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  • 2007 Volume 9 Issue 2
    Published: 25 April 2007
      
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  • ARTICLES
    Congratulations on the GIS Forum of the Institutions of Higher Learning in China
    CHEN Shupeng
    2007, 9(2): 1-2.
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    This is a latter to congratulate the successful convening of the forum on GIS of the instituteions of higher learning held for the first time in Beijing in December 2006.In his letter,the author reviews the great contributions made by the colleges and universities to the development of GIS science and technology in China in the past 20 years.
  • ARTICLES
    The Development of 3S Technology in the Field of Coal and Its Application
    ZHANG Wenruo, XIE Zhiqing
    2007, 9(2): 3-5.
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    As an important support technology for construction of digital China and digital city,3S technology(RS,GPS and GIS) has been developed rapidly in recent years.Aerophotogrammetry & Remote Sensing Bureau of China Coal is a sole high-tech organization engaged in global information acquisition,research,development and application in China National Administration of Coal.Tracking international technology development,committed to digital China construction and promoted to the application of the 3S integration technology in recent years,the Aerophotogrammetry & Remote Sensing Bureau of China Coal has acquired a series of 3S application achievements in the social and economic fields and established a distinct 3S technology application system.
  • ARTICLES
    Oil-field Data Management Solution Using ArcGIS
    HUANG Guangyu, SHEN Zhanfeng, WANG Runsheng
    2007, 9(2): 6-8,19.
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    As a spatial information analysis technology,GIS has been applied to petroleum industry widely,and digital oil-field has been a main solution for current oil-field construction,especially for the issues of data redundancy storage and sharing during the construction of oil field.Aiming at the problems of large-volume data storage and difficulty to share in Daqing Oil Field exploration and exploitation,this paper firstly analyzes the existing spatial and non-spatial data sharing problems that face the oil-field exploration,exploitation and construction,and then analyzes the sharing environment of spatial and non-spatial oil-field data based on sharing platform,finally presents the oil-field data management and sharing solution based on the ArcGIS platform.
  • ARTICLES
    The Analysis on Spatial-temporal Evolution of Beach Cultivation and Its Policy Driving in Xiamen in Recent Two Decades
    LIN Qiaoying, LIN Guangfa, CHEN Zhihong, CHEN Youfei
    2007, 9(2): 9-13.
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    The beach is an important wetland resource and renewable reserve land resource.The spatial-temporal evolution of beach cultivation can sensitively reflect the gambling relationship among the industrial economic development,the eco-environmental change and the policy guide in the seaside city.Through interpretation,analysis and statistic to the four temporal TM remote sensing images in 1986,1989,1993 and 1997 and the two temporal ETM+ remote sensing images in 2001 and 2003 as well as the SPOT remote sensing image in 2004,the spatial-temporal evolution patterns of beach cultivation are analyzed with the single land use dynamic index,landscape fragmentation and the model on changes of gravity center in Xiamen in recent two decades.The results indicate that:the area of beach cultivation had increased continuously from 2 661.85 hm2 in 1986 to 9 776.45 hm2 in 2003,more than 2.67 times,and then it started to drop to 9 510.98 hm2 in 2004,and the average annual rate of change had gradually dropped from 19.80% during 1986 to 1989 to-2.72% during 2003 to 2004;landscape fragmentation was all smaller than 0.00080 during 1986 to 2004;and the gravity center of beach cultivation had moved northeast on the whole.The preliminary study on the policy driving mechanism about the spatial-temporal evolution of beach cultivation suggests that,there is a macroscopic response relationship between this kind of evolution pattern of beach cultivation and a series of the local policies and measures.
  • ARTICLES
    Effect of DEM Resolution on Simulation of Solar Radiation
    YANG Xin, TANG Guoan, XIAO Chenchao
    2007, 9(2): 14-19.
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    The development of digital terrain analysis based on DEM is helpful for the simulation of solar radiation in rugged area.However the effect of DEM scale causes great uncertainty to the simulation.Taking loess hilly area and Qingling Mountain as test area,this paper studies the relationship between simulated astronomic radiation and DEM resolution through simulating daily,monthly and yearly astronomic radiation based on a serial of DEMs with different resolutions.The experimental result shows that simulated astronomic radiation increases gradually with the decrease of DEM resolution.When DEM grid cell size is greater than the relative heights of the test area,the radiation simulated is stable and the terrain factors such as slope gradient and aspect do not affect on the redistribution of solar radiation any more.In loess hilly area,when DEM grid cell sizes close to 1 000m the relative error of the annual astronomic radiation is about 22%,exceeding the winter’s radiation in this area.In Qingling mountainous area,errors are relative small and the maximum relative error is 17.8%.In a word,the impacts of DEM resolution on the simulation of the solar radiation are much greater in hilly area than in the mountainous area.
