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Multiresolution Terrian Model in GIS

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测绘学报 2002年第Z1期31卷 92-98页

作者： ZHANG Jin 1,TONG Xiao hua 2 (1. department of surveying and mapping, taiyuan university of technology,{4.,china 2. department of surveying and Geo informatics, Tongji university, Shanghai 200092,china) department of surveying and mapping Taiyuan University of Technology Taiyuan 030024 department of surveying and Geo-informatics Tongji University 上海 200092

DEM, which becomes a major component of geographic information processing in earth and engineering sciences, has been studied in the GIS literature for a long time. We use DEM to represent the terrain in GIS. The more data are available, the better representations of a terrain can be built. But not all tasks in the framework of a given application necessarily require the same accuracy, and even a single task may need different levels of accuracy in different areas of the domain. Multiresolution models, such as LOD, offer the possibility of representing and analyzing a terrain at a range of different levels of detail. In this paper, some key issues in multiresolution DEM model are studied. Three main models are focused on Hierarchical TIN(HTIN), multiresolution terrain model based Delaunay and Hierarchical Dynamic Simplification. The advantages and disadvantages of these methods are analyzed. The technology of tile to tile edge match is studied to maintain the consistency between adjacent edges and tile edges in HTIN model. And the Hypergraph based Objected oriented Model(HOOM) is presented to divide and code spatial area and describe the terrain feature in adding and deleting points based on Delaunay rule retriangulating. The conclusions have been drawn in the end.

关键词： DEM multiresolution LOD GIS

High-accuracy topographical information extraction based on fusion of ASTER stereo-data and ICESat/GLAS data in Antarctica

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Science china Earth Sciences 2009年第5期52卷 714-722页

作者： E DongChen1,3,SHEN Qiang2,XU Ying1,3 & CHEN Gang4.1 Chinese Antarctic Center of surveying and mapping,Wuhan university,Wuhan 4.0079,china 2 Institute of Seismology{4. Earthquake Administration,Wuhan 4.0071,china 3 Key Laboratory of Polar surveying and mapping,State Bureau of surveying and mapping,Wuhan university,Wuhan 4.0079,china 4.department of Geography,university of Calgary,Calgary,Alberta T2N 1N4.Canada Chinese Antarctic Center of surveying and mapping Wuhan University Wuhan China Key Laboratory of Polar surveying and mapping State Bureau of Surveying and Mapping Wuhan University Wuhan China Institute of Seismology china Earthquake Administration Wuhan China department of Geography University of Calgary Calgary Canada

In order to better support Antarctic inland ice sheet expedition from Zhongshan Station to Dome A,the topographic data are *** present,although the entire Antarctic DEM provided by RAMP(Ra-darsat Antarctic mapping Project) was estimated at the highest horizontal(spatial) resolution of about 200 m,the real horizontal resolution of the DEM varies from place to place depending on the density and scale of the original source *** ice shelves and the inland ice sheet,the horizontal resolution is about 5 km;the vertical accuracy is estimated to be ±50 m in interior East Antarctic ice sheet and away from the mountain ***,more accurate topographic data are unavailable in *** order to meet the requirements of high-accuracy topographic information for further researches,this paper mainly addresses a fusion study of ASTER stereo pairs and ICESat/GLAS altimetry data for extraction of high-accuracy DEM in East Antarctica,based on the high horizontal resolution(15 m) of ASTER and vertical accuracy(13.8 cm) of ICESat/***,some altimetry data were selected as vertical control points to reduce errors of image correlation matching during the extraction of ASTER-based ***,ice sheet altimetry data derived from ICESat were used to generate DEM ranging from 75° to 81°S because existing ASTER data do not cover this area and high density of the coverage of ICESat altimetry ***,the DEM in coverage of the expedition route was *** analysis of result reveals that the DEM accuracy is improved *** absolute vertical accuracy of DEM is higher than 15 m in some cases and higher than 30 m for all the areas along the expedition route except from the 009-001 scene;the interior accuracy is higher than 15 m and higher than 7 m in some *** can meet the requirements of topographic map at 1:50000 scale,which is an economic and advantageous method to produce the topographic products.

