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Mapping Spatial Distribution Characteristics of Lineaments Extracted from Remote Sensing Image Using Fractal and Multifractal Models

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Journal of Earth Science 2017年第3期28卷 507-515页

作者： Cheng Lyu Qiuming Cheng Renguang Zuo Xueping Wang State Key laboratory of Geological Processes and Mineral Resources China University of GeosciencesWuhan 430074China Faculty of Earth Resources China University of Geosciences Wuhan 430074China

Mapping mineral prospectivity in vegetated areas is a challenge. For this reason, we aimed to map spatial distribution characteristics of linear structures detected in remote sensing images using fractal and multifractal models. The selected study area was the Pinghe District of the Fujian Province（China）, located in the Shanghang-Yunxiao polymetallic and alunite ore belt（within the Wuyishan polymetallic belt）, where mineral resources such as copper, molybdenum, gold, silver, iron, lead, zinc, alunite and pyrophyllite have been discovered. The results of our study showed that：（1） the values of fractal dimension for all lineaments, NW-trending lineaments, and NE-trending lineaments, are 1.36, 1.32, and 1.23, respectively, indicating that these lineaments are statistically self-similar;（2） the fractal dimensions of the spatial distribution of the linear structures in the four selected hydrothermal-type ore deposits of the Pinghe District, named Zhongteng, Panchi, Xiaofanshan and Fanshan, are 1.43, 1.52, 1.37 and 1.37, respectively, which are higher than the mean value in South China;（3） the spatial distribution of the linear structures extracted from the remote sensing image and displayed by the contour map of fractal dimensions, correlates well with the known hydrothermal ore deposits; and（4） the results of the anomaly map decomposed by the spectrum-area（S-A） multifractal model is much better than the original fractal dimension contour map, which showed most of the known hydrothermal-type deposits occur in the high anomalous area. It is suggested that a high step tendency possibly matches with the boundary of the volcanic edifice and the deep fault controlling the development of the rock mass and the volcanic edifice. The complexity of the spatial distribution of mapped lineations（faults） in the Pinghe District, characterized by high values in the anomaly map, may be associated with the hydrothermal polymetallic ore mineralization in the study area.

关键词： fractal model ETM+ data vegetation coverage area Pinghe molybdenum deposit

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Evaluation of ERA-Interim Monthly Temperature data over the Tibetan Plateau

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Journal of Mountain Science 2014年第5期11卷 1154-1168页

作者： GAO Lu HAO Lu CHEN Xing-wei College of Geographical Sciences Fujian Normal University Fujian Provincial Engineering research Center for Monitoring and Assessing Terrestrial Disasters research Center for National Geographical Condition Monitoring and Emergency Support in the Economic Zone on the West Side of the Taiwan Strait College of Applied Meteorology Nanjing University of Information Science & Technology

In this study, surface air temperature from 75 meteorological stations above 3000 m on the Tibetan Plateau are applied for evaluation of the European Centre for Medium-Range Weather Forecasts(ECMWF) third-generation reanalysis product ERA-Interim in the period of 1979-2010. High correlations ranging from 0.973 to 0.999 indicate that ERA-Interim could capture the annual cycle very well. However, an average root-meansquare error(rmse) of 3.7°C for all stations reveals that ERA-Interim could not be applied directly for the individual sites. The biases can be mainly attributed to the altitude differences between ERA-Interim grid points and stations. An elevation correction method based on monthly lapse rates is limited to reduce the bias for all stations. Generally, ERA-Interim captured the Plateau-Wide annual and seasonal climatologies very well. The spatial variance is highly related to the topographic features of the TP. The temperature increases significantly(10°C- 15°C) from the western to the eastern Tibetan Plateau for all seasons, in particular during winter and summer. A significant warming trend(0.49°C/decade) is found over the entire Tibetan Plateau using station time series from 1979-2010. ERA-Interim captures the annual warming trend with an increase rate of 0.33°C /decade very well. The observation data and ERA-Interim data both showed the largest warming trends in winter with values of 0.67°C/decade and 0.41°C/decade, respectively. We conclude that in general ERA-Interim captures the temperature trends very well and ERA-Interim is reliable for climate change investigation over the Tibetan Plateau under the premise of cautious interpretation.

