Its working principle is as follows: Browser dispatch HTTP request to Web server, and Web
server responds the request of client computer, and then returns the HTML page of request
surface. GIS assembly is used to accept user request, to carry out some basic space data
manipulations , through SOCKET and the GIS application server communication of
application logic layer to submit request and get data; GIS application server receive the
application request of client computer, and then ,according to application logic, Will ask
transformation number to ask to be rear according to storehouse
Through ODBC and database server interactive, it delivers handle results to client computer
application program.
The analysis and inquiry way of Web-GIS are the same as C/S’s.