共查询到19条相似文献,搜索用时 109 毫秒
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本文探讨在城市建设中如何运用遥感和GIS技术对城市建设情况进行监测,基本出发点是:以RS、GIS、数据库、技术为支撑,基于高分辨率卫星遥感影像数据图像处理技术为基础,获取城市扩张用地信息,通过对比分析不同时期的城市用地的变化情况,对城市建设实施监测,为有关部门提供及时、准确、有效和权威的基于城市建成区的监测管理和决策支持,同时也可为社会和公众提供必要的信息服务。 相似文献
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本课题阐述的是:从Google Earth上截取城市区域遥感影像图,利用串口通讯技术,从手持GPs接收器中读取相关定位信息,通过分析NMEA一-0183数据格式将航点导入经过坐标匹配后的遥感影像中,实现实时导航目的。 相似文献
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遥感技术在上海苏州河水污染监测中的应用 总被引:5,自引:0,他引:5
随着航空航天技术的发展,遥感技术越来越多的应用到了城市信息的分析研究,例如在土地利用、城镇布局规划、交通、绿化以及环境监测等方面。遥感技术在环境污染监测方面的应用更加体现了它的优越性,即具有可行、便捷、实效的特点。本文利用遥感信息的空间性、现势性、时相性特征,解译了三张不同时段苏州河的彩色红外遥感影像和热红外遥感影像的信息,分析了苏州河水体污染的状况和历史原因。研究表明:在70年代苏州河水体环境良好,到80年代由于沿河居住人口的急剧增加和工业的过度发展而影响了苏州河的水质,而在90年代,由于人们环保意识的提高以及工厂码头的迁移,苏州河的治理已经取得了明显的成效。 相似文献
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金属矿床遥感影像特征与地学信息的相关性是矿床遥感地质方法研究矿化集中域矿床展布规律、开展成矿预测的基础。遥感图像中特定的、具一定地质意义的影像线-环结构,标志一定成矿地质构造单元的影像单元(赋矿影像-地质单元),与成矿有关的地质-构造-岩浆-矿化系统相对应的影像线-环构造系(赋矿影像线-环体制),构成赋矿遥感影像网络结构,具有影像特征和地质特征的双重性。影像网络结构的群集性、节律性、贯穿性、对应性;影像网络结构的综合性信息标志功能,可提供矿化集中域成矿地质环境、成矿地质条件、矿床时空展布信息,作为矿床定位预测的重要信息标志。 相似文献
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5.应用效应遥感相片影像信息,与待研究目标、环境的典型参比数据和专家知识的结合,应用目视、光电仪器和计算机技术,依据系统科学理论,进行综合分析。遥感影像在测绘、农业、林业、水利、地质、地理、海洋、气象、灾害、城市、环境、考古等领域中得到广泛的有效的应用。 相似文献
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随着遥感技术的发展,遥感数据已应用到很多领域。从遥感影像中分析出地物空间特征和属性特征是遥感影像解译的关键。遥感图像分类是将图像中每个像元根据其在不同波段的光谱亮度、空间结构特征或其他相关信息,按照一定的规则或算法划分为不同的类别。利用非监督分类法尝试对ETM+遥感影像进行分析解译,提取水体专题信息,从结果来看专题信息提取效果较好。 相似文献
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遥感技术的快速发展,遥感影像的分辨率也在不断提高,在遥感影像中,道路信息是一种非常重要的基础地理信息数据,在人们的生活、经济中都发挥着重要作用。在高分辨遥感影像越来越普遍的情况下,研究高分辨率遥感影像道路提取的方法也有很大的实际意义。 相似文献
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基于遥感图像解译的城市生态廊道研究 总被引:1,自引:0,他引:1
遥感影像解译是图像学的前沿技术,将其应用于城市环境问题研究具有交叉学科的意义和较好的效果。该文通过解译遥感影像并以北京市为例,详细研究了城市生态廊道的位置、形式和内在结构,并以卫星图片推导的植被覆盖度、地表亮温为指标分析了生态廊道的作用。由此显示了遥感技术可应用于精确的城市环境分析中,是图学应用于地学、规划学的途径。 相似文献
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信息复合是遥感技术应用的前沿.是遥感图像处理方法的新内容。信息复合的目的,在于充分利用各种遥感信息资料,实现对各种信息数据的更新补充以及动态分析研究。本大根据国家自然科学基金项目“基于信息分析的遥感图像光化学处理系统的研究”的内容.着重阐述多种遥感信息光化学复合机理,并以成功的实例论述各种遥感信息源以及遥感信息源与非途感信息源的复合方法和复合效应。研究表明,多种遥感信息光化学复合实际上就是建立不用计算机的信息数据库的方法,其在遥感地学分析中具有广泛的实用意义。 相似文献
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森林资源遥感估测的重要进展 总被引:12,自引:0,他引:12
传统的森林资源调查是一项费时、费力,需大量经费的工作。20世纪70年代末,遥感技术被引入中国。以中国林科院为主的一批林业科学工作者,积极将其应用于森林资源调查工作,特别是森林蓄积量的估测。研究了比值项的作用,确定用定量因子和定性因子联合估测森林蓄积量多元估计方程的形式,以及在中国不同气候带的应用。指出遥感调查方法比传统方法节约经费1/3~1/2。近年来,用近代统计学和非参数方法进行了新的探索和深入研究,解决了一些在林业资源调查中应用遥感技术的重要问题,为建立以遥感技术为主要技术手段的新的森林资源估测体系提供有力支持。 相似文献
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20世纪80年代以来,遥感信息技术在环境保护领域的应用得到了长足发展。遥感信息技术导致环境保护领域的研究范围、内容和方法的重要变化,标志着环境信息获取和处理方法的一场革命。环境污染遥感监测技术具有监测范围广、速度快、成本低,且便于进行长期的动态监测等优点,是实现宏观、快速、连续、动态监测环境污染的有效手段。本文先分析了遥感监测技术的概念、基本原理、系统构成和特点等,然后介绍了这种技术在各类环境污染监测中的应用情况,最后分析了我国环境污染遥感监测技术的发展趋势。 相似文献
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Qi He Shui Yu Huifang Xu Jia Liu Dongmei Huang Guohua Liu Fangqin Xu Yanling Du 《计算机、材料和连续体(英文)》2019,58(2):349-361
The recent advances in remote sensing and computer techniques give birth to the explosive growth of remote sensing images. The emergence of cloud storage has brought new opportunities for storage and management of massive remote sensing images with its large storage space, cost savings. However, the openness of cloud brings challenges for image data security. In this paper, we propose a weighted image sharing scheme to ensure the security of remote sensing in cloud environment, which takes the weights of participants (i.e., cloud service providers) into consideration. An extended Mignotte sequence is constructed according