摘要
为满足铁路专业人员在移动终端的数据使用需求,实现电子地图离线条件下的快速查找与检索,对空间数据进行轻量化压缩存储。通过建立金字塔模型并采用JPEG2000标准,实现栅格数据轻量化和快速检索,采用Douglas-Peucker算法、几何坐标变换、BWT算法和LZW算法实现矢量数据轻量化,选取SQLite数据库对压缩后的空间数据进行存储。通过建立移动端铁路电子地图离线检索系统,证明了该数据轻量化存储技术的可行性。
Lightweight compression storage is realized on spatial data to meet the requirement of data usage on the mobile terminals by railway professionals,achieving fast search and retrieval on electronic maps in off-line conditions.Lightweight and fast search are realized for raster data by establishing a pyramid model and applying JPEG2000 standard.Lightweight is realized on vector data by applying Douglas-Peucker algorithm,geometric coordinate transformation,BWT algorithm and LZW algorithm.SQLite database is chosen for storage of compressed spatial data.Lightweight data storage technology is proved feasible by establishing the off-line retrieval system of electronic railway maps on the mobile terminals.
作者
年秋慧
王英杰
李聪旭
封博卿
NIAN Qiuhui;WANG Yingjie;LI Congxu;FENG Boqing(China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Computing Technology Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)
出处
《中国铁路》
2020年第7期131-135,共5页
China Railway
基金
中国铁道科学研究院集团有限公司电子计算技术研究所基金项目(DZYF18-43)。
