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西南岩溶山区,植被茂密,地形陡峻,传统地面岩溶调查手段效率低且危险性高。本文采用机载LiDAR技术,获取四川某抽水蓄能电站库区激光点云和光学影像数据,结合室内解译和野外复核,开展区域岩溶识别工作。查明了库区内岩溶发育分布情况,根据岩溶形态划分为岩溶漏斗、岩溶洼地及落水洞3类。基于已有资料和LiDAR数据成果提取库区高程、坡度、坡向、构造、岩性及汇水区因子,并分析了岩溶发育的分布规律。结果表明,无人机机载LiDAR技术可精准快速识别抽水蓄能电站库区岩溶分布特征,为水电站前期勘察设计提供了新的技术手段。 相似文献
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平面遥感通过阴影体现立体感,其立体效果一般较差;卫星三维遥感通过DEM体现立体感,有较好的立体效果,但由于卫星平台太高,难以体现较小的地形起伏,而且陡坎处影像容易出现拉伸变形;无人机三维遥感立体效果最好,由于获取影像的平台较低,细微的地形起伏均可以较好地反映.本文针对传统方法在构造解译上的不足,利用无人机获取岩溶隧址区遥感数据建立三维遥感影像模型,进行岩溶构造解译,并与传统构造解译方法做了对比.结果 表明,无人机三维遥感解译可以大大提高隧址区岩溶构造解译的精度和可信度,可为岩溶地区的隧道施工提供准确基础资料. 相似文献
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在地理国情普查项目中会综合运用多种卫星影像进行地表覆盖解译作业,常用的影像有WorldView-2、QuickBird、Kompsat、环境卫星等影像。将Kompsat和WorldView-2两种卫星影像进行综合对比并总结二者的适用场景,采用两种不同的自动解译软件分别对两种影像的相同区域进行解译效果对比,分析自动解译各个环节的用时,评价两种影像的解译效果,总结两种影像在地理国情普查项目中的应用建议。探讨了Kompsat和WorldView-2影像适用场景,得出了Kompsat和WorldView-2影像在地理国情普查项目中适用性的结论。 相似文献
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遥感影像解译是一个不断发展的研究方向,随着日新月异的遥感应用需求、高分辨率遥感数据的快速发展、地理知识的日积月累、以及人工智能技术的发展,亟需发展自动化、智能化的遥感影像解译技术。本文针对遥感影像智能解译,首先从遥感影像解译单元、分类方法、解译认知3个方面阐述遥感影像解译的研究进展,然后提出了面向地理场景的 “地理知识图谱构建—深度学习模型构建—地理知识图谱与深度学习模型协同的遥感影像语义分类”遥感影像智能解译总体框架,并给出初步试验成果,最后对智能解译的重要发展趋势予以展望,以期拓展遥感影像智能解译研究的思路与方法,提高遥感影像智能解译的精细程度和智能化水平,使智能解译具备地理空间理解能力,推动“数据—信息—知识—智能”的深度转化。 相似文献
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遥感影像解译标志库的建立和应用 总被引：2，自引：0，他引：2
在遥感影像解译标志库中,全面、综合地总结了各种解译要素和常见的各种典型地物及其解译标志。该库具有全面性、综合性、开放性和包容性的特点。同时,结合该遥感影像解译标志库,成功地实现了对研究区的遥感地质解译。根据所建立的解译标志库系统地总结了研究区各种岩性的遥感影像特征;解译结果与1:200000地质资料相对比,共发现18处影像特征与其不一致的地方。经野外验证,根据解译标志库所建立的不同岩性的解译标志及解译结果是准确可靠的。 相似文献
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P. Srinivasan 《Journal of the Indian Society of Remote Sensing》1988,16(1):55-62
Of late, airphoto interpretation and Landsat imagery analysis play a vital role in geological mapping for detailed hydrogeological investigations for ground water prospecting. Certain obscure features like lineaments/fracture zones which are masked by surface soil and cultivated lands are easily visible. In hard rocks like granites and basalts the occurrence and movement of ground water are controlled by the fracture pattern. Delineation of potential zones of ground water for successful exploration is possible by the study and analysis of aerial photographs, visual interpretation of Landsat imagery and interactive data analysis system through computer techniques and applications. These techniques constitute for data integration with conventional methods of hydrogeological investigations and exploratory drilling. As a case study an area of 1500 sq km in part of the Narmada river basin of Madhya Pradesh and also forming a portion of Narmada Sagar area covered under topo sheets 46 N/12 and 46 N/16 was taken up. Aerial photographs pertaining to the area of study and Landsat imagery of band 5 and 7 in scale blown upto 1∶250,00 were scanned and analysed. It was observed that the successful artesian wells are located in pominent lineament/fractured zones in the study area. It is also recommended after through analysis different hyddromorphic zonations for future exploration of ground water. 相似文献
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The conventional visual interpretation of landsat Imagery is potentially the most useful remote sensing tool for the study of channel migration & water logging conditions at different time spans; which were earlier not easy due to non availability of suitable evidences. The present study brings out, in exact terms & the extent of the utility of the false colour and black and white landsat data. The application of the false colour scanning method is also useful remote sensing tool for the study of direct & indirect hydrogeological regime by visual interpretation technique. The spectrum are favourable for detection of surface phenomenon, which is associated with the subsurface ground water environment. An area of about 3,500 Sq.Km. of U.P. along left bank of Ghaghra river and right bank of Terhi rivers have been taken for the study. The paper was designed to evaluate the fluvial action and ground water environments with the help of repetitive landsat data in ten years. The fluvial action of Ghaghra and Terhi rivers have been mainly contributing to the development of hydrogeomorphological units which have given exact references regarding fluctuation in hydrogeomorphological units and water logging with hydrological response of the ground water environment, by using landsat data of 1975 & 1984. Further the direct relationship between remote sensing measurement and physical properties of hydrogeological environments is brought out in the maps. 相似文献
