.net/~woodardr/Tripndx.html Choose trip #7 and then choose the Map. I don't think I really ever got within 30 feet of shore all the way around the lake. If you look at Trip #17 & #18, and then click on the 2 May Map you'll see a track that came very close to matching our course. One thing that may help a little is to set up your tracking function to only mark your position every one or two minutes (a little less jitter). If you need a more accurate fix, you'll need to invest in a DGPS reciever to feed into the GPS. If your computer can support it, you might try getting the DGPS program for use across the interent and mark the position of your house. Load that position in to TOPO and see how far off the Map is. I've been told that Delorme Street Atlas is sometimes off by 150 feet! (can't remember where I read that, so my memory could be playing tricks on me) Woody > -----Original Message----- > From: owner-paddlewise_at_lists.intelenet.net > [mailto:owner-paddlewise_at_lists.intelenet.net]On Behalf Of > Tomckayak_at_aol.com > Sent: Thursday, May 27, 1999 8:57 PM > To: CHUCK_at_multitech.com; paddlewise_at_lists.intelenet.net > Cc: njohnson_at_techniword.com > Subject: Re: [Paddlewise] Download to Garmin 12XL & Topo!GPS > > > In a message dated 5/25/99 10:27:45 AM EST, CHUCK_at_multitech.com writes: > > > an also merge files, and, of course, you can also > > download waypoints, routes, and tracks from your GPS unit to > > Topo!GPS and save them. > > A track I downloaded from GPS 12 to TOPO GPS showed me paddling > though a head > land with a 50 foot cliff. I tried a different Datum and it made > it worse. > The whole track seemed to be off one way or the other. Is it the > Garmin or > the TOPO maps or the Government induced error factor. Would a > Nautical Chart > program be more accurate for on the water tracks? > ****************************************************************** > ********* > PaddleWise Paddling Mailing List > Submissions: paddlewise_at_lists.intelenet.net > Subscriptions: paddlewise-request_at_lists.intelenet.net > Website: http://www.gasp-seakayak.net/paddlewise/ > ****************************************************************** > ********* > *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.gasp-seakayak.net/paddlewise/ ***************************************************************************
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