to the weights of participants, and we can generate image shadow shares based on the hash value which can be obtained from gray value of remote sensing images. Then we store the shadows in every cloud service provider, respectively. At last, we restore the remote sensing image based on the Chinese Remainder Theorem. Experimental results show the proposed scheme can effectively realize the secure storage of remote sensing images in the cloud. The experiment also shows that no matter weight values, each service providers only needs to save one share, which simplifies the management and usage, it also reduces the transmission of secret information, strengthens the security and practicality of this scheme. 相似文献
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Starting with the initial aim of reconnaissance technical developments in remote sensing have progressed sufficiently for
the large-scale realisation of practical benefits. During the eighties a number of countries will have remote sensing satellite
systems in operation. There are however a few technical, legal, political and economic issues that still remain unresolved.
The resolution of these issues would facilitate practical applications especially in developing countries. Apart from the
purely technical and economic issues such as the ability to compare data from two different satellites, the cost of the data
etc one of the major hurdles in the application of this technology is the establishment of an international regime governing
the activities of states in remote sensing. This is particularly important in view of the link between surveillance and remote
sensing. Even though discussions have been going on for quite some time at the United Nations, the prospects of reaching agreement
remain bleak.
The main problems precluding agreement are national security, commercial and sovereignty concerns of the developed and developing
countries. The key issues relate to the right of countries to conduct remote sensing over other countries, the right of countries
collecting remote sensing data (over other countries) to distribute this data freely and the modalities of how the “sensitivity”
aspects of remote sensing for surveillance and economic espionage can be reconciled with a legal regime that emphasises international
cooperation. A critical analysis of existing international space law seems to indicate that there are two kinds of remote
sensing—passive and active. In passive remote sensing the satellite sensor detects the sun-reflected or self-emitted radiation
from objects on the ground. In active remote sensing a pulse of electromagnetic radiation is transmited from the satellite
and its reflectance or scattering by objects on the earth’s surface is measured. A strict reading of existing legal principles
on space seem to imply that passive sensing is legal while active sensing could be interpreted as violating the sovereignty
of the sensed state. Agreement on remote sensing can be reached if a resolution or a range of resolutions can be defined to
discriminate between “sensitive” and “non-sensitive” data.
The only international agreement in this area between the USSR and a group of nine socialist countries uses a resolution limit
of 50m. Available information on the subject seems to indicate that the range is from 25–50 m.
One other aspect dealt with relates to the use of satellite data for verification of arms control measures, for crisis monitoring
and the prospects of setting up an International Satellite Monitoring Agency (ISMA). It appears that the huge expense that this would entail would be justified only if theISMA can monitor the superpowers and the arms race between them. 相似文献