摘要
针对导航电子地图数据增量更新的方式和特点,设计了多尺度—多图块—多专题—多层次(level—parcel—layer—grade)的导航电子地图数据模型。该模型不仅能支持变化数据在导航数据库中的快速更新,而且当数据发生变化时,可获取最小的数据变化增量,满足用户终端更新时的最小数据传输要求。
In view of the the characteristics and methods of incremental updating of nvigation electronic map,the data model of supporting Incremental updating of nvigation electronic map based on multi-scale,multi-parcel,multi-thematic,multi-grade(level—parcel—layer—grade)is designed.The model can not only support the rapid updating of the change data in the navigation database,but also can obtain the minimum data change increment when the data was changed.Meet the minimum data transfer when the user terminal is updating data.
出处
《北京测绘》
2016年第3期126-128,109,共4页
Beijing Surveying and Mapping
关键词
导航电子地图
增量更新
数据模型
物理存储
nvigation electronic map
incremental updating
data model
physical storage