  • ARTICLES
    Application of Bayes Classification in Forecasting the Trajectories of MCS
    GUO Yafen, GUO Zhongyang, SU Junyi, DAI Xiaoyan
    2007, 9(2): 20-23,42.
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    The relationship between the intensive precipitation caused severe flood in the Yangtze River Basin and the trajectories of Mesoscale Convective System(MCS) over the Tibetan Plateau is close.In order to find the relationship between the trajectories of MCS and the environmental physical field values around MCS,GMS(Geostationary Meteorological Satellite) brightness temperature(Tbb) data and High Resolution Limited Area Analysis and Forecasting System(HLAFS) data from June to August in 1998 are used to build the database of MCS environmental physical field feature values.Based on these,Bayes Classification is applied to train and predict the dataset of MCS environmental physical field feature values at the levels of 400hPa and 500hPa,respectively.Consequently,it is proven that Bayes Classification is effective to predict the trajectories of MCS.
  • ARTICLES
    Research on Population Spatial Distribution and Driving Mechanics in Jingjiang Flood Diversion Area
    ZHANG Hong, YANG Xiaohuan, WANG Xinsheng, YU Ruilin
    2007, 9(2): 24-30.
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    Population distribution and its change rule have become the focus and frontier of demography and geographic information science.Based on the data gained from the fourth and fifth national census(1990 and 2000),related statistical data of 2005,and with the help of the national resource and environment database,we investigate the demographic distribution changes of population quantity,population structure,population even degree and kilometer grid-based population distribution of every village and town in Jingjiang flood diversion area.We also analyze the driving factors of these phenomena.We find out that except natural environment,policy and economy and so on,land use is the main factor especially for urban land use and rural residential land use.
  • ARTICLES
    Comparison of the Sea Surface Temperature Anomalies Modes of the Northwest Pacific Ocean at Different Time Intervals
    CHEN Zhuoqi, SHAO Quanqin, YANG Haijun, ZHANG Shuai, YU Xu
    2007, 9(2): 31-36.
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    This paper analyzes the monthly and ten-day interval averages of the Northwest Pacific sea surface temperature anomalies data using empirical orthogonal function(EOF) to determine the sea surface temperature anomalies modes for these time intervals and to compare them.Finally,this paper uses the mathematical viewpoint to explain the sea surface temperature anomalies modes for the monthly and ten-day interval averages and why they have a negative correlation with temperal coefficient.
  • ARTICLES
    Research of WebGIS Based upon RIA
    ZHANG Hong, FENG Jiangfan, LV Guonian, TENG Xuewei
    2007, 9(2): 37-42.
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    Geographical Information Systems(GIS) are characterised by the ability to integrate geospatial data from a wide variety of sources.World Wide Web Geographical Information System(WebGIS) is the combination of Internet/Web technologies and Geographical Information System,it makes the Web publishing and sharing of geospatial information in the whole world possible and has exerted great influence on the national economic development and our everyday life.In the application of WebGIS,how to transfer efficiently the geospatial information,such as the user's spatial query submits and the result data from GIS database,through the network is a key factor to determine the capability of the system.This paper firstly analyses the problem existed in WebGIS,and then introduces the Rich Internet Applications,in short RIA,which is a brand-new Web application solution.Considering the trait of RIA,the thought for constructing WebGIS based on RIA is presented,and three key techniques adopted in RIA based WebGIS are summarized and analyzed.After that,this paper describes the framework of WebGIS based on RIA,consisting of five layers:client layer,presentation layer,business layer,integration layer and resource layer.In the design,the realization of client,server and protocol are discussed in detail.Finally,the thought given in this paper is proved feasible and effective with an experimental system,in addition,some future work in WebGIS based on RIA,such as security,interoperability are indicated and simply explored.The authors believe that with more research on WebGIS based on RIA,RIA will play greater role in publishing geospatial information,furthermore,the geospatial information web sharing will become easier.
  • ARTICLES
    Studies on Conceptual Framework,Content System and Applications Analysis of NetWork GIS
    ZHANG Shuliang, WU Yu, XU Jiehui, LV Guonian
    2007, 9(2): 43-48.
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    Contents of Web Geographic Information System research are,habitually,simplified as WebGIS or Internet/Intranet GIS by most researchers.In fact,there are many differences in data model,Web structure,function deployment between WebGIS and Internet/Intranet GIS.Therefore,if Web Geographic Information System is called by the name of WebGIS or Internet/Intranet GIS,there exist disadvantages in essence.On the basis of web and distributed calculation technology,this thesis achieves much restructure researches on conceptual framework,content system,applications analysis and existing problems of Web Geographic Information System in terms of broad sense and narrow sense,so as to promote Web Geographic Information System research.
