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Posts: 307
| crackpot, it depends if the lake you are fishing is high defenition with either lakemaster or navionics. The HD maps have been mapped independently by the two companies and are therefore more accurate. If it is just a standard map then they can be off due to errors in the map when it was first created by the DNR. When DNR maps are put onto chips there are already several sources of error from the original DNR map add to that some error in your GPS and it may look like you are on islands. When in fact you are not. So the problem is not neccisarily the fault of Lakemaster or Navionics, but are multi faceted errors that build up through the process of trying to digitize old DNR maps onto modern GPS coordinates.
If you are on islands on a HD map it probably means someone screwed up when they were doing the survey. Or there is an issue with your GPS accuracy. Remember that when your gps shows an error of 20 ft (or whatever it may be) that is +/- 20 ft. So in theory you create a waypoint it could end up on one end of the error when you come back to fish your boat could be on the other end of the error for a total of 40 fist error. Although it is pretty unlikey that this would occur.
Mark you may be out of luck with the LX19, but I don't know for sure.
Edited by Plunker 1/11/2010 5:08 PM
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