I think this issue has been discussed a few times. By Rhoel Asia
the last time I guess. But I'm so impressed by the functionality and coding that I thought I wanted to show a few examples. So please excuse
sk_brjng.jpg is a marine
chart of a port close to my home town. If I open Google Earth
you can see a satellite
image like in sk_brjng_GE.jpg. If I use the 'groundoverlay' feature in Google Earth
I get the picture as in sk_brjng_GE_O.jpg. The KML-file contains the following segments:
All raster based marine charts
can be 'groundoverlay'd like that. And I think it gives incredible information to see marine chart information on real life satellite images
. See another example in GE_snaevringen_med.jpg. It's actually the 'color' that gives the degree of transparency to the satellite image.
I have seen the functionality in the fugawi software
as an unsupported feature, - however still impressive and simple.
For vector charts I think that www.earthnc.com/online
has shown that a full KML-based interface/layer of marine information is possible. I guess that a transformation from the S57-vector objects to KML-segments has been programmed. But my knowledge is unfortunately not deep enough. I'm still impressed by the combination og satellite images
and marine information.
My suggestion is (of course) to make this idea appropriate for OpenCPN
That is a 'button' showing the active marine chart as ground overlay in Google
earth. Easy for raster charts. For vector charts I guess more consideration is necessary.
Thanks for letting me tell my story..