文献类型：期刊文献

中文题名：基于激光雷达的地理空间要素识别算法研究

英文题名：A Study on Recognition Algorithm of Geospatial Features Based on Lidar

作者：杨棉绒[1];牛丽平[2]

第一作者：杨棉绒

机构：[1]新乡学院计算机与信息工程学院,河南新乡453003;[2]河南师范大学计算机与信息工程学院,河南新乡453003

第一机构：新乡学院计算机与信息工程学院

年份：2020

卷号：42

期号：12

起止页码：56-61

中文期刊名：现代雷达

外文期刊名：Modern Radar

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：河南省科学技术厅科技攻关项目(182102210495);基于垂直搜索引擎的农业信息推荐关键技术研究基金资助项目。

语种：中文

中文关键词：地理空间;识别算法;大数据;激光雷达;DP算法

外文关键词：geospatial;recognition algorithm;big data;lidar;DP algorithm

摘要：为提升数据利用价值,增强地理空间数据库数据信息完整性,需对地理空间数据库中各要素进行挖掘、定位。文中提出基于地理空间结构的综合规则、空间基本数据特征语义的综合规则提取方法和法则,针对现有地理空间数据定位方法中存在定位结果耗时较长、误差较大等问题,基于激光雷达,以数据流移动地理空间数据库为研究背景,对地理空间要素进行高效准确定位。构建动静结合的矢量数据多尺度处理模型,使相邻尺度在进行切换过程中,由于尺度切换所导致的视觉跳跃感可降低和缓解。因而文中提出一种新型关键检测点所进行识别的拓扑一致性面状图斑作为研究计算基础,通过DP算法进一步优化,实验表明,优化的DP算法通过减少检测点数量、缩小检测点搜索范围,尤其是对潜在的拓扑冲突进行检测时,可减免对于拓扑一致性校验的频率,使整体简化速度得到极好改进,化简效率得到提高。
In order to improve the value of data utilization and enhance the integrity of geospatial database data,it is necessary to mine and locate the elements in geospatial database.In this paper,the method and rule of extracting comprehensive rules based on geospatial structure and feature semantics of spatial basic data are proposed.Aiming at the problems of long time-consuming and large error in the existing positioning methods of geospatial data,based on lidar,taking the data flow mobile geospatial database as the research background,the geospatial elements are located efficiently and accurately.The multi-scale processing model of dynamic and static vector data is constructed to reduce and alleviate the visual jump caused by scale switching between adjacent scales.Therefore,a new type of topological consistency patch which is identified by key detection points as the research and calculation basis is proposed in this paper,and is further optimized by DP algorithm.Experiments show that the optimized DP algorithm can reduce the number of detection points,narrow the search range of detection points,especially for the detection of potential topology conflicts,which can reduce the frequency of topology consistency verification and make the whole system as a whole.The speed of simplification and the efficiency of simplification are improved.