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I did not understand the link to groundspeak solution either. Sounded like something to be done during map making? I use mapsource and when I loaded CA Topo I got a double listing on my gps. Maybe someone can explain in simpler terms.

That solution is for the map makers, not the user. If you are a user and see this, you would want to contact the map author and report your findings. They are generally looking for your feedback to be able to update their maps.

The California TOPO is one example and the author does know of this issue. It's a trade off as that map is made from two mapsets that are layered; one a planimetric map and a transparent contour layer.

Thanks for the suggestion, in the case of my issue it just so happens that all of the suspect maps are from the same author so I will drop him a note.

I am working with unlocked img files that were downloaded from this site installed on my PC then installed to the GPSr via Mapsource.  I can tell you that all of the maps that are duplicates are in fact Transparent Maps (fwiw).  Also, the Costa Rican Map does not show up as a dup.

I will search out Mapedit and give that a try and see what I can see.

Thanks for all the responses,

BAT

Thanks for the response and the link... this has officially gone over my head    Guess I have some more homework to do.

I am experiencing the exact same problem    as seen here:



I have checked all of my FIDs and there are no duplicates, any other suggestions?

BAT