| 谷歌地图关键技术剖析与应用 |
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| 引用本文： | 赵永辉,段云龙,郭新望,张明. 谷歌地图关键技术剖析与应用[J]. 海洋测绘, 2019, 0(3): 67-70 |
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| 作者姓名： | 赵永辉 段云龙 郭新望 张明 |
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| 作者单位： | 河南省环境监控中心;中国电子科技集团公司第二十七研究所 |
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| 基金项目： | 河南省空天地一体化环境信息监控系统(一期)(豫财单一采购-2017-205) |
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| 摘 要： | 以研究和分析谷歌地图的设计与运行机制为目标,深入分析了谷歌地图卫星影像的投影模型、瓦片数据组织模型、数据请求与响应流程、瓦片数据URL地址解析等关键技术,并设计了一套可以多线程的方式下载瓦片影像数据、采用OpenGL渲染瓦片影像、并按照MBTiles规范使用SQLite数据库存储瓦片影像的卫星影像下载器。实践效果表明,下载器可实现对谷歌地图卫星影像数据的可靠下载、渲染和存储,验证了关键技术的正确性和有效性。
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| 关 键 词： | 谷歌地图 卫星影像 瓦片影像 Web墨卡托投影 影像下载器 |
Key Technology Analysis and Application of Google Maps |
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| ZHAO Yonghui,DUAN Yunlong,GUO Xinwang,ZHANG Ming. Key Technology Analysis and Application of Google Maps[J]. Hydrographic Surveying and Charting, 2019, 0(3): 67-70 |
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| Authors: | ZHAO Yonghui DUAN Yunlong GUO Xinwang ZHANG Ming |
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| Affiliation: | Henan Environmental Monitoring Center,Zhengzhou 450004 ,China;The 27 th Research Institute of China Electronics Technology Group Corporation,Zhengzhou 450047 ,China |
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| Abstract: | Aimed at studying and analyzing the design and running principles of Google Maps,the key technologies such as the projection model,the organization model of tile data,the technological process of tile data request-response and the URL resolving of tile data are analyzed deeply,and a downloader software is designed and implemented which can download image tile data by multi-thread,adopt OpenGL to render the image tile data,and save image tile files into SQLite according to MBTiles specifications.Practice proves that the downloader can download,render and save Google Maps satellite image data reliably,and correctness and validity of the key technologies are verified. |
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| Keywords: | Google maps satellite image tile image web mercator projection image downloader |
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