[Marble-devel] [PATCH] LatLonBoxServerLayout

[Bernhard Beschow]

Hi Marble devs,

it seems like the reviewboard has some trouble with uploading patches, so I just post it here.

Inspired by tackat's proposal for quick & dirty WMS [1] support, I've created a ServerLayout class which requests tiles based on a latidude/longitude box. Currently, it only supports pairs of EPSG:4326 coordinates (better known as GPS coordinates).

Since WMS parameters are passed in the query part of an URL, I added a query attribute to the downloadurl-tag. Due to some limitations, its value has to be web-encoded, which is probably a pitfall when creating a dgml file. If you find a better way, please let me know.

For an example dgml file, see [2]. You should at least zoom to level 5 and you should have Saxony focused. If you zoom in very deep, say 17-20, you will notice artifacts like warped lines etc. which are probably caused by rounding errors. If you know how to avoid them, please let me know as well.

Have fun!

Greetings,
Bernhard

[1] http://en.wikipedia.org/wiki/Web_Map_Service
[2] http://www.gitorious.org/marble-restricted-maps/wms-maps/trees/master
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