高精度道路数据压缩中空间方向关系的维护方法  

Maintenance method of spatial directional relationships in high precision road data compression

作　　者：何捷 郭庆胜[1] 赵常雄 夏华林 童莹 HE Jie;GUO Qingsheng;ZHAO Changxiong;XIA Hualin;TONG Ying(School of Resource and Environment Science,Wuhan University,Wuhan 430079,China;Beijing NavInfo Polytron Technologies Inc.,Beijing 100049,China)

机构地区：[1]武汉大学资源与环境科学学院,湖北武汉430079 [2]北京四维图新科技股份有限公司,北京100094

出　　处：《测绘工程》2020年第1期31-36,共6页Engineering of Surveying and Mapping

基　　金：国家自然科学基金资助项目(41871378;41471384)

摘　　要：高精度导航地图的精度降低时,导航道路数据的压缩非常重要。文中提出一种高精度道路数据压缩中维护道路空间方向关系的方法。该方法首先采用锥形模型描述道路端点处和内部形状点处的空间方向关系,然后根据实际导航需要,利用局部空间场景内空间方向关系相似性原则,分别对端点处和形状点处的道路进行空间方向关系的调整,以使在精度降低时道路局部空间场景内空间方向关系变化最小。最后,以上海市的局部高精度道路数据验证文中所提出的空间方向关系维护方法,实验结果表明,该方法能够在高精度道路数据压缩时较好地维护道路的空间方向关系。Compression of navigation road data is very important when the precision of high-precision navigation maps is reduced. This paper proposes a spatial directional relationships maintenance method for high precision road data compression. The approach proposed firstly describes the spatial directional relationships of the end points and the internal shape points of road by a cone model. Then according to the actual navigation needs, the method adjusts to the spatial directional relationships of the road at the end points and the shape points respectively based on the principle of spatial directional relationships similarity of a local spatial scene, so that the change in spatial directional relationships of local spatial scene is minimum when the precision of road is reduced. Local high precision road data in Shanghai are selected to evaluate the validity of the proposed method. Experimental results show that this method well maintains spatial directional relationships of the road in high precision road data compression.

关 键 词：导航地图 数据压缩 道路 空间方向关系 

分 类 号：P208[天文地球—地图制图学与地理信息工程]