Handling multiple maps hierarchically

[Tamas Szekeres]

Dear Steven,

Thank you for your suggestions.
I haven't work too much with WMS yet, but as far as I know if I have 400
maps (WMS layers), mapserver will start downloading all of the maps as a
raster image regardless of that only some of the maps will be drawn at the
same time (using proper MAXSCALE settings). Another performance issue is
that the high number of maps will appear in the filesystem as temporary
image file.
With tileindex the filtering of the maps falling out of the display area
takes place earlier than drawing of those maps.
I think it would be considerable to support drawing raster layers given
a .map file as the data source, so tileindex support would come into
account automatically.

Worthy of note that with the current Mapserver release (4.6.0) there is a
minor bug I've run into that the 2.nd WMS layer is created with ambiguous
temporary file name, see Bug #1312

Tamas Szekeres


On Mon, 22 Aug 2005 10:21:43 -0500, Steven Monai
<stevem at SPATIALMAPPING.COM> wrote:

>Tamas:
>
>MapServer has both WMS server and client capabilities. Therefore, if you
>configure your maps as WMS services, you can create an "overview" map that
>composes those services as raster layers, much as you suggest. The idea of
>having a tileindex of maps won't work though, since tileindexes only work
>for local rasters or shapefiles (AFAIK).
>
>Hope this helps,
>-SM
>--
>
>On Fri, 19 Aug 2005 15:36:24 -0500, Tamas Szekeres
><szekeres.tamas at FREEMAIL.HU> wrote:
>
>>Is there any way to join multiple maps in one map.
>>In my case I have a map of the country and a large number of maps (~400)
>>of the cities and villages. It would be desirable if the proper map could
>>be drawn over the map of the country if the map is zoomed to the location
>>of the city or village. This should be extended to more levels in
>>hierarchy, eg. using a map for the whole continent and ensuring to draw
>>the map of the country over the map of the continent after zooming to the
>>appropriate area.
>>
>>I think it would give a solution if a map could be drawn as a raster
layer
>>in other map, and a tileindex file could contain the .map files for the
>>given locations.
>>
>>Any suggestions would be appreciated,
>>
>>
>>Tamas Szekeres