关键词： DEM Antarctica Zhongshan Station Dome A ASTER ICESat GLAS

VERTEX-PRIMITIVE 1/2-TRANSITIVE GRAPHS

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Systems Science and Mathematical Sciences 1996年第1期9卷 76-82页

作者： DU Shaofei(department of Mathematics, Shanxi university, taiyuan 030006, china) 山西大学数学系山西太原 030006

ＶＥＲＴＥＸ－ＰＲＩＭＩＴＩＶＥ１／２－ＴＲＡＮＳＩＴＩＶＥＧＲＡＰＨＳ￥ＤＵＳｈａｏｆｅｉ（ＤｅｐｏｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＳｈａｎｘｉＵｎｉｖｅｒｓｉｔｙ，Ｔａｉｙｕａｎ０３０００６，Ｃｈｉｎａ）... 详细信息

ＶＥＲＴＥＸ－ＰＲＩＭＩＴＩＶＥ１／２－ＴＲＡＮＳＩＴＩＶＥＧＲＡＰＨＳ￥ＤＵＳｈａｏｆｅｉ（ＤｅｐｏｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＳｈａｎｘｉＵｎｉｖｅｒｓｉｔｙ，Ｔａｉｙｕａｎ０３０００６，Ｃｈｉｎａ）Ａｂｓｔｒａｃｔ：Ｉｎｔｈｉｓｐａ...

关键词： transitive graph orbital graph primitive group.

Annual integral changes of time serial NDVI in mining subsidence area

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中国有色金属学会会刊：英文版 2011年第S3期21卷 583-588页

作者： MA Chao1, GUO Zeng-zhang1, ZHANG Xiao-ke2, HAN Rui-mei1 1. Key Laboratory of Mine Spatial Information Technologies of State Bureau of surveying & mapping, Henan Polytechnic university, Jiaozuo 4.4.00, china 2. School of Coal Mining Engineering,{4., taiyuan 030024, china

By means of MORTRAN4.model of FLASSH module, an atmospheric correction of the SPOT II/IV data of four-year period for eight experimental coal faces of Lu'an mine area was done. The mining-affected zones were obtained with probability integral method. The normalized difference vegetation index (NDVI) and its mean were obtained by band ratio calculation at the mining subsidence area. Using FOURIER4.model of the fast Fourier transform (FFT) of discrete Fourier analysis theory, the mean NDVI time series data set was reconstructed. With the mean of NDVI transformed into amplitude and the phonological information transformed into phase, the law of NDVI variation by monthly, quarterly, annual were obtained. The annual integral of the time series of NDVI Fourier function (ANDVI) was obtained. The results show that an experience formula of ANDVI variation accompanies with mining time; A fast estimation formula of NPP by means of a coefficient of mining disturbance such as γ.

关键词： Lu’an mine area annual integral of NDVI net primary productivity coefficient of mining disturbance

C_(60)与有机胺电荷转移配合物的吸光特性比较研究

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光谱学与光谱分析 1999年第6期19卷 794-797页

作者：乔锦丽晋卫军山西大学化学系太原030006 太原理工大学材料工程学院太原030021

考察了甲苯、ＣＣｌ４和环己烷三种溶剂体系中，Ｃ６０同Ｎ，Ｎ－二甲基苯胺（ＤＭＡ）、二乙胺（ＤＥＡ）及三乙胺（ＴＥＡ）电荷转移配合物（ＣＴＣ）的吸光特性。发现不同胺同Ｃ６０作用的程度在不同溶剂介质中均存在如下顺序：环... 详细信息

考察了甲苯、ＣＣｌ４和环己烷三种溶剂体系中，Ｃ６０同Ｎ，Ｎ－二甲基苯胺（ＤＭＡ）、二乙胺（ＤＥＡ）及三乙胺（ＴＥＡ）电荷转移配合物（ＣＴＣ）的吸光特性。发现不同胺同Ｃ６０作用的程度在不同溶剂介质中均存在如下顺序：环己烷＞ＣＣｌ４＞甲苯。而在同一溶剂介质中，不同胺同Ｃ６０作用的程度各不相同。测定了电荷转移配合物在不同溶剂介质中的摩尔吸光系数及形成常数。

关键词：电荷转移配合物二甲基苯胺二乙胺三乙胺碳60

Error matching detection and robust estimation adjustment approach for map conflation

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Science china(Technological Sciences) 2008年第S1期51卷 48-61页

作者： TONG XiaoHua & DENG SuSu department of surveying and Geo-informatics,Tongji university,Shanghai 200092,china department of surveying and Geo-informatics Tongji University

The conflation of geographic datasets is one of the key technologies in the realm of spatial data capture and integration in geographic information system (GIS). Map conflation is a complex process of matching and merging spatial data. Due to various reasons such as errors in original data related to map data discrepancies,a great amount of uncertainties exists during the process and this will result in errors in featuring matching,especially point feature. Thus,it is vital to develop the method to detect the errors in feature matching and further the conflation results will not be affected. In this paper,error matching detection and robust estimation adjustment methods are proposed for map conflation. The characteristics of errors in feature matching are first analyzed,then a new approach for map conflation based on the least-squares adjustment is presented,and a robust estimation adjustment method is further proposed to detect and process matching errors. The results of the map conflation test show that the proposed method not only determines the errors in feature matching,but also obtains the optimal merging results in map conflation.

