Additional bathymetric data.

[ehrenfeu]

(This is a meta-issue, as I don't know where else to put it and the information is way too important to be buried in the list archives. The wiki is less appropriate I think as this is something that will require implementation work to be done.)

There have been a couple of mails to the developer list mentioning additional sources of bathymetric data:

• Natural Earth Data - used by @rahra with smrender (see the related thread on the ML)
• Land Information New Zealand (LINZ) - mentioned by Christian Wagner (see the message on the ML)
• European Marine Observation and Data Network (EMODnet) - Martin suggested to use their WMS services (see the message on the ML)