共查询到18条相似文献，搜索用时 125 毫秒
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探讨了利用Google Earth辅助进行像片控制测量控制点布设的优点,介绍了利用Google Earth进行像控点布设的方法和作业流程。 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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Google Earth作为公共地图服务平台,为测绘、勘探等工作提供了数据支持。本文探讨了开发应用软件,将GIS数据批量转换为Google Earth数据的关键技术,实现了数据管理、数据转换等功能。 相似文献
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以ArcGIS软件为平台,探讨了基础地理信息数据与Google Earth影像相结合的技术,并以某地区测量控制点和社区边界为实例进行了演示。 相似文献
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《测绘通报》2019,(Z1)
提出了利用全球IGS基准站精确坐标分析其在Google Earth地图上识别精度的方法。Google Earth地图支持WGS-84大地坐标,从IGS网站上获取IGS基准站WGS-84精确大地坐标,采用KML标记语言开发程序,将IGS基准站精确标注在Google Earth地图上。通过Google Earth标尺工具得到谷歌地图可识别的IGS基准站与标注的IGS基准站精确坐标点的地图距离、地面距离及方位角,比较识别位置与标注精确位置的精度情况。选取了全球分布的1054个IGS基准站的坐标,将IGS基准站精确位置与Google Earth地图可识别IGS基准站位置进行比对,统计分析其识别率和精度。结果表明,IGS基准站在Google Earth识别的平均精度为4. 38 m(其中精度小于2 m的占20. 61%,精度24 m的占18. 76%,精度4～6 m的占41. 08%,精度6～8 m的占6. 34%,精度8～10 m的占3. 70%,精度10～12 m的占2. 38%,精度12～14 m的占1. 72%,精度14～16 m的占1. 45%。)。中国区域的精度为1. 5～2 m,美国、欧洲、日本等国家城市内的精度可以达到1 m,在这些地区和国家可运用Google Earth为高精度的GNSS测量工作服务,如GNSS踏勘选点及制作GNSS点之记等。 相似文献
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分析了Google Earth软件的强大功能,并详细介绍了Google Earth软件在水利水电测绘中的各种实际应用,包括水利工程断面测绘、地形图测绘、控制网优化设计、非涉密控制点成果资料管理及其他应用等,供广大水利水电测绘工作者参考。 相似文献
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通过对KML文件结构的分析,利用UltraEdit软件制作KML文件,笔者总结出一种在Google Earth中批量标记点位的方法. 相似文献
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以GoogleEarth为数据平台，利用VC^＋＋6．0和Google Earth API，设计并实现了面向用户的楼盘信息查询系统；同时，利用ArcGIS Engine进行二次开发，进行缓冲区分析；最后以长沙市小区山语林居为例，验证了系统的可行性与实用性。 相似文献
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利用遥感技术进行工程预选址,能够克服困难地区交通不便、环境恶劣等困难,但使用商业遥感影像成本较高,借助Google Earth提供的坐标信息,以及开放网络资源提供的高分辨率遥感影像进行工程预选址能够达到事半功倍的效果。文中利用Google Earth进行二次开发,获取某区域的三维坐标点集,建立数字高程模型。在此基础上,叠加影像制作该区域三维场景,并结合该区域遥感地质解译等相关资料,在三维场景中进行综合分析,实现工程预选址。实验表明,在三维场景中进行选址分析更直观、真实,选址工作更具有针对性,可缩小感兴区范围,节省大量时间。 相似文献
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Exploring differences of visual attention in pedestrian navigation when using 2D maps and 3D geo-browsers 总被引：1，自引：0，他引：1
ABSTRACTDespite the now-ubiquitous two-dimensional (2D) electronic maps, three-dimensional (3D) globe viewers, or 3D geo-browsers such as Google Earth and NASA World Wind have gained much attention. However, the effect of such interactive 3D geo-browsers on spatial knowledge acquisition and decision-making is not well known. This study aims to explore the potential benefits of using interactive 3D geo-browsers in three processes of pedestrian navigation (self-localization, spatial knowledge acquisition, and decision-making) in digital environments. We employed eye tracking to show differences of visual attention in pedestrian navigation between a 2D map (Google Map) and a 3D geo-browser (Google Earth). The results indicated that benefits and drawbacks of 3D representations are task dependent. Participants using the 3D geo-browser had an extensively visual search resulting in significantly longer response time than the 2D participants for spatial knowledge acquisition, whereas 3D users performed a more efficient visual search and resulted in a better navigation performance at complex decision points. We speculate that the inefficient knowledge acquisition when using the 3D geo-browser was most probably due to information overload and obstructed views. Landmarks in photorealistic 3D models assisted recall of spatial knowledge from mental maps, which contributed to efficient decision-making at a complex turning point. These empirical results can be helpful to improve the usability of pedestrian navigation systems. 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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讨论了一种快速开发3维WebGIS的方法,该方法使用Google公司推出的SketchUp和Google Earth JavaS-cript API实现,随后通过一个3维校园实例予以说明。实例证明,基于Google Earth JavaScript API,用户可以快速开发出易于部署、成本低廉、通用性好的个性化3维We... 相似文献
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J. C. Bhattacharji 《Journal of Geodesy》1973,47(1):65-72
The method of converting geodetic coordinates from a national geodetic reference system into the standard Earth on having
known the geodetic coordinates of at least one station in common with the considered systems, is described in detail; the
orientation of the Standard Earth at the initial station of the national geodetic reference system, is also determined side
by side. For illustration, use has been made of the known coordinates of the Baker-Nunn station at Naini Tal, in India, being
in common with the Indian Everest Spheroid and the Smithsonian Institution Standard Earth C7 system (Veis, 1967). The method advocated is likely to be more precise than the existing ones as it does not assume the parallelism
of axes of reference between the Standard Earth and the national geodetic reference systems which may not necessarily hold
good in actual practice. 相似文献