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Abstract Remote sensing and geographic information system (GIS) scientists and educators in general are utilizing global web sources for information of the latest developments in the use of satellite and GIS approaches, as well as to understand more fully environmental and natural resources processes in various geographic settings. West Virginia University (WVU) has embarked on a pioneering approach (as only the second university worldwide) to archive graduate theses and dissertations in electronic format with worldwide web access. This study illustrates the type of remote sensing and GIS research available through WVU's worldwide web ETD archive, and its potential uses by educators at a variety of levels of the education system for understanding remote sensing and GIS methodologies, as well as environmental and natural resource processes. Keywords: Geographic Information Systems (GIS), remote sensing, West Virginia University, Electronic Thesis and Dissertation (ETD). 相似文献
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介绍了航空激光扫描(Airborne laser scanning)或者Lidar遥感信息获取系统的基本原理、系统的组成、数据获取的方法及其步骤;对近数十年来应用激光扫描遥感信息获取地形表面模型方面取得的主要成果、应用现状做了简要回顾和评述;结合GIS和影像融合方法对Lidar遥感技术未来发展趋势进行了展望。 相似文献
3.
为更好地发挥遥感技术在城市规划地图制作中的应用,高分辨率遥感影像成为城市地图制作中最重要的数据源。面对地物信息复杂、建筑物众多的城市地区,如何快速提取高分辨率遥感影像地图制作过程中相邻两景影像之间的镶嵌线具有重要意义。本文以国产卫星中分辨率最高、幅宽最小的GF-2影像为数据源,融合建筑物轮廓数据,研究了基于最短路径的A*搜索算法,实现了遥感影像地图制作的镶嵌线自动提取技术。结果表明,该方法能够自动生成避让建筑物的镶嵌线,速度快、镶嵌质量高,可广泛应用于城市地区高分辨率遥感影像地图制作。 相似文献
4.
RS与GIS技术在库区地质灾害调查中的应用研究 总被引：2，自引：1，他引：1
本文以黄河班多一级水电站库区地质灾害调查为例,利用RS与GIS技术进行地质灾害信息提取与分析。在对卫星影像信息进行增强处理的基础上,通过GIS数据管理和空间分析功能对多源数据进行叠加分析,利用可视化工具—虚拟地理信息系统(VirtualGIS)构建研究区三维场景,多方位、多角度挖掘地质灾害信息。结果表明:采用RS与GIS技术可以快速、准确、高效地提取地质灾害信息和与之相关的地表信息,实现地质灾害调查与分析的目的。 相似文献
5.
时会省 《测绘与空间地理信息》2005,28(2):58-60
近年来,随着计算机技术、图形学理论、遥感技术、摄影测量技术及其相关技术的飞速发展,以2维方式处理3维空间数据已不能满足实际应用的需求。目前,利用成熟的2维或2、5维的空间数据处理技术,结合已有数据生成3维数据是当前解决3维GIS可视化技术问题的基础之一,因此,测绘成果的4D产品在3维GIS可视化中得到广泛应用。本文对4D产品在3维地表地形显示、数字城市3维虚拟等方面的应用及相关技术作以介绍。 相似文献
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V. M. Chowdary Yatindranath S. Kar S. Adiga 《Journal of the Indian Society of Remote Sensing》2004,32(1):59-73
Assessment of the environmental impact of Non Point Source (NPS) pollutants on a global, regional and localized scale is the
key component for achieving sustainability of agriculture as well as preserving the environment. The knowledge and information
required to address the problem of assessing the impact of NPS pollutants like Nitrogen (N), Phosphorus (P), etc., on the
environment crosses several sub-disciplines like remote sensing, Geographical Information System (GIS), hydrology and soil
science. The remote sensing data, by virtue of its potential like synopticity, multi-spectral and multi-temporal capability,
computer compatibility, besides providing almost real time information, has enhanced the scope of automation of mapping dynamic
elements, such as land use/land cover, degradation profile and computing the priority categorisation of sub-watersheds. The
present study demonstrates the application of remote sensing, GIS and distributed parameter model Agricultural Non-Point Source
Pollution Model (AGNPS) in the assessment of hazardous non-point source pollution in a watershed. The ARC-INFO GIS and remote
sensing provided the input data to support modelling, while the AGNPS model predicted runoff, sediment and pollutant (N and
P) transport within a watershed. The integrated system is used to evaluate the sediment pollution in about 2700 ha Karso watershed
located in Hazaribagh area of Jharkhand State, India. The predicted values of runoff and sediment yield copared reasonably
well with the measured values. It is important to emphasize that this study is not intended to characterise, in an exhaustive
manner. Instead, the goal is to illustrate the implications and potential advantages of GIS and remote sensing based Hydrology
and Water quality (H/WQ) modelling framework. 相似文献
7.
