how to stream real time sensor data to goole earth?

[Neil]

I have a group of sensors that feed realtime event data to a web server.  I'd like to take that data and display it in real time to users on a website with the Google Earth Plugin.  For my application Google Earth needs to display the events in pretty much real-time (1-2 second latency max).  Is there a way to do this?

[barryhunter (KML Guru)]

What actully is this data? 

Imagery? Points on a map? Values? 

How are you plotting it? 

... anyway most likly you could use something like Web Sockets

http://en.wikipedia.org/wiki/WebSockets

providing the browser supports it - and stream data to the browser. The javascript would read it, and update the Google Earth view. 

[Neil]

points on a map and probably values.  This final product will likely be remote web-enabled sensors sending event data (target classification, velocity, etc) to a server that will update a web page in real time.  This web page will most likely use the Google Earth plugin to display the location of this event along with a bubble that has target information.  And it needs to be real time.

I'm actually still in the investigation phase of this project so I haven't written any code yet (I don't even have requirements yet).  From the limited research I've done so far, this seemed like it might be an issue.  Also, I haven't done any web programming in about 10 years so I'm very rusty on all this.

[Chad Burt]

No need to dive into websockets. You can just specify a refreshInterval on a NetworkLink:

http://code.google.com/apis/kml/documentation/kmlreference.html#refreshinterval