Urban Planning Cad System Research And Development

This article is built on the base of resolving the practical difficult problems in city planning design. It also combines the current development of CAD technology.This article mainly resolves these problems of city planning design:the standardization of city planning drawing, the auto-generation of city planning statistic tables, the design of professional drawing database, and the definition of special linetype for city planning design.1. Oneness The designers can design normative product using this City Planning CAD System(CPCAD), which can strongly contract the serial steps of city planning design, advance the abilities to communicate among the designers and the readability of the drawing.2. Easiness The system appearance is concise and beautiful. The system automatization is high. The users can design a perfect drawing through some simple selection and input only. The users operations follow the routines of visual operations of Windows and the users' habit of operating AutoCAD.3. Practicability The functions of this system can resolve the actual problems in work. It can separate the designers from onerous work.This system uses the ObjectARX Development Kit of AutoCAD 2000. It is developed by VC++ and used in AutoCAD 2000. This Method resolves the actual problems in city planning design. The CPCAD actualize the following functions:1. Standardization of Design The standard drawing-frame designedthrough the CPCAD abides by the standard of city planning drawing. It also actualize the managing and application of standard layers.2. Professional Drawing Database The CPCAD develops a cityPlanning professional drawing database on multi-fork tree structure through which can easily manage and use the standard drawing block in common use.3. Auto-generation of City Planning Statistic Tables This is oneof the emphases of the CPCAD. By the character of city planningstatistic tables, this article brings up a new technology of auto-generation of city planning statistic tables on the base of object. This technology perfectly resolves the problems of auto-generation of city planning statistic tables.4. Definition of Sewage and Rain Linetype This article perfectly resolve the problem that the designers must use much time and energy but get bad effect in drawing sewage and rain line in city planning design by the technology of definition of AutoCAD linetype.The actualization of these functions has great realistic significance on the development of city planning. It also has positive effect on promote the study and application of CAD in the field of city planning design.