Dynamic Server-Based KML Code Generator Method for Levelof-Detail Traversal of Geospatial Data

Geospatial data servers that support Web-based geospatial client applications such as Google Earth and NASA World Wind must listen to data requests, access appropriate stored data, and compile a data response to the requesting client application. This process occurs repeatedly to support multiple client requests and application instances. Newer Webbased geospatial clients also provide userinteractive functionality that is dependent on fast and efficient server responses. With massively large datasets, serverclient interaction can become severely impeded because the server must determine the best way to assemble data to meet the client applications request. In client applications such as Google Earth, the user interactively wanders through the data using visually guided panning and zooming actions. With these actions, the client application is continually issuing data requests to the server without knowledge of the server’s data structure or extraction/assembly paradigm.