共查询到20条相似文献，搜索用时 414 毫秒
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基于国产卫星数据的矿山遥感监测一体化解决方案——以西藏自治区为例 总被引：1，自引：0，他引：1
随着高分辨率国产遥感卫星数据的推广应用,矿山遥感监测必将成为该数据的重要应用领域之一。结合西藏自治区矿山遥感监测工作的特点,以资源一号02C(ZY-1 02C)及高分一号(GF-1)卫星影像为数据源,在ArcGIS环境下,提出并实现了从国产卫星遥感数据管理、增强与校正、信息提取、统计分析以及成果图制作等一体化解决方案。该研究成果有助于推进国产卫星遥感数据在矿山遥感监测领域的应用广度和深度,为大规模开展多期次动态矿山遥感监测工作提供技术支持和应用范例。 相似文献
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《国土资源遥感》2016,(4)
为充分发挥我国国产卫星遥感数据在水文地质调查中的应用潜力,利用资源一号02C(ZY-1 02C)卫星数据对西藏札达地区进行了水文地质调查。经调查发现各类泉点及泉群29处、各种大小不一的地下水溢出带14处、控水断裂3条、绿洲13处;划分出松散岩类孔隙水、碎屑岩类孔隙裂隙水、层状岩类裂隙水、裂隙岩溶水、块状岩类裂隙水和冻结层水等6种地下水类型;并详细划分了第四系成因类型,进一步解译了松散岩类孔隙水的相对富水区、含水性一般区和相对贫水区。调查结果表明,利用遥感技术进行区域水文地质调查的前期工作,可大大减少野外工作量,为后续水文地质详查工作提供基础资料;也从一个侧面说明了国产ZY-1 02C星数据在水文地质调查中的应用价值。 相似文献
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高分四号卫星在干旱遥感监测中的应用 总被引：3，自引：3，他引：0
高分四号(GF-4)是国家高分辨率对地观测系统重大专项天基系统中的一颗地球同步卫星,为探索GF-4号卫星在大面积干旱监测中的应用,本文对该卫星在快速监测大面积干旱方面的应用能力进行了初步探讨。以2016年内蒙古自治区巴林左旗和巴林右旗地区严重旱灾为例,利用NDVI差值对该区域的干旱情况进行了监测,并与MODIS NDVI产品进行对比分析,得到了研究区内2016年干旱分布情况,结果表明其总体趋势与MODIS NDVI产品一致,且细节信息更加丰富。本文主要是GF-4卫星数据结合GF-1卫星数据对内蒙部分干旱区域进行监测和分析,体现了国产高分辨率卫星数据,尤其是GF-4卫星数据,对提高中国突发灾害的应对能力具有重要意义。 相似文献
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多源数据联合平差不仅可以保证异源数据之间的接边精度,还可提高整体区域网的稳定程度,精度分析是多源联合平差的重要保障。随着国产卫星传感器类型的日益丰富,多源联合平差逐步应用于国产卫星数据,然而基于此方面的精度分析和其对单源数据平差产生影响等方面的研究相对缺乏。为此,以国产高空间分辨率卫星数据为研究对象,构建基于有理多项式(rational polynomial coefficient,RPC)的多源数据联合区域网平差模型,并对重庆市西部地区的高分一号(GF-1)、高分二号(GF-2)和资源三号(ZY-3)卫星数据进行多源联合区域网平差试验,通过设计不同控制点布设策略、统计平差结果的精度,综合分析不同方案下区域网平差对系统误差的改正效果及对单源数据产生的影响。试验结果表明,基于国产高分卫星的多源联合区域网平差方法可行,并对单源平差精度产生了积极作用。 相似文献
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近年来国产遥感卫星数据增多,但在山地冰川运动速度监测研究中,国产卫星遥感数据的使用却很少。基于此现状,本研究利用"高分一号"卫星数据(GF-1)对藏东南雅弄冰川运动速度进行了提取。通过与同分辨率、同时段的Landsat 8数据进行对比,以及利用非冰川稳定区域的残余位移和冰川主冰流线剖面运动速度两方面,评估了GF-1数据提取的冰川运动速度的精度。结果表明:GF-1数据在非冰川稳定区域的平均偏移量为7.48 m·a~(-1),虽较Landsat 8数据的高(平均偏移量4.58 m·a~(-1)),但小于冰川平均运动速度的5%;GF-1数据与Landsat 8数据在2015年—2016年时段内的冰川主冰流线运动速度变化趋势一致,两者的偏差均方根为7.41 m,小于冰川平均运动速度的5%。研究结果证明了国产高分一号卫星遥感数据在青藏高原山地冰川运动速度监测应用中的可行性。 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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Toward seamless indoor-outdoor applications: Developing stakeholder-oriented location-based services
Kohei OGAWA Edward VERBREE Sisi ZLATANOVA Naohiko KOHTAKE Yoshiaki OHKAMI 《地球空间信息科学学报》2011,14(2):109-118
Location-Based Services (LBS),an emerging new business based on smartphone and mobile networks,are becoming more and more popular.Most of these LBSs,however,only offer non-seamless indoor/outdoor applications and simple applications without giving stakeholders the chance to play an active role.Our specific aim is to solve these issues.This paper presents concepts to solve these issues by expanding the Open Location Services Interface Standard (OpenLS) to allow seamless indoor/outdoor positioning and to extend the content of the services to include information recommended by stakeholders. 相似文献
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地理数据库的关系模型及其实现 总被引：1，自引：0，他引：1
本文从以图论观点分析地理实体入手,系统阐述了地理数据库关系模型的设计法和过程。作者于1984年4～9月间在微型机上设计建立了关系型地理数据库的实方验系统(RGDB)。该系统采用了本文提出的关系模型,采用了可动态扩库的子库组合结构,这种结构具有灵活性和提高空间利用率的优点。RGDB含有多种功能的数据操作命令,除了具有一般检索功能外,还能进行“开窗”选取和十分“自由”的映象选取。本文对RGDB系统的主要性能和实现途径作了扼要介绍。 相似文献