Originally Posted by teneicm
Thanks bdcat! That helps explain why they won't load. If anyone knows how to make them useable with OpenCPN, I'd love to hear about it.
The file formats that OpenCPN can and can't handle are explained here:Chart Formats | Official OpenCPN Homepage
HDR/pcx charts, that you have, have been discussed many times in this forum. The forum search function is your friend.
I think this post:
Open Chart Standard
, was one of the first.
The work flow is: Join all the pcx-tiles to one big picture. Convert this picture to a chart. See the chart conversion manual on opencpn.org
A script, sort of, is available to join the tiles. Look here,
Note that this script is for Linux
. It may be possible to do a windows version.
It is important to understand what the script does, as the tile naming scheme may have to be adjusted to fit the individual hdr chart.
So all of this is quite a lot of work to acquire 20 years old DMA charts. Certainly more so, if you start from scratch.
If you have access to CM93 charts, there is no need to go through all this, as basically, these charts are already included.