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广东省三维地形场景仿真研究 总被引:1,自引:0,他引:1
《测绘地理信息》2016,(3)
三维地形场景的仿真是虚拟现实技术的关键部分之一。采用SRTM为DEM数据源,以Google Earth影像为仿真纹理,经影像数据截拼、投影转换、SRTM数据无缝拼接,以及Google Earth影像在DEM上的叠加,实现了广东省三维地形场景仿真。三维地形场景仿真更具有立体感和层次感,有利于快速直观地把握各地形地貌要素,在很大程度上缩短读图时间,有效地提高工作效率。 相似文献
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针对国产卫星境外定位的实际需要,提出利用Google Earth数据量测控制点辅助高分辨率遥感影像区域网平差的方法。首先统一坐标系,将所量测的控制点高程坐标转换为大地高;然后将其视为精度较低的控制点参与平差。试验分为无地面控制点和布设稀少地面控制点两种情况,对于每种情况分别设计不同的试验方案分析Google Earth数据对于定位精度的影响。结果表明利用Google Earth数据辅助区域网平差可以明显提高定位精度,可为缺少地面控制点的境外地区的光学线阵遥感影像几何定位提供新的思路。 相似文献
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应用Google Earth中提取的DEM,SRTM,以及ASTER-GDEM 3种公开免费使用的DEM数据,将这3种数据进行格式转换、坐标转换等预处理后,在MapGIS中对某一给定范围及处理高程的区域进行了挖填方估算,对原始DEM和设计DEM均实现了可视化显示。本文为各种工程项目设计阶段的工程量快速概算提供了指导意义。 相似文献
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基于ArcEngine与OGR库的Shapefiles文件到KML格式转换方法研究 总被引:1,自引:0,他引:1
Google Earth的问世,给GIS行业注入了新的活力,但对GIS的核心和重要功能--空间分析的支持几乎为零.本文首先使用ArcGIS Engine实现了Shapefiles文件的缓冲区分析功能,然后通过ArcGIS Engine和OGR库把缓冲区分析结果的Shapefiles文件转换为KML格式,从而将缓冲区分析的结果在Google Earth中显示出来,间接地增强了Google Earth缓冲区分析的功能. 相似文献
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通过对手持GPS采集的数据及Google Earth支持的文件分析,得出两种数据之间的转换方法,给出一种Google Earth在外业生产中离线应用方法。 相似文献
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Marcos Arza-García Mariluz Gil-Docampo Juan Ortiz-Sanz Santiago Martínez-Rodríguez 《International Journal of Digital Earth》2019,12(5):583-593
The integration of local measurements and monitoring via global-scale Earth observations has become a new challenge in digital Earth science. The increasing accessibility and ease of use of virtual globes (VGs) represent primary advantages of this integration, and the digital Earth scientific community has adopted this technology as one of the main methods for disseminating the results of scientific studies. In this study, the best VG software for the dissemination and analysis of high-resolution UAV (Unmanned Aerial Vehicle) data is identified for global and continuous geographic scope support. The VGs Google Earth and Sputnik Geographic Information System (GIS) are selected and compared for this purpose. Google Earth is a free platform and one of the most widely used VGs, and one of its best features its ability to provide users with quality visual results. The proprietary software Sputnik GIS more closely approximates the analytical capacity of a traditional GIS and provides outstanding advantages, such as DEM overlapping and visualization for its dissemination. 相似文献
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The ability to visualize location and time information on satellite‐generated maps using geographic information systems (GIS) such as Google Earth has enabled researchers with limited mapping expertise to use GIS for a wide range of applications. GIS holds special benefits for research in historical geography involving visualization of events and time‐based changes in geographical information. This article describes a Microsoft Excel VBA application which automatically converts information contained in a Microsoft Excel workbook into a.kml (Keyhole Markup Language) file suitable for display by mapping systems such as Google Earth. The application requires no knowledge of KML or Excel VBA. An example illustrates how the application can be used to trace the Mongol invasion of Eastern Europe. 相似文献
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WebGIS及其体系结构研究 总被引:5,自引:1,他引:4
和互联网一样,WebGIS在公众服务领域起到越来越重要的作用,伴随着互联网的发展延伸至人们生活的方方面面。Google Earth是公众服务领域内WebGIS的代表性产品,它的出现对传统GIS、甚至测绘都产生重大冲击。以Google Earth为例,阐述WebGIS的发展、特点,对其体系结构进行分析,并就WebGIS的发展趋势进行探讨。 相似文献
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通过分析Google Earth在电力线路勘测及输电线路基建管理中的应用,提出了一种简单可行的构建三维输电线路GIS系统的方法。 相似文献
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Integrating data on health outcomes with methods of disease mapping and spatially explicit models of environmental contaminants are important aspects of environmental health surveillance. In this article, we describe a modular, web‐based spatial analysis system that uses GIS, spatial analysis methods and software services delivered over computer networks to achieve this end. The Environmental Health Surveillance System (EHSS) is a prototype system that is designed to serve three purposes: a secure environment for producing maps of disease outcomes from individual‐level data while preserving privacy; an automated process of linking environmental data, environmental models, and GIS tasks like geocoding for the purposes of estimating individual exposures to environmental contaminants; and mechanisms to visualize the spatial patterns of disease outcomes via Web‐based mapping interfaces and interactive tools like Google Earth. 相似文献
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基于ArcEngine的ArcGIS矢量数据到KML文件转换方法研究 总被引:2,自引:0,他引:2
ESRI是GIS领域的拓荒者和领导者,Google Earth则提供了全球范围的影像数据库,将二者结合起来进行商业开发具有很强的现实意义。本文介绍了基于ArcEngine的ArcGIS矢量数据到KML转换的主要思想,提出了转换方法,并进行了程序实现。 相似文献