关键词：青藏高原温度数据评价中期天气预报变暖趋势第三代产品 ECMWF 气象观测站

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A simplified physically-based algorithm for surface soil moisture retrieval using AMSR-E data

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Frontiers of Earth Science 2014年第3期8卷 427-438页

作者： Jiangyuan ZENG Zhen LI Quan CHEN Haiyun BI Key laboratory of Digital Earth Science Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences Beijing 100094 China University of Chinese Academy of Sciences Beijing 100049 China

A simplified physically-based algorithm for surface soil moisture inversion from satellite microwave radiometer data is presented. The algorithm is based on a radiative transfer model, and the assumption that the optical depth of the vegetation is polarization independent. The algorithm combines the effects of vegetation and roughness into a single parameter. Then the microwave polarization difference index （MPDI） is used to eliminate the effects of surface temperature, and to obtain soil moisture, through a nonlinear iterative procedure. To verify the present algorithm, the 6.9 GHz dual-polarized brightness temperature data from the Advanced Micro- wave Scanning Radiometer （AMSR-E） were used. Then the soil moisture values retrieved by the present algorithm were validated by in-situ data from 20 sites in the Tibetan Plateau, and compared with both the NASA AMSR-E soil moisture products, and Soil Moisture and Ocean Salinity （SMOS） soil moisture products. The results show that the soil moisture retrieved by the present algorithm agrees better with ground measurements than the two satellite products. The advantage of the algorithm is that it doesn＇t require field observations of soil moisture, surface roughness, or canopy biophysical data as calibration parameters, and needs only single-frequency brightness temperature observations during the whole retrieval process.

关键词： passive microwave remote sensing soilmoisture inversion AMSR-E SMOS

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Digital Modeling and Visualization of Hydroelectric Engineering geoinformation

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Transactions of Tianjin University 2006年第4期12卷 303-307页

作者：刘东海钟登华李明超 School of Civil Engineering Tianjin University Tianjin 300072 China State Key laboratory of High-Velocity Flow Sichuan University Chengdu 610065 China

描述空间趋势和地质的结构的复杂关系，基于地理信息系统和水力发电的工程地质学信息的可视化的数字建模被介绍。信息的函数视觉质问，空间切，绘画的节，和有水力的结构的联合分析被认识到。地质的模型能与地质的结构的形状数据匹配属... 详细信息

描述空间趋势和地质的结构的复杂关系，基于地理信息系统和水力发电的工程地质学信息的可视化的数字建模被介绍。信息的函数视觉质问，空间切，绘画的节，和有水力的结构的联合分析被认识到。地质的模型能与地质的结构的形状数据匹配属性数据，并且为 3D 模型的空间质问和分析组织信息。用在 Laxiwa 水力发电的工程在上的应用 Huanghe 河在上游，方法提供 geoinformation，和溢洪道隧道的 geoinformationalong 轴的 3D 节看法的 a3D 平行节看法和质问结果，并且沿着有地下的结构的第 5 轴分别地。

关键词：地质模型工程地质地理信息系统可视化水电工程

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The Spectral Analysis and Application of Low-degree Modified Spheroidal Hotine Kernel

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Journal of Geodesy and geoinformation Science 2020年第3期3卷 104-114页

作者： Jian MA Ziqing WEI Hongfei REN State Key laboratory of Geo-information Engineering Xi’an 710054China Xi’an research Institute of Surveying and Mapping Xi’an 710054China Institute of Geospatial Information Information Engineering UniversityZhengzhou 450001China

The traditional spheroidal kernel results in the spectrum leakage,and the utilization rate of the removed degrees of the measured data is ***,a kind of spheroidal kernel whose high-and low-degrees are both modified is introduced in this research,which is exampled by the Hotine *** addition,the low-degree modified spheroidal kernel is *** cosine or linear modification factors can be *** modified kernel functions can effectively control the spectrum leakage compared with the traditional spheroidal ***,the modified kernel augments the contribution rate of the measured data to height anomaly in the modified frequency *** experimental results show that the accuracy of the quasi-geoid by the cosine or linear low-degree modified kernel is higher than that by the traditional spheroidal *** the accuracy equals the accuracy of the quasi-geoid using the spheroidal kernel with high-and low-degrees modified approximately when the low-degree modification bandwidths of these two kinds of kernels are the *** the computational efficiency of the low-degree modified kernel is much higher,the low-degree modified kernel behaves better in constructing the(quasi-)geoid based on Stokes-Helmert or Hotine-Helmert boundary-value theory.

