Research And Application Of WebGIS Based On SVG And AutoCAD

Must using information technology transforming and improving traditional mining industry represented by coal mine,nonmetallic minerals and nonferrous metal mineral, clearly stated in the National's Eleventh Five-year Plan Period of Informatization Development Planning.To construct Web GIS for coal mine is the only way of coal mine informatization.AutoCAD Design drawings are precious documents that run through whole of mine construction,mine development and production.In the current of information construction of coal mine,however,the AutoCAD drawings are not sufficient to be utilized.The research situation of technology of Web GIS,SVG and AutoCAD secondary development is analyzed firstly,in order to make full use of AutoCAD drawings in coal mine informatization to construct Web GIS conformed to coal mine reality.Then, according to AutoCAD secondary development study,the scheme is given that to access DWG format files by ActiveX or access DXF format file directly.Mutual transformation theory is proposed by analyzing layer,entity and attribute of SVG and AutoCAD.Basic principle of AJAX and technology of Microsoft ASP.NET AJAX are studied and real-time communication in B/S mode is achieved.Finally,Web GIS based on SVG and AutoCAD is constructed successfully:on client,display,zoom,translation of map and other basic functions of Web GIS are achieved by technology of SVG;on web server,mutual transformation of SVG and AutoCAD and synchronization of SVG, AutoCAD and database of attributes are achieved by web service;synchronization of client and server is based on Microsoft ASP.NET AJAX.Combined with construction process of construction of inclined drift in Wangfenggang mine of Huinan Mining(Group) CO.,LTD.,the system was confirmed by applications in engineering.It is shown that Web GIS not only make use of precious documents already existed,but also is closer to actual situation of coal mine. Figure 43 table 14 references 75...