[OSGeo-Discuss] KML Streaming server with OS Software
ak at opengeo.org
Sat Dec 5 04:53:02 PST 2009
Cédric Moullet wrote:
> I'd like to know if there is any Open Source Software that is able to
> stream huge KML file.
> The use case is the following: we'd like to diffuse a 100GB KML file
> through the Google Earth PlugIn. Of what I know, the only way is to
> create a KML server streaming component in order to diffuse this
> content in web app. Is there any OS solution available ?
The Google Earth plugin will probably choke after reading 10 to 15
mbytes of KML, at least that's what the standalone version of GE did the
last time I checked.
What you probably have to do is divide the data across a pyramid
connected by network links. We spent a fair amount of time doing
"regionating" in GeoServer, i.e. figure out what data should go into
what level of the pyramid, so that it aggregates on the display as you
zoom in. It's doable for any specific dataset, but a generic solution
that you can just throw a database table at is tough. The largest we
managed to pulish was tables with 1 to 2 million features.
If you have polygons you must also ensure that they re not too complex,
i.e. the GML representation should be 500 kbyte or less.
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