Based on the characteristics of digital engineering geological map in the water conservancy and hydroelectric field, we discuss gradation-coding program of layered management of digital engineering geological map. Furthermore, the classification of the attribute data is supplemented, and the principle and scheme for working out the structure of attribute table are provided.
This paper introduces a method for the intelligent recognition of CAD graphics based on AutoCAD, ActiveX Automations and Reactors. According to the quantity information embedded into the CAD graphics database, the related quantity information can be extracted and a digital project management scheme is automatically generated.
By analyzing the generality in the construction of digital library and digital city, combining the problems exist in the digital city construction, this paper probes into the functions of library in the construction of digital city. It also proposes some suggestions for city digitization project to draw experience from the construction of digital library, so as to quicken the construction of digital city and promote the development of social informatization.