关键词： the spheroidal Hotine kernel cosine low-degree modification linear low-degree modification spectral analysis spectrum leakage the contribution rate

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Spatiotemporal event detection: a review

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International Journal of Digital Earth 2020年第12期13卷 1339-1365页

作者： Manzhu Yu Myra Bambacus Guido Cervone Keith Clarke Daniel Duffy Qunying Huang Jing Li Wenwen Li Zhenlong Li Qian Liu Bernd Resch Jingchao Yang Chaowei Yang Department of Geography Pennsylvania State UniversityUniversity ParkPAUSA NASA Goddard Space Flight Center NASA Goddard Space Flight CenterGreenbeltMDUSA Department of Geography University of California-Santa BarbaraSanta BarbaraCAUSA Department of Geography University of Wisconsin-MadisonMadisonWIUSA Department of Geography and the Environment University of DenverDenverCOUSA School of Geographical Sciences and Urban Planning Arizona State UniversityTempeAZUSA Department of Geography University of South CarolinaColumbiaSCUSA NSF Spatiotemporal Innovation Center&Dept.of Geography and geoinformation Science George Mason UniversityFairfaxVAUSA Department of Geoinformatics University of SalzburgKapitelgasseSalzburgAustria Center for Geographic Analysis Harvard UniversityBostonMAUSA

The advancements of sensing technologies,including remote sensing,in situ sensing,social sensing,and health sensing,have tremendously improved our capability to observe and record natural and social phenomena,such as natural disasters,presidential elections,and infectious *** observations have provided an unprecedented opportunity to better understand and respond to the spatiotemporal dynamics of the environment,urban settings,health and disease propagation,business decisions,and crisis and *** event detection serves as a gateway to enable a better understanding by detecting events that represent the abnormal status of relevant *** paper reviews the literature for different sensing capabilities,spatiotemporal event extraction methods,and categories of applications for the detected *** novelty of this review is to revisit the definition and requirements of event detection and to layout the overall workflow(from sensing and event extraction methods to the operations and decision-supporting processes based on the extracted events)as an agenda for future event detection *** is presented on the current challenges to this research agenda,and future directions are discussed for conducting spatiotemporal event detection in the era of big data,advanced sensing,and artificial intelligence.

关键词： GeoAI geography and geoscience human dynamics digital earth computational challenges cloud computing internet of things

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High-resolution Remote Sensing Image Semi-global Matching Method Considering Geometric Constraints of Connection Points and Image Texture Information

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Journal of Geodesy and geoinformation Science 2022年第4期5卷 86-101页

作者： Xingbin YANG Jingguo LYU Shan JIANG Danlu ZHANG School of Geomatics and Urban Spatial Informatics Beijing University of Civil Engineering and ArchitectureBeijing 100044China Beijing Key laboratory of Urban Spatial Information Engineering Beijing 100044China

Dense matching of remote sensing images is a key step in the generation of accurate digital surface *** semi-global matching algorithm comprehensively considers the advantages and disadvantages of local matching and global matching in terms of matching effect and computational efficiency,so it is widely used in close-range,aerial and satellite image *** on the analysis of the original semi-global matching algorithm,this paper proposes a semi-global high-resolution remote sensing image that takes into account the geometric constraints of the connection points and the image texture information based on the large amount of high-resolution remote sensing image data and the characteristics of clear image *** method includes 4 parts:(1)Precise *** at the system error in the image orientation model,the system error of the rational function model is compensated by the geometric constraint relationship of the connecting points between the images,and the sub-pixel positioning accuracy is obtained;(2)Epipolar image *** the original image is divided into blocks,the epipolar image is generated based on the projection trajectory method;(3)Image dense *** order to reduce the size of the cost space and calculation time,the image is pyramided and then semi-globally matched layer by *** the matching process,the disparity map expansion and erosion algorithm that takes into account the image texture information is introduced to restrict the disparity search range and better retain the edge characteristics of the ground objects;(4)Generate *** order to test the matching effect,the weighted median filter algorithm is used to filter the disparity map,and the DSM is obtained based on the principle of forward ***,the paper uses the matching results of WordView3 and Ziyuan No.3 stereo image to verify the effectiveness of this method.

关键词： geometric constraints image texture information semi-global matching

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Determination of Land Surface Heat Fluxes at Different Temporal Scales over the Tibetan Plateau

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Journal of Geodesy and geoinformation Science 2021年第1期4卷 144-152页

作者： Yaoming MA Lei ZHONG Weiqiang MA Cunbo HAN Key laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau Researchthe Chinese Academy of SciencesBeijing 100101China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China University of Chinese Academy of Sciences Beijing 100049China School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China

Surface energy budget components(such as net radiation flux,sensible heat flux,latent heat flux and soil heat flux)at multiple temporal scales have significant meaning for understanding the energy and water cycle over the Tibetan Plateau(TP).In the framework of ESA-MOST Dragon Programme 4,the surface energy balance system(SEBS)was tested and used to derive surface heat fluxes at different temporal scales over the TP by a combination use of geostationary satellite(FY-2 C)data,polar orbiting satellite(SPOT/VGT,Terra/MODIS)data and ITPCAS forcing *** validation results show there is a good agreement between derived heat fluxes and in situ measurements from Third Pole Environment Observation and research Platform(TPEORP),which means the feasibility to derive surface heat fluxes over heterogeneous landscapes by a combination use of geostationary and polar orbiting satellite data in *** diurnal,seasonal and inter-annual variation characteristics were also clearly identified through analyses of derived turbulent fluxes.

