Originally Posted by osirissail
... the "old" charts are the exact same charts being sold as "new." Other than Explorer Charts and Wavy Line Charts, there have been no new charts made in decades ... they just change the way they record
and protect the CD's/chips/whatever. Most of the "new" charting programs will not read the really ancient e-charts - the original Maptech
charts with HDR files, which include many hundreds of bays and coves and regions which the "new" charts simply ignore ...
I'm a bit puzzled by some Maptech Bahamas
charts I've encountered. The first set seems pretty straightforward. It contains the Explorer charts put out by Monty and Sara Lewis. They are dated 2001 and are in BSB
format (.kap and .bsb). This CD-ROM also contains folders named "Marine" (.bmp), "Overview" (.jpg), "Pictures" (.oph), and so on. It also features a small viewing program. I am pretty sure this CD will run on Capn 8.3, SeaClear II, OpenCPN
Navigator Lite, etc. I am familiar with the Explorer charts from previous use.
The second CD in the set seems to have the types of charts you referred to above. These files are dated 1998. There is a folder named "Charthdr" that contains .hdr files which I presume are the individual registration
files for each chart. The charts themselves are in individual numbered folders (e.g., "M1146150) and contain files of type .A01, .A02, ... .L12, etc. Maptech's Offshore
Navigator Lite can see and display these directly, but Capn 8.3 and OpenCPN
do not seem to recognize them. What am I looking at here?