Create permalink into map content

[forman]

@gunbra32 said: "a tool to mark features or artifacts in the data. While we described some kind of dialogue box in the proposal, I could now image to rather create some kind of permalink in the data, similar to the code snippet used for accessing the data programmatically. User may highlight data by drawing a geometry on the map and the permalink contains the server url, ds, var, time, and shape. this 'permamlink' could then be used in the JH to cut out the data and further analyse. Likewise, with such a permalink, the viewer should be able to visualise exactly the feature."