共查询到20条相似文献，搜索用时 62 毫秒
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谢岩 《测绘与空间地理信息》2012,(12):100-101
根据利用QuickBird高分辨率卫星影像进行1∶10 000比例尺地形图更新的生产情况,主要研究利用QuickBird卫星影像,更新1∶10 000比例尺地形图的方法、技术和步骤。 相似文献
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利用0.5 m GeoEye卫星遥感影像立体像对和外业施测一定数量的控制点和检查点,进行1∶10000比例尺地形图立体测图试验研究,探索了所能达到的精度情况. 相似文献
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卢清国 《测绘与空间地理信息》2010,33(5)
主要针对IKONOS卫星影像因其覆盖面积大、更新周期短和多光谱的特征,利用IKONOS卫星立体影像在数字摄影测量工作站上试验1∶10 000,1∶5 000,1∶2 000等比例尺地形图生产和更新,修测中小比例尺地形图,对其成图进行精度分析,综合评定其对于工程用图成图的可适用性,以及对于基本数据获取的可行性和所带来的工作效率和经济效益。 相似文献
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于影 《测绘与空间地理信息》2018,(3):81-82,86
以辽宁省1∶10 000比例尺地形图更新为例,以国产高分辨率卫星遥感影像作为数据源,探讨了实现1∶10 000比例尺地形更新的方法。经过实践证明,利用高分辨率卫星遥感影像作为数据源进行1∶10 000比例尺地形图更新,是目前最快速、最经济的一种地形图更新方法。 相似文献
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基于IKONOS卫星影像进行地形图修测的方法研究 总被引：3，自引：0，他引：3
本文以项目试验为基础,将经过融合、校正等处理的IKONOS卫星影像数据叠加到已有地图数据上进行地形图的修测,研究利用现势性强的高分辨率卫星影像进行规模化修测1∶10000、1∶5000甚至更大比例尺地形图的技术路线。 相似文献
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利用国产自主研发的立体测图卫星资源三号卫星遥感影像,采用无地面控制区域网平差方法,试生产极地地区1∶50 000 3D(DLG,DEM,DOM)地理信息产品.通过试生产提出极地1∶50 000比例尺数据成图技术流程图,并对其数据处理过程中的关键技术进行研究和分析,提出相关的技术要求. 相似文献
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采用Landsat TM数据分析了阿克苏河—塔里木河断面水质污染状况,通过波段的DN值和常规监测数据建立能反映水质状况的
污染物监测模型。结果发现,将2000年常规监测数据代入模型后,与遥感数据的结果基本吻合| 重建阿克苏河—塔里木河的连续水体
污染变化曲线,得出污染物浓度随着远离上游而增加。 相似文献
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Monitoring drought dynamics in the Aravalli region (India) using different indices based on ground and remote sensing data 总被引：5，自引：0，他引：5
C. Bhuiyan R.P. Singh F.N. Kogan 《International Journal of Applied Earth Observation and Geoinformation》2006,8(4):289-302
The hard-rock hilly Aravalli terrain of Rajasthan province of India suffers with frequent drought due to poor and delayed monsoon, abnormally high summer-temperature and insufficient water resources. In the present study, detailed analysis of meteorological and hydrological data of the Aravalli region has been carried out for the years 1984–2003. Standardised Precipitation Index (SPI) has been used to quantify the precipitation deficit. Standardised Water-Level Index (SWI) has been developed to assess ground-water recharge-deficit. Vegetative drought indices like Vegetation Condition Index (VCI) and Temperature Condition Index (TCI) and Vegetation Health Index (VHI) have been computed using NDVI values obtained from Global Vegetation Index (GVI) and thermal channel data of NOAA AVHRR satellite. Detailed analyses of spatial and temporal drought dynamics during monsoon and non-monsoon seasons have been carried out through drought index maps generated in Geographic Information Systems (GIS) environment. Analysis and interpretation of these maps reveal that negative SPI anomalies not always correspond to drought. In the Aravalli region, aquifer-stress shifts its position time to time, and in certain pockets it is more frequent. In comparison to hydrological stress, vegetative stress in the Aravalli region is found to be slower to begin but quicker to withdraw. 相似文献
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Piyoosh Rautela Ramesh Chandra Lakhera 《International Journal of Applied Earth Observation and Geoinformation》2000,2(3-4)
The area around Sataun in the Sirmur district of Himachal Pradesh, India (falling between the rivers Giri and Tons; both tributaries of the Yamuna River) was studied for landslide vulnerability on behalf of the inhabitants. The study was made using extensive remote sensing data (satellite and airborne). It is well supported by field evidence, demographic and infrastructural details and aided by Geographic Information System (GIS) based techniques. Field observations testify that slope, aspect, geology, tectonic planes, drainage, and land use all influence landslides in the region. These parameters were taken into consideration using the statistical approach of landslide hazard zonation. Using the census data of 1991, vulnerability of the populace to the landslide hazard was accessed. As most of the infrastructure in the region is concentrated around population centres, population data alone was used for vulnerability studies. 相似文献
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ZHAN F. Benjamin 《地球空间信息科学学报》2011,(1)
Although it is well known that coseismic gravity changes take place during an earthquake, previous research has not yielded convincing evidence demonstrating that significant gravity changes occur before large earthquakes. Furthermore, even if we suspect that gravity changes occur before large earthquakes, we have yet to demonstrate how to consistently observe these changes for useful earthquake forecast that would bring benefits to society. We analyzed ground gravity survey data obtained in 1998, 2000, 200... 相似文献
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GNSS系统及其技术的发展研究 总被引：3，自引：1，他引：2
阐述了国际上卫星导航系统的总体发展,对美、俄、欧、中的四大全球系统,以及相关的区域系统和增强系统进行了简单的介绍,研究分析了GNSS系统及其技术的发展趋势,同时分析了我国Compass全球系统面临的机遇和挑战,并提出了我国未来工作的建议. 相似文献
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“4D”技术及其应用 总被引：13，自引：0，他引：13
介绍“４Ｄ”（即数字地面模型、数字正射影像、数字栅格地图和数字线划地图）系列产品的生产流程、关键技术、及其在耕地保护、防灾减灾救灾和城市规划等方面的应用方法。 相似文献
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《International Journal of Digital Earth》2013,6(1):66-87
Abstract Virtual Australia is not a well-defined or agreed concept. This discussion paper conceptualises Virtual Australia as a ‘virtual [digital] model containing and representing all non-trivial objects and their contextual environment – from blue sky to bedrock – in real world Australia’. It describes a scenario for Virtual Australia, one or two decades from now, in which the locations and conditions of non-trivial objects and their environment are updated automatically through a combination of remote sensing and wireless communication technologies in support of a ‘Supranet’. It then examines the concept of the ‘Supranet’ – a pervasive information network based largely on wireless technology linking the physical world to a virtual model in real time – and develops and discusses three principal characteristics of the Supranet: the ability to have or collect specific information (know); the ability to process information (think); and the ability to communicate that information. If, in the near future, any or all non-trivial devices are to some extent able to know, think and communicate, the potential for object autonomy will be realised. 相似文献
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自动车辆定位导航系统中传感器的误差分析 总被引：1，自引：0，他引：1
对国界定位导航系统中几种常见的辅助传感器所产生的误差进行了分析，导出了不同传感器的误差模型。这些误差模型是估计车辆位置的扩展卡尔曼滤波器的基础，同时也为选择适当的传感器提供了理论根据。 相似文献