遥感影像数据与地理信息系统（geographic information system,GIS）矢量数据的配准是遥感与GIS集成的基础。目前遥感影像与矢量数据的配准关键在于遥感影像特征的提取,而现有遥感影像特征提取方法存在特征提取不完整、配准失败和精度不高等问题。由此提出了一种基于Mask R-CNN（region-based convolutional neural network）的遥感影像与矢量数据配准方法,首先,利用Mask R-CNN模型提取影像的道路交叉口作为影像控制点; 然后,依据几何拓扑关系筛选矢量数据道路交叉口作为矢量控制点,再根据遥感影像与矢量数据控制点的欧氏距离确定同名控制点;最后,以同名控制点为基础实现遥感影像与矢量数据的配准。选取上海市矢量数据和高分二号影像数据进行配准实验,实验结果表明, 所提方法鲁棒性强、精度高。 相似文献
8.
介绍了遥感影像融合技术,并对几种常见的遥感影像融合方法及其应用作了系统的阐述,以图像处理系统ERDAS为平台,利用济南市卫星遥感图像作为研究材料,讨论了ERDAS计算机图像处理的有关过程,研究了如何把水体从遥感图像中提取出来。结果表明：该提取水体的研究方法正确可行,可为地理信息专题制图提供重要的遥感基础信息。 相似文献
9.
我国地理信息产业现状分析 总被引：7，自引：2，他引：5
本文在对我国地理信息产业规模、主体、技术、人才等方面进行调查的基础上,分析了我国地理信息产业发展的总体现状,研究了我国地理信息产业发展的主要动力和发展方向,从基础地理信息资源、地理信息产权、市场机制、安全保密等方面指出了我国地理信息产业发展亟待解决的几个问题。 相似文献
10.
We performed an in-depth literature survey to identify the most popular data mining approaches that have been applied for raster mapping of ecological parameters through the use of Geographic Information Systems (GIS) and remotely sensed data. Popular data mining approaches included decision trees or “data mining” trees which consist of regression and classification trees, random forests, neural networks, and support vector machines. The advantages of each data mining approach as well as approaches to avoid overfitting are subsequently discussed. We also provide suggestions and examples for the mapping of problematic variables or classes, future or historical projections, and avoidance of model bias. Finally, we address the separate issues of parallel processing, error mapping, and incorporation of “no data” values into modeling processes. Given the improved availability of digital spatial products and remote sensing products, data mining approaches combined with parallel processing potentials should greatly improve the quality and extent of ecological datasets. 相似文献
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Integrated approach of using remote sensing and GIS to study watershed prioritization and productivity 总被引：1，自引：0，他引：1
Soil data obtained from soil resource inventory, land and climate were derived from the remote sensing satellite data (Landsat
TM, bands 1 to 7) and were integrated in GIS environment to obtain the soil erosion loss using USLE model for the watershed
area. The priorities of different sub-watershed areas for soil conservation measures were identified. Land productivity index
was also used as a measure for land evaluation. Different soil and land attribute maps were generated in GIS, and R,K,LS,C
and P factor maps were derived. By integrating these soil erosion map was generated. The mapping units, found not suitable
for agriculture production, were delineated and mapped as non-arable land. The area suitable for agricultural production was
carved out for imparting the productivity analysis; the land suitable for raising agricultural crops was delineated into different
mapping units as productivity ratings good, fair, moderate and poor. The analysis performed using remote sensing and GIS helped
to generate the attribute maps with more accuracy and the ability of integrating these in GIS environment provided the ease
to get the required kind of analysis. Conventional methods of land evaluation procedures in terms of either soil erosion or
productivity are found not comparable with the out put generated by using remote sensing and GIS as the limitations in generating
the attribute maps and their integration. The results obtained in this case study show the use of different kinds of data
derived from different sources in land evaluation appraisals. 相似文献
14.
农业遥感研究应用进展与展望 总被引：22，自引：0，他引：22
得益于中国自主遥感卫星、无人机遥感和物联网等技术的发展,中国农业遥感研究与应用在过去20年取得了显著进步,中国农业遥感信息获取呈现出天地网一体化的趋势;农业定量遥感在关键参数遥感反演技术方法与应用方面取得进展;作物面积、长势、产量、灾害遥感监测的理论与技术方法取得突破,农业遥感技术应用领域不断拓展。本文从农业遥感信息获取、农业定量遥感、农业灾害遥感、作物遥感识别与制图、作物长势遥感监测与产量预测、农业土地资源遥感等方面对中国农业遥感科研与应用进行了总结综述。 相似文献
15.
