基于MVT的矢量瓦片免切片技术  

A slice-free technique for vector tile based on MVT

作　　者：胡晓曦 蔡思腾 刘刚[2] 边丁丁 罗智勇[2] 何敬[2] HU Xiaoxi;CAI Siteng;LIU Gang;BIAN Dingding;LUO Zhiyong;HE Jing(Hebei Geographic Information Group Co.,Ltd.,Shijiazhuang Hebei 050499,China;College of Earth Sciences,Chengdu University of Technology,Chengdu Sichuan 610059,China)

机构地区：[1]河北省地理信息集团有限公司,河北石家庄050499 [2]成都理工大学地球科学学院,四川成都610059

出　　处：《河北省科学院学报》2024年第2期68-73,共6页Journal of The Hebei Academy of Sciences

摘　　要：相比传统的栅格数据,MVT矢量瓦片具有更高的灵活性和扩展性,能够以小文件的形式存储和传输大规模的地理信息。MVT矢量瓦片技术支持样式控制,允许用户通过自定义样式表来渲染地图。传统的矢量切片存在切片时间长,切片数据冗余占用存储空间,故免切片技术成为了未来的发展方向。针对该问题,本文利用PostGIS存储技术,设计了一套基于MVT的矢量瓦片免切片技术。利用PostGIS存储技术在处理地图服务请求时,解析其访问范围,判断在缓存库中是否有对应的瓦片数据以实时获取合适等级的矢量数据。本研究可为海量矢量数据在线地图服务提供技术支撑。Compared with traditional raster data,MVT vector tiles have higher flexibility and scalability,and can store and transmit large-scale geographic information in the form of small files.MVT vector tile technology supports style control,allowing users to render maps with custom style sheets.The traditional vector slicing has problems such as long slicing time and redundant slicing data occupying storage space,so the slicing-free technology has become the future development direction.In this paper,a set of MVT vector tile slicing-free technology based on MapBox specification is designed by using PostGIS storage.When PostGIS storage technology is used to process map service requests,its access range is analyzed to determine whether there is corresponding tile data in the cache library to obtain the appropriate level of vector data in real time.The research results can provide technical support for massive vector data online map service.

关 键 词：MVT 免切片 矢量瓦片 POSTGIS 

分 类 号：P209[天文地球—测绘科学与技术]