摘要
地图数字合并是指在同名实体匹配的基础上,调整相关地物实体的几何位置,以实现同一地区不同来源地图数据库的集成和信息融合。城市地图数据有其自身独有的特点,因此在对城市地图数据库进行合并时,不仅要消除不同图形空间数据之间的差异,还需要精确保持实体原有形状。本文提出了一种基于最小二乘平差的合并算法,采用附带条件的间接平差方法,通过迭代以求得实体调整合并后的空间坐标。通过实验,该算法不仅能较大程度地消除空间数据差异,并且较好地保持了原有实体的形状。
The combination of digital map refers to adjusting the position of geometric features associated entity on the basis of the matching entity,which can achieve the information integration and map fusion from the different sources but same region.City map data has its own unique characteristics,therefore when merging the city map database,we not only need to eliminate the differences among various graphic spatial data,but also need to keep the original shape of the entity precisely.This paper proposed a merging algorithm based on the least squares adjustment,which used the indirect conditional adjustment methods to seek after the merger of the entity adjust space coordinates through the iteration.Finally,an experiment was conducted,which demonstrated that this algorithm can not only greatly eliminate the differences of the spatial data,but also keep the original shape of the entity in a preferable manner.
出处
《测绘与空间地理信息》
2011年第2期214-216,219,共4页
Geomatics & Spatial Information Technology
