Hi Chad!
With ajax technology I mean one solely open up data that are in the
mapview, the rest is ignored..

I have a lot of data, that is the problem, so I have sofar written a
rough mimic of Ajax myself instead to be able to handle the data in
Googlemaps.
Splitting up the data into many kml files and put a listener which
ones are in the map view, then closes those that goes out of the view
(as Goolgmap only accept 10 connections)
It works ok but I figured it would be smother with this functionality
"built in" so to say.. not at least when doing an update of the
data...

In common GIS technology on the web today this is usally done like
that - a request for data that are within in a certain x-y boundary so
the whole truckload does not have to be loaded, for performace issues.

How about using webservices? is this possible in Googlemaps? then one
can send requests to vectordata within specified boundaries.

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