With the appearance of Internet promotes GIS on both technical aspect and applied aspect,traditional GIS encounters huge blocks on Internet platform. In the field of computer ,Distributed Computing technology has seen...With the appearance of Internet promotes GIS on both technical aspect and applied aspect,traditional GIS encounters huge blocks on Internet platform. In the field of computer ,Distributed Computing technology has seen fast progress with three industrial standards. And on GIS field,openGIS Consortium has drawn a series of specifications,which,combining with the three standards,provides enterprise GIS application with foundamental facilities. The authors firstly illustrate the architectures with three models-thin clent,medium client and thick client,then present a mixed model which transfers both vector and raster data between client side and server side with the advantage of high interactivity in clinet and medium data transfer. Afterward,the authors give two enterprise schema based on two standards :COM+and EJB. Finally,the authors list some key technologies which will affect the future WebGIS-openGIS,XML, Windows. net, CORBA, EJB,etc.展开更多
This paper presents the idea of software reuse and object-oriented analysis technology and disscusses the development step of object-oriented analysis ,as well as the implementation model of enterprise's MIS which...This paper presents the idea of software reuse and object-oriented analysis technology and disscusses the development step of object-oriented analysis ,as well as the implementation model of enterprise's MIS which included four parts:objects model,control model ,interface model and implement explains.展开更多
文摘With the appearance of Internet promotes GIS on both technical aspect and applied aspect,traditional GIS encounters huge blocks on Internet platform. In the field of computer ,Distributed Computing technology has seen fast progress with three industrial standards. And on GIS field,openGIS Consortium has drawn a series of specifications,which,combining with the three standards,provides enterprise GIS application with foundamental facilities. The authors firstly illustrate the architectures with three models-thin clent,medium client and thick client,then present a mixed model which transfers both vector and raster data between client side and server side with the advantage of high interactivity in clinet and medium data transfer. Afterward,the authors give two enterprise schema based on two standards :COM+and EJB. Finally,the authors list some key technologies which will affect the future WebGIS-openGIS,XML, Windows. net, CORBA, EJB,etc.
文摘This paper presents the idea of software reuse and object-oriented analysis technology and disscusses the development step of object-oriented analysis ,as well as the implementation model of enterprise's MIS which included four parts:objects model,control model ,interface model and implement explains.
