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121.
The Google Earth terrain model could prove beneficial for extraction of positional data in the future. At present, only an aging independent benchmark study (Potere, D., 2008. Horizontal position accuracy of Google Earth's high-resolution imagery archive. Sensors, 8, 7973–7981) provides constraints on positional accuracy for Google Earth imagery. In this investigation, we compared virtually traced positions against high-precision (<1 m) field measurements along three stratigraphic unconformity sub-sections in the Big Bend region to determine current positional accuracy for the Google Earth terrain model. A horizontal position accuracy of 2.64 m RMSEr was determined for the Google Earth terrain model with mean offset distance being 6.95 m. A vertical position accuracy of 1.63 m RMSEz with mean offset distance of 2.66 m was also calculated for the terrain model. Results suggest data extracted from the Google Earth terrain model could plausibly be used in future studies. However, we urge caution in using Google Earth data due to limited information disclosures by developers. 相似文献
122.
Google Earth遥感影像图具有直观、免费、时效性强等特点,已逐渐应用于工程领域。分析了几何精校正的原理和方法;探讨了Web Mercator投影以及ArcGIS、ENVI用于GE遥感影像精校正的具体实施步骤和精度,以期为GE用于工程实践提供思路与方法。 相似文献
123.
作为数字城市建设的重要表现形式和技术基础,数字3维已成为当今研究的热点,而3维建模高程是构建数字3维的必要组成部分。介绍一种简单新型的基于Google Earth绘制大比例尺地形图的制作方法,与1∶250 000DEM数据、0.61 m分辨率的Quick Bird影像和0.48 m分辨率的World View-Ⅱ影像进行对比分析,并对该方法制作的大比例尺地形图的质量进行分析与讨论,该方法在保证一定制图精度的条件下,不仅能够快速掌握,而且方便快捷,成本较低,具有一定的创新型和推广价值。 相似文献
124.
利用Google earth调查气象台站环境 总被引：2，自引：0，他引：2
利用Google earth地图软件,可查看台站周围的环境,测定干扰源距地面观测场围栏的距离,并分析干扰源与观测状况.该软件可以帮助了解台站周围土地使用情况,登记周围障碍物,绘制台站和四周情况平面示意图. 相似文献
125.
为提高气象报文的编发质量和时效,研制了新乡市气象报文编发监控报警系统.该系统包括气象报文数据库设计、智能语音报警、编发报文、查询报文4个功能模块.通过编发报文模块,预报员能迅速编写气象报文,并自动完成报文的上传和下发;系统具有一定纠错能力,还可对发出的气象报文自动登记备案. 相似文献
126.
利用Google Map在Android移动设备上的SDK进行LBS应用系统的设计,通过对网络模块、地图模块等核心模块的构建和外接服务的嵌入,实现对当前移动互联网中移动LBS热点应用的设计原型的探讨。 相似文献
127.
罗火箭 《测绘与空间地理信息》2012,35(11):124-126,129
随着社会生产力的飞速发展,各行各业对正射影像(DOM)的需求越来越大,但传统的正射影像制作成本较高,工期也相对较长。而Google Earth上的影像几乎覆盖了全球所有大中城市及周边地区,且局部地区的有效分辨率可达0.5 m以上,但其定位偏差较大。本文着重研究了如何从Google Earth上获取精确定位的DOM。 相似文献
128.
Google Earth was released a few months prior to Hurricane Katrina and became an important tool in distributing information about the damage occurring in New Orleans, albeit not to all parts of society. While Google Earth did not create the economic and racial divides present in society, its use in the post-Katrina context reflect this gulf and have arguably reinforced and recreated it online. This paper has three main objectives. The first is to provide a clear empirical case study of how race remains relevant to the way people use (or do not use) the internet and internet based services. The second is highlighting the power of new online and interactive mapping technologies and demonstrating how these technologies are differentially adopted. The third and final objective is illustrating how any divide in accessing digital technology is not simply a one time event but a constantly moving target as new devices, software and cultural practices emerge. Thus, in addition to highlighting the racial inequalities in US society in general, Hurricane Katrina provides an important window on the way in which race remains a key factor in the access and use of emerging digital technologies. 相似文献
129.
This paper argues, following Friedrich Nietzsche, that recent evaluations of Google Earth uncritically privilege the product’s Apollonian determinations at the expense of its Dionysian uncertainties. Specifically, when we understand Google Earth as a virtual globe composed of surveyed panoramas, sober rationalization, dystopic control, and transparent order – or, even, as a tool for participation and empowerment – we undersell its capacities as an alluring digital peep-box, an uncertain orb spangled with vertiginous paranoia, frenzied navigation, jubilatory dissolution, and intoxicating giddiness. We argue that the former interpretations not only risk foreclosing our theorizations about how Google Earth is actually used in various ways and different contexts, they also reproduce a one-dimensional and conservative reading of technology that can be traced back (at least) to the writings of Theodor Adorno. By drawing on the work of Walter Benjamin (Adorno’s critic and pen pal for more than a decade) we aim to ‘go beyond Apollo and Adorno’ by illustrating the extent to which Apollonian order and Dionysian love makes Google Earth go round. To do this, we examine Google Earth as a “digital peep-box” with an online collective that revels in its “Spot the Black Helicopter” competitions; illuminated profanities; alien and giant insect invaders; naked sunbathers; and crashed transport planes in Darfur. 相似文献
130.
The 12 May 2008 M7.9 Wenchuan earthquake in the People’s Republic of China represented a unique opportunity for the international
community to use commonly available GIS (Geographic Information System) tools, like Google Earth (GE), to rapidly evaluate
and assess landslide hazards triggered by the destructive earthquake and its aftershocks. In order to map earthquake-triggered
landslides, we provide details on the applicability and limitations of publicly available 3-day-post- and pre-earthquake imagery
provided by GE from the FORMOSAT-2 (formerly ROCSAT-2; Republic of China Satellite 2). We interpreted landslides on the 8-m-resolution
FORMOSAT-2 image by GE; as a result, 257 large landslides were mapped with the highest concentration along the Beichuan fault.
An estimated density of 0.3 landslides/km2 represents a minimum bound on density given the resolution of available imagery; higher resolution data would have identified
more landslides. This is a preliminary study, and further study is needed to understand the landslide characteristics in detail.
Although it is best to obtain landslide locations and measurements from satellite imagery having high resolution, it was found
that GE is an effective and rapid reconnaissance tool. 相似文献