I know we spent a lot of time grinding the topic of quilting transmerc chart back in the spring during the 2.1 development.
I think Dave and others (temporarily?) gave up, but I would like to bring the subject back up and either get it declared as dead duck, impossible to do, or maybe lift
it up as a possible enhancement for the next version.
Dave wrote back in April:
OpenCPN Version 2.1.0 Beta
a. Quilt for TMerc: This needs some discussion. We cannot accurately include a TMerc chart in a Mercator quilt without a costly reprojection of the TMerc chart into Mercator. On the other hand, if all the charts in the quilt are TMerc, then we can build a reasonable TMerc quilt. This will be the case in some Scandinavian areas. This needs coding...
So, how do we handle the mixed-projection case? Ideas?
Why not use a combination of quilt and not quilted?
Use Tmerc quilted and show the Mercator charts on the chart selection bar.
This would show there are Mercator charts showing the same area while having the possibility to quilt the Tmercs.
I think it would be real nice with quilted tmercs, at least to have the tmercs quilted with other tmercs.
I wrote a small notice on a Swedish site about the release and the first reply was "nice with quilting" which of course will not work for most Swedish charts.