地图数据缩编更新模式是缩编更新技术流程设计及软件模块开发的基础。根据缩编和更新对象的不同归纳了缩编更新的4种模式,结合当前地图自动综合理论技术水平与数据组织管理现状。认为现阶段最合理的模式为新旧数据叠加缩编更新模式。基于该模式分析道路数据缩编更新的技术流程并开发了相应的软件模块,应用于国家1:5万地理信息系统中道路数据的更新,从而验证了该模式的可行性。
The map data can be updated using the new data at larger scale based on automated generalization method. For developing the software of this updating way, the classification and applicability of updating modes are investigated firstly. According to the objects generalization and data update,four modes are presented, i. e. a) generalization and substitute, b) integrating the result of generalization and the old map, c) incremental generalization for updating, d) overlapping the new and old data and generalization for updating. The mode of the last one is applicable considering the current status of map automated generalization and the management of maps with different scales. Based on this mode, the process of updating road data is proposed, and the software module is developed, which applied to update road data in 1:50 000 map from 1:10 000 road data. The case verifies this mode is practical.