I'd also like to know any other sources relevant for navigation
The TMS tile format is in wide spread use in GIS (Geographic Info Systems) and google
microsoft? all use it.
OSM is a maturing open source mapping colaboration using TMS. I use it on my android phone
- osmand is the app. A lot of info is constantly being added including gps
tracks users contribute. Similar to google
maps together with voice directions etc and can pull in other tile maps like google sat etc. Open Sea map is a spinoff but its lacking traction I suspect thru not enough users and the lack of open hydrographic sources. Last time I looked some time back from memory there were only some small areas in Europe
which seemed to have any detail.
It uses standard tile raster format 256x256 pixel tiles almost identical to google maps/sat but also has a binary vector format. In raster as you zoom in each small scale tile is swapped out for four higher res tiles and so on so there is a bit of repetition redundancy and storage requirement grows very fast.
Probably the most usefull addition to OCpn would be to pull in aerial /satellite photos seamlessly via the native tile format. Programatically it should be relatively easy- although beyond me - then there are the copyright
issues. The current
work around from what I gather on the forum is to create Kap files of images
which are then accessible to OCpn. I've done it manually before but its a pain. Not sure if the google earth
is any easier as I have not tried it.
Having satellite images
is invaluable especially in reef areas such as Indonesia
where charting is very poor. Virtually ignored the Cmap chart and eyeballed with sat pics.