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遥感技术在工程地质选址工作中的应用 总被引：1，自引：0，他引：1
通过遥感工程地质选址工作的系统分析，总结了区域地形地貌条件、岩土体条件、地质构造条件、地质灾害发育情况和水文
地质条件等工程地质条件的研究内容和工作方法，指出了遥感工程地质选址工作中应注意的问题。 相似文献
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Y Srinivasa Rao T V Krishna Reddy P T Nayudu 《Journal of the Indian Society of Remote Sensing》1997,25(3):187-194
To evaluate the hydrogeomorphological conditions of Niva river basin Chittoor district, Andhra Pradesh, geological, hydrogeological and geomorphological studies were carried out. through visual interpretation of Landsat 5, FCC with adequate ground truth. The study shows that the Niva river basin is occupied by granites and gneisses of Archaean age with intrusive bodies of dolerites. The recent alluvium deposits are present along the stream courses. The study area is traversed by various directional fractures/lineaments and most of them are NESW, ENE-WSW and EW directions. Groundwater potential of geomorphological units viz. Denudational hill, Residual hill, Pediment, Pediplain and Valley fill is discussed. 相似文献
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遥感化探信息综合分析在地质找矿中的应用研究 总被引：12，自引：0，他引：12
利用适当比例尺的遥感资料对新疆三区林场金化探异常进行了综合解译分析和评价,并圈定了多处金矿(化)体,在遥感与化探相结合进行地质找矿方面取得了明显效果。 相似文献
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S Das S C Behera A Kar P Narendra S Guha 《Journal of the Indian Society of Remote Sensing》1997,25(4):247-259
Identification of fractures/lineaments and hydrogeomorphic units is prerequisite for undertaking ground water exploration and development in any terrain. Use of satellite remote sensing techniques coupled with aerial photo-interpretation greatly aid in planning ground water exploration, and pin pointing well sites In this study, airborne and space borne data was used for qualitative evaluation of ground water resources and a critical appraisal of such study in combination with hydrogeological and hydrogeophysical techniques for ground water exploration and development in Keonjhar district of Orissa. The study area has been divided into various geomorphic units based on visual interpretation of Landsat (TM) false colour composite on. 1:2,50,000 scale and the ground water potential of each of the units is qualitatively assessed. Digital image processing techniques such as principal component analysis and brightness index were used for generating classified outputs. The features like valley fills, pediments ete appeared clearly on the classified image. Directional filtering brought out minor fractures/lineaments crisply. The study has revealed the significance of different hydrogeomorptuc units and lineaments in Controlling ground water potential of the area. The findings were corroborated by resalts of drilling and resistivity soundings. 相似文献
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本文以LandsatTM图像为主信息源,对研究区内影响土地持续利用的自然环境要素地貌、地表土壤质地、温度、湿润度和地势进行了遥感判读。在综合分析制约区域内部土地资源持续利用的环境问题基础上,提出了土地利用与环境相互协调的发展途径。 相似文献
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R. Welch 《The Photogrammetric Record》1966,5(28):289-306
During the summer of 1965, colour, false colour, infra-red and panchromatic photography was flown of the Breidamerkur Glacier area in south-east Iceland. Subsequent comparative interpretation studies of the film types have indicated that colour photography is superior for the interpretation of glacierized? areas. This is attributed to brightness qualities and a continuous colour tone range, which, in this instance, closely matched visual representation of ground objects. The false colour film, due to the striking tonal qualities of vegetation and moisture, is considered best for studies involving the delimitation of these features. Panchromatic film appears to be satisfactory for general interpretation work, particularly where the utmost in definition is called for. The infra-red film, because of the dark tones produced by gravels and the subsequent high contrasts between ice and gravel debris on the ice surface, is considered a poor choice for the interpretation of glacierized areas. 相似文献
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豫北盐碱化土壤的遥感影像特征及成因机理浅析 总被引：1，自引：0，他引：1
遥感资料的分析表明,豫北土壤盐渍化受半干旱气候、圈闭地形和浅埋藏地下水等因素制约。黄河侧渗为本区提供了丰富的地下水和盐份。地表及埋藏古河道与决口扇造就了该区复杂的微地貌与水文地质结构,并决定了盐渍化程度和类型。本区盐渍化的宏观地质背景是难以改变的,但微观地质环境可以改造。盐渍化土壤的主要治理目标应是经常保持水盐动态平衡,不断采取措施淡化地下水盐份,使土壤含盐浓度从结晶浓度向低盐浓度转化。那种期望一次治理可永远根绝盐渍化的想法是不现实的。 相似文献