It is an important direction in the area of WEBGIS that client and server-side design of mixed-mode WEBGIS.The technology of the mixed mode application framework of WEBGIS designed by BHO technology and client/server application model of division and cooperation was introduces,with the way the client BHO calculation and the interface layout and results,and with this way the of local data loading was analyzd,finally,with the examples,thi...