面向应用的海量高光谱影像处理与分析系统集成与实践 总被引：1，自引：0，他引：1
论述了基于VC 6.0平台开发的高光谱遥感影像处理与分析系统H IPAS V1.0TM系统关键技术与总体架构,详细讨论了面向海量高光谱影像数据框架设计和针对行业应用的系统集成思路。给出了基于航空平台的高光谱图像处理与分析系统的处理流程和业务模式。解决了海量遥感影像的处理、分析以及地表参量反演等关键问题,并针对具体行业应用(如水环境监测,植被生长监测,岩石矿物填图)提供基础支撑平台。并给出了H IPAS V1.0TM系统典型的应用实例。 相似文献
16.
A S Manjunatha M G Chandrasekhar A R Virupaksha S Adiga P P Nageswara Rao 《Journal of the Indian Society of Remote Sensing》2000,28(2-3):69-78
The remote sensing applications are growing very rapidly with the availability of high-resolution data from the state of the art satellites like IRS-1C/1D/P4. The advancement in computer hardware and software in the area of remote sensing also enhance the growth of remote sensing applications. IRS-1C/1D/P4 provides data with the resolution of 5.6m in panchromatic mode giving more information of the ground area covered. The remote sensing satellites with high-resolution sensors and wide coverage capabilities will provide the data with better resolution, coverage and revisit to meet the growing application needs. Many applications like crop acreage and yield estimation, draught monitoring and assessment, flood mapping, waste land mapping, mineral prospectus, forest resource survey etc., have become an integral part of the resources management system in the developing countries. These resource management systems need the data to be transferred in real time or near real time for processing. The transfer of data in real time or near real time calls for advanced data delivery techniques to deliver the data as quickly as possible. Processing of remote sensing data can be performed even on low cost personal computers, which in turn further increases the remote sensing applications enabling by setting up the processing centers even at grass root level i.e., at district, taluk or village level. Setting up of processing centers at grass root level demands for quick, cost effective and efficient data delivery mechanism to transfer remote sensing data with or without value added services. The digital revolution has reached broadcasting with the introduction of direct broadcasting of digital data. These modify the traditional data transfer techniques by separating the actual service from the transmission system, thus enabling the distribution of any kind of digital data to stationary, portable or mobile terminals. This allows remote sensing data to reach a large number of users simultaneously and independent of their location. This article highlights the concepts, possibilities, and implementation mechanisms to realize the remote sensing data transfer through direct broadcasting technique and enhance remote sensing applications. 相似文献
17.
甘肃省地图院利用国内外先进的现代测绘技术,构建了集地理信息采集、处理、贮存、管理于一体的信息化测绘生产体系,完成了信息化测绘生产基地的构建[1]。多源遥感数据快速自动处理技术应用研究是信息化测绘生产技术应用研究的一方面,主要是利用以信息化测绘生产基地为依托的遥感影像集群数据处理系统完成。本文主要探讨如何快速自动处理多源遥感数据,并以ADS80数据为例,对集群系统构建前后的效率进行对比实验。 相似文献
18.
Isi A. Ikhuoria 《Transactions in GIS》1999,3(4):343-358
The provision of geographical information systems (GIS), particularly as an integrator of digital cartographic principles, in West Africa is evaluated by examining the professionalism and manpower issues, trends of cartographic and GIS education and training, usage of modern technology and dissemination of spatial information as well as in terms of the level of regional co-operation. The analysis shows that there is potential for the rapid growth and recognition of the disciplinary and societal relevance of GIS in West Africa. This is indicated by the cartography, remote sensing, and GIS programmes being established in Nigerian and Ghanaian tertiary institutions, as well as the changes from analogue to digital mapping procedures in the public and petroleum oil organisations. 相似文献
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遥感与地理信息系统数据的信息量及不确定性 总被引：8，自引：0，他引：8
讨论了遥感、GIS数据的不确定性与信息论中的不确定性间的联系，导出了GIS图形数据与遥感影像数据的信息量估算式，提出了位置疑义度和属性疑义度等概念。在统一的数学基础上，估算几何位置误差和属性正确率不足引起的不确定性，从而建立起遥感影像与GIS图形数据的信息量及不确定性的统一量度。 相似文献
20.
本文初步研究了遥感、GIS和制图一体化实用技术方法。对黄土丘陵区和沙漠地区TM数据进行了特征信息分析;给出了分层分类和GIS辅助分类结果;经模糊推理和人机交互修改,将提“纯”的遥感专题数据作为GIS的动态信息源,对GIS进行扩充与更新;最后在GIS支持下分层提取专题图并进行辅助制图。 相似文献