城市电子地图多尺度自动缩编方法

随着智慧城市、地理信息公共服务及地理国情数据等政务信息逐步公开，作为各类政务信息发布基础的城市电子地图在多尺度展现时，只能通过关闭、选取要素来实现，这种未进行制图综合的做法导致要素在逐级放大过程中，会出现跳跃性丢失和细节破碎的现象，既不符合地图表达要求也难以满足用户视觉体验。本文提出了一源数据多尺度自动缩编的技术方法，构建了最优化的"统一源头、一致派生、无级表达"技术体系，实现了城市电子地图联动更新和多尺度展现，节省了大量人力和物力，为最大限度地发挥测绘地理信息集成与服务能力提供保障。

A Study on the Automatic Generalization of Urban Multi-scale Electronic Map

With the openness of the government information, such as smart city, geo-information common services, and geographical conditions data, the city electronic map, which is considered to be the basis of all kinds of government affairs, can only be illustrated by shutting down and selecting elements in multi-scale display. This leads to the jumping loss and detail fragmentation phenomenon for the elements in the scaleless display. Therefore,it cannot meet the requirements of cartographic representation and satisfy the user's visual experience. This paper presents an automatic generalization method,which constructed a technology system featured unified source, consistent derivation, scaleless representations. This system realizes the linkage renewal and multi-scale display of urban multi-scale electronic map. To some extent,it will play an important role in maximizing the geographical information integration and service capabilities of surveying and mapping.