市政道路图件管理信息系统设计与实现

本文目标是设计和建立郑州市市政道路图件管理信息系统,对系统的搭建、数据的组织与更新维护等方面做了详细的介绍,为市政管理的信息化建设提供有效的借鉴作用.

Schematic Road Network Map Progressive Generalization Based on Multiple Constraints

Multiple constraints for schematic road network map cartographic design are analyzed and summarized. Based on this, a set of quantitative criteria are set up and a new road network generalization method including progressive selection and displacement is proposed. Furthermore, topological checking methods for road networks are researched. Based on these constraints, the points in a road network are classified, and a satisfactory and effective schematic map is designed in a con- crete experiment while maintaining topological consistency of the road network between the original and the schematic map