| 面向关系数据库的道路识别算法研究 |
| |
| 引用本文： | 仰燕兰,叶桦,费树岷.面向关系数据库的道路识别算法研究[J].地理信息世界,2011(5):58-62. |
| |
| 作者姓名： | 仰燕兰 叶桦 费树岷 |
| |
| 作者单位： | 1. 东南大学自动化学院,江苏南京,210096
2. 东南大学自动化学院,江苏南京210096;东南大学复杂工程系统测量与控制教育部重点实验室,江苏南京210096 |
| |
| 摘 要： | 为适应面向关系数据库的GIS应用开发,不再依赖GIS二次开发组件对Maplnfo电子地图进行空间数据处理,提出了在关系数据库中重新组织并存储电子地图的图元数据,进而展开相关空间数据处理算法的研究.本文针对电子地网中表征道路的线对象,以道路结点为基本存储单元,融合路段走向,创建了路网数据库,将对目标点周边道路的识别问题转...
|
| 关 键 词： | 空间数据 关系数据库 通路识别 T-SQL |
Research on the Arithmetic of Road Recognizing based on the Relational Database of Spatial Data |
| |
| YANG Yan-lan,YE Hua,FEI Shu-min.Research on the Arithmetic of Road Recognizing based on the Relational Database of Spatial Data[J].Geomatics World,2011(5):58-62. |
| |
| Authors: | YANG Yan-lan YE Hua FEI Shu-min |
| |
| Institution: | 1,2(1.School of Automation,Southeast University,Nanjing 210096,China; 2.Key Laboratory of Measurement and Control of CSE of Ministry of Education,Southeast University,Nanjing 210096,China) |
| |
| Abstract: | For further using in the GIS application based on database,a new idea was proposed to build a relational database storing spatial data as much as those in the MapInfo digital map and to make some research on spatial data with independence on commercial GIS components for secondary development.Focusing on the linear objects which describe roads in the digital map,a database for roads was built with the road node as its storage cell and the road direction as auxiliary information.Then the problem of recognizing road segments around the target can easily be solved by searching road nodes which satisfied the querying conditions in the database.The arithmetic was divided into three steps of querying work in T-SQL.Firstly,candidate road segments were collected which were contained by a square area around the target.Then the best matched road segment in each of four directions was selected according to the road direction.Finally a comprehensive distribution of roads was described into text corresponding to those selected road segments.The experimental data shows that this arithmetic is capable of recognizing the road distribution around a target with higher accuracy,costing less processing time and lower system resources. |
| |
| Keywords: | spatial data relational database road recognizing T-SQL |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
