The digital charts are made from the paper charts. If anything, they are
less accurate than the paper charts. Raster charts are just scanned paper
charts so the accuracy is about the same in terms of information. Their
registration can be off a little. . Vector charts are digitized
paper charts and do contain errors and less detail. My CMAP-NT+
charts of the ICW has many references to markers like R3 and G4.

Doug

wrote in message
oups.com...
I've got a Lowrance LMS320 and I've been thinking about buying some of
these Navonics charts for it. Unfortunately, I would need the lakes
and coastline of Texas. That's 2 sets I think. $$

Anyway, my question is regarding the level of detail that these maps
provide. Are they simply electronic versions of the kinds of maps that
I see at the sporting goods stores, Hotspots etc. or do they actually
provide a lot more detail than those paper maps have.? Underwater
structures, hazards, etc?

I suppose I could take my map in hand and go to a Marine store and look
at demo of Navonics for the same area. Has someone done that or made
the comparison I'm asking about.

My feeling is that if all it is is a electronic version of what's on
paper then maybe its not really worth it. I can usually correlate
pretty well from the Mapcreate maps that I bought and other paper maps.
Its a matter of information. If there is actually more information in
the Navonics stuff then it may be worth it. I got a feeling that I'll
always want paper anyway.

tks
Don