关键词： map conflation robust estimation error feature matching uncertainty

Vision navigation algorithm for mine agent based on quaternion

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中国有色金属学会会刊：英文版 2011年第S3期21卷 610-615页

作者： LI Ke-zhao1, 4. LEI Wei-wei1, 2, GUO Zeng-zhang1, 2, WU Li-xin3, ZHANG Qin4.1. School of Survey and Land Information Engineering, Henan Polytechnic university, Jiaozuo 4.4.03, china 2. Key Laboratory of Mine Spatial Information Technologies of State Bureau of surveying and mapping, Henan Polytechnic university, Jiaozuo 4.4.03, china 3. College of Resources and Civil Engineering, Northeastern university, Shenyang 110819, china 4. College of Geology Engineering and Geomatics, Chang’an university, Xi’an 710054. china School of Survey and Land Information Engineering Henan Polytechnic University Jiaozuo 454003 China College of Geology Engineering and Geomatics Chang'an University Xi'an 710054 China Key Laboratory of Mine Spatial Information Technologies of State Bureau of surveying and mapping Henan Polytechnic University Jiaozuo 454003 China College of Resources and Civil Engineering Northeastern University Shenyang 110819 China

Autonomous relative navigation is the key technology in mining or rescuing. On the basis of mine requirement and the theories of machine vision, an autonomous relative navigation algorithm for mine agent based on quaternion was proposed. In rotation transformation, this algorithm was represented by using quaternion. Because the Jacobi matrix of this method is lower than that of Hall algorithm, the calculation efficiency is improved by using this algorithm. The results of these experiments show that the computation burden of this algorithm based on quaternion is about half that of Hall algorithm. This algorithm based on quaternion is improved as a valid way to solve the problem of mine real-time navigation.

关键词： quaternion mine agent vision navigation

Gradient analysis of landscape spatial and temporal pattern changes in Beijing metropolitan area

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Science china(Technological Sciences) 2010年第S1期53卷 91-98页

作者： YANG YeTao1,ZHOU QiMing2,GONG JianYa3 & WANG YingYing4.1 Institute of Geophysics and Geomatics,china university of Geosciences,Wuhan 4.0074.china 2 department of Geography,Hong Kong Baptist university,Hong Kong 3 State Key Laboratory of Information Engineering in surveying,mapping and Remote Sensing,Wuhan university,Wuhan 4.0074.china 4.Hubei Provincial Bureau of Meteorology,Wuhan 4.0074.china Institute of Geophysics and Geomatics China University of Geosciences Wuhan China department of Geography Hong Kong Baptist University Hong Kong China State Key Laboratory of Information Engineering in surveying Mapping and Remote Sensing Wuhan University Wuhan China Hubei Provincial Bureau of Meteorology Wuhan China

The gradient based landscape metrics analysis is now widely used to study the landscape pattern changes in respond to the *** order to discover the trend of spatio-temporal changes in Beijing metropolitan area during the past 15 years,several landscape metrics are computed using a moving window along a 96 km long transect across Beijing metropolitan area from west to ***,the spatial extent of sub-landscape,which is determined by the moving window’s size,is profoundly *** results show that the metrics varies smoothly and regularly along the selected transect when the window size is greater than 6 km×6 km,and irregularly fluctuated for the smaller window size,that the spatial and temporal landscape characteristics of Beijing city match the hypothetical framework of spatio-temporal urban sprawl in the form of alternating processes of diffusion and coalescence well,and that some new trends of the urban sprawl style in Beijing metropolitan area,such as leap-frog manner,are also detected by the gradient landscape analysis.

关键词： gradient analysis landscape metrics spatio-temporal urban expansion multi-extent

Modeling uncertainty in geographic information and analysis

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Science china(Technological Sciences) 2008年第S1期51卷 38-47页

作者： SHI WenZhong Advanced Research Centre for Spatial Information technology,department of Land surveying and Geo-Informatics,the Hong Kong Polytechnic university,Hung Hom,Kowloon,Hong Kong,{4. Advanced Research Centre for Spatial Information technology Department of Land Surveying and Geo- Informatics the Hong Kong Polytechnic University

Uncertainty modeling and data quality for spatial data and spatial analyses are im-portant topics in geographic information science together with space and time in geography,as well as spatial analysis. In the past two decades,a lot of efforts have been made to research the uncertainty modeling for spatial data and analyses. This paper presents our work in the research. In particular,four progresses in the re-search are given out: (a) from determinedness-to uncertainty-based representation of geographic objects in GIS; (b) from uncertainty modeling for static data to dy-namic spatial analyses; (c) from modeling uncertainty for spatial data to models; and (d) from error descriptions to quality control for spatial data.

关键词： uncertainty quality control spatial data spatial analysis spatial model