[Marble-devel] Marble Dgml

[Torsten Rahn]

Hi Konrad,

I guess you already know about:

http://techbase.kde.org/Projects/Marble/CustomMaps

and about our restricted maps repository as described in Dennis' most recent 
blog entry where more advanced dgml features are used.

So if those features are not covered yet then it's probably better to extend 
the dgml storageLayout tag accordingly for support of "leading zeros" and 
"Level Zero properties" (where "Level Zero" refers to the starting image - 
which in Marble right now is the full worldmap) . I think that would be easier 
and probably better than starting from scratch with TextureLayer (and might 
even result in a few generic patches for the MarbleProject if possible? ;) 

Best Regards,
Torsten

On Donnerstag, 16. August 2012 15:34:47 Konrad Enzensberger wrote:
> Hello Thorsten,
> 
> no, not only leading zero.
> The main question is, if  the tile path allways starts with zoom folder 0,
> regardless of the geographic area of the map, can this be configured in
> dgml?
> 
> For example, if you have a big raster image from munich and you crunch this
> into osm map tiles, according to osm folder structure, the result should be
> something like:
> .\13\4111\3027.png   -  this is the starting munich image
> .\14\....\...    -  starting image tiled into four new images
> .\15\....            and so on
> 
> And this is what the ArcObject sdk is creating:
> .\L0\R0000\c00000000.png   -  this is the starting munich image
> .\L1\R0000\.....    -  starting image tiled into four new images
>       \R0001\....
> .\L2\R0000\....
>        \R0001\...
> 
> If you crunch a world raster image with ArcObjects, same folder structure
> like above is created.
> They do not respect the real geographic area from raster image, ArcObject
> is allwas starting with level 0 (L0) ,
> So for lat/long calculation of  map tile corners, you can not simple use
> the folder/filename like this is possible for
> osm tiles.
> This must be done with an corresponding xml file, also created by
> ArcObjects sdk.
> 
> The question is, is it possible to use dgml and special tags to load such
> map tiles?
> Or better dynamically create a TextureLayer ?
> 
> br, konrad
> ----- Original Message -----
> From: "Torsten Rahn" <tackat at t-online.de>
> To: <marble-devel at kde.org>; <e.konrad at mpegcode.com>
> Sent: Thursday, August 16, 2012 3:09 PM
> Subject: RE: [Marble-devel] Marble Dgml
> 
> 
> So mostly your question is about having support for leading zeros in the
> tile path? I don't know whether this is supported by Marble yet. I'd just
> like to point out that the old  Worldwind tile format had leading zeros as
> well.
> Sent from my Nokia phone
> -----Original Message-----
> From: Konrad Enzensberger
> Sent:  16/08/2012, 14:05
> To: Marble
> Subject: [Marble-devel] Marble Dgml
> 
> 
> Hi all,
> 
> maybe one of you can give me a hint how to
> solve following task:
> 
> For the GIS app i am developing i need to add ESRI mxd maps.
> Mxd is a container which adds several vector/raster layers to a map.
> With ESRI ArcObjects sdk it is possible to crunch the mxd maps into
> map tiles.
> These map tiles are similar to osm tiles, the main difference is that
> the tiling schema created by the ArcObjects sdk does not match to
> tiling schemas used by osm, google or other online maps.
> 
> for example:
> regardles if you use osm or google or nokia maps,
> a map tile located in the same folder:
> \zoom folder\longitude index folder\latitude index tile name
> are allways describing the same area in geocoordinates.
> 
> The ArcObject sdk also creates such folder structure:
> \zoom folder\longitude index folder\latitude index tile name
> 
> But regardless if you crunch a worldmap or a city map,
> the created zoom folder allways starts with 0 to n.
> For example when i crunch a munich city map, the first map tile
> showing the whole city is located in:
> .\L0\R0000\c00000000.png
> Next level is:
> .\L1\R0000\
>       \R0001\
> 
> Now i was wondering if it is possible to config a dml file the way,
> that this folder structure can be used to load the map tiles,
> 
> thanks for support,
> 
> konrad
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