I have been trying to create .kap charts
to use with OpenCpn
from NOAA's weather
faxes (e.g. Atlantic area) using GE2KAP.
Those NOAA charts
use a Mercator projection
To make it easier, I crop the .tif files to 60/20° N latitude and 0/90°W longitude and save them as .jpg.
Using the following .txt file, I can generate the .kap charts with GE2KAP, but they seem off in latitude by a fair amount (about 2°, see pics)
Am I overlooking something ?
Here is the header for such a .kap chart
PS I know Nohal had those charts on his web site, but I can't find them right now.