关键词： sensible heat flux latent heat flux parameterization the Tibetan Plateau

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Feasibility Analysis of Performance Validation for Satellite Altimeters Using Tide Gauge and Deep-ocean Bottom Pressure Recorder

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Journal of Geodesy and geoinformation Science 2020年第1期3卷 102-109页

作者： Bin GUAN Zhongmiao SUN Xiaogang LIU Zhenhe ZHAI Xianping QIN State Key laboratory of Geo-information Engineering Xi’an 710054China Institute of Geography Spatial Information Information Engineering UniversityZhengzhou 450052China Xi’an research Institute of Surveying and Mapping Xi’an 710054China

Independent of traditional approach of satellite altimeter calibration, the feasibility of altimeter validation using tide gauge located on solitary island at open sea (TGSI) and deep-ocean bottom pressure recorder (DBPR) separately is initially studied. Bias of Jason-3 sea surface height (SSH) and relative SSH bias (Δbias) between Jason-2 and Jason-3 is calculated using the data of tide gauge on Harvest oil platform, tide gauge No. 1890000 and DBPR No. 21419. The standard deviations of calculated SSH bias sequence are 3.98 cm, 2.87 cm and 8.61 cm respectively, and Δbias (Jason-3—Jason-2) is -3.62± 2.17 cm , -2.58±1.97 cm and -2.60±1.30 cm respectively. Comparing to the results reported by international calibration sites, the results show that Jason-3 SSH is 3.0 cm lower than that of Jason-2, the selected DBPR is appropriate to the calculation of relative SSH bias between Jason-2 and Jason-3, but it is not suitable for calibration or validation of single satellite, TGSI is appropriate to both.

关键词： satellite altimetry altimeter calibration tide gauge Deep-ocean Assessment and Reporting of Tsunamis relative bias pressure recorder

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Geometrical feature analysis and disaster assessment of the Xinmo landslide based on remote sensing data

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Journal of Mountain Science 2017年第9期14卷 1677-1688页

作者： FAN Jian-rong ZHANG Xi-yu SU Feng-huan GE Yong-gang Paolo TAROLLI YANG Zheng-yin ZENG Chao ZENG Zhen Key laboratory of Mountain Hazards and Earth Surface Process Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 China University of Chinese Academy of Sciences Beijing 100049 China Department of Land Environment Agriculture and Forestry University of Padova Agripolis viale dell'Universita 16 35020 Legnaro (PD) Italy Sichuan Remote Sensing Information Surveying and Mapping Institute Uhengdu 610100 Uhina Sichuan Engineering research Center for Emergency Mapping & Disaster Reduction/Sichuan Geomatics Center Chengdu 610041 China

At 5:39 am on June 24, 2017, a landslide occurred in the village of Xinmo in Maoxian County, Aba Tibet and Qiang Autonomous Prefecture(Sichuan Province, Southwest China). On June 25, aerial images were acquired from an unmanned aerial vehicle(UAV), and a digital elevation model(DEM) was processed. Landslide geometrical features were then analyzed. These are the front and rear edge elevation, accumulation area and horizontal sliding distance. Then, the volume and the spatial distribution of the thickness of the deposit were calculated from the difference between the DEM available before the landslide, and the UAV-derived DEM collected after the landslide. Also, the disaster was assessed using high-resolution satellite images acquired before the landslide. These include Quick Bird, Pleiades-1 and GF-2 images with spatial resolutions of 0.65 m, 0.70 m, and 0.80 m, respectively, and the aerial images acquired from the UAV after the landslide with a spatial resolution of 0.1 m. According to the analysis, the area of the landslide was 1.62 km2, and the volume of the landslide was 7.70 ± 1.46 million m3. The average thickness of the landslide accumulation was approximately 8 m. The landslide destroyed a total of 103 buildings. The area of destroyed farmlands was 2.53 ha, and the orchard area was reduced by 28.67 ha. A 2-km section of Songpinggou River was blocked and a 2.1-km section of township road No. 104 was buried. Constrained by the terrain conditions, densely populated and more economically developed areas in the upper reaches of the Minjiang River basin are mainly located in the bottom of the valleys. This is a dangerous area regarding landslide, debris flow and flash flood events Therefore, in mountainous, high-risk disaster areas, it is important to carefully select residential sites to avoid a large number of casualties.

关键词：山体滑坡几何特征灾害评价遥感数据空间分辨率数字高程模型航拍图像空间分布

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