  • ARTICLES
    A Study on Class-2 Population Regionalization and Its Application to Population Spatial Distribution Based on GIS:A Case of Shandong Province
    HUANG Yaohuan, YANG Xiaohuan, LIU Yesen
    2007, 9(2): 49-54.
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    The ways of regionalization affect the precision of population distribution based land-use and land-cover directly.In this paper,the authors made use of math-statistics to choose the factors to design the index of class-2 regionalization,and then did class-2 population regionalization using the technique of spatial analysis.Based on it,population distribution was modeled according to data of the rural residential area,city residential area and cultivated land area,and then distributed the statistic population of Shandong province in 2000 in aid of GIS.Eventually,the precisions of the population distribution data were compared between class-1 and class-2 regionalization in Tancheng county.The result of comparison indicated that the precision of population distribution based on class-2 regionalization was improved both in numerical and spatial aspects.
  • ARTICLES
    The Selection of Resettlement Sites Based on GIS——A Case of Liuku Power Station in Nujiang River
    LI Yimin, KONG Jun
    2007, 9(2): 55-59.
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    Yunnan Province is rich in hydroelectric resources and is an important hydroelectric base of China.Several major advantages of developing hydroelectricity,including very good overall benefits and lower developing costs,make hydroelectric development an obvious opportunity for promoting local socioeconomic development in Yunnan.However,because a lot of socioeconomic factors are involved in the building of power stations,there are many problems which need to be solved,among which the resettlement of the affected residents is one of the most difficult problems.Since resettlement will deeply affect the life of many people,it merits serious and in-depth consideration throughout development process.As the development of human becomes the primary value of the society,using scientific methods to select proper places to resettle the affected residents and make it possible for the residents to benefit from the hydroelectric development is becoming more and more important for the decision makers.Using the development of the Liuku Power Station as a case study,this paper explores the methods of using Geographic Information Systems to support the searching of resettlement sites.It demonstrates how spatial analysis methods,including overlay analysis,buffer analysis and network analysis,can be employed to evaluate locations and find the best locations for resettlement.Five major factors considered in the siting process include:1) transportation accessibility:close to the existing market town or major roads;2) good soil conditions and ample water resource for agriculture;3) areas with slope less than 25° for housing construction;4) better to be within the same county,for easier cultural adaptation;and 5) no conflicts with natural protection areas or National Key Construction projects.Analysis results are then presented and discussed.
  • ARTICLES
    Wetland Information Extraction Based on Decision Tree Model
    LI Hui, YU Ming
    2007, 9(2): 60-64,73.
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    Wetlands provide a range of environmental and socio-economic benefits,which range from their ability to store floodwater,improve water quality,provide habitats for wildlife and to support biodiversity and aesthetic values.The loss of wetlands,which was caused as a result of urbanization sprawl,and land cover change,has gained considerable attention now.The utilization of satellite remote sensing and GIS technology for wetland information extracting and dynamic monitoring has proven to be a useful application.The objective of this study was to find more efficient way to extract wetland information from remote sensing data.Decision tree models were designed and carried out for extracting wetland dynamic change information from TM/ETM+ image,which acquired on April 9,1988 and March 4,2001 respectively.And the results show that the precision is pretty high and satisfactory.
  • ARTICLES
    Analysis of the Slope Uncertainty Derived from DEMs
    LIU Min, TANG Gouan, WANG Chun, DANG Weiqing
    2007, 9(2): 65-69.
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    Slope is one of the crucial terrain variables in spatial analysis and land use planning.DEM based slope extracting method has been widely used in practice.However,the slope data uncertainty which is very important to the applications has always been neglected.This paper focuses on how resolution affects the uncertainty of the slope extracted from DEMs in Shaanxi Province.Taking 1∶50 000 DEM with a resolution of 25m with a total of 671 sheets of Shaanxi as source data.The research shows that the average slope reduction along with the DEM resolution assumes a conic trend,but when the DEM resolution reduces to a certain degree,the average slope would tend to be stable;and from the result of the comparison of the slopes derived from different resolutions,we can see that the slope uncertainty presents an obvious spatial constitutive distribution.
  • ARTICLES
    Dynamic Simulation of Urban Land-use Change of Fuzhou City Based on CA Model
    CHEN Zhiqiang, CHEN Jianfei
    2007, 9(2): 70-73,2.
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    Urban land-use change is a complex dynamic and spatio-temporal process and how to simulate this process is a key problem in the research field and Cellular Automata Model has obvious superiority.In this study,a TM image in 1988 and two ASTER images in 2001 and 2004 respectively of Fuzhou city were used to extract the urban land-use information of the research area and Cellular Automata Model was used to simulate the change of urban land-use in the following 20 years from 2001 and the precision was tested by the ASTER image in 2004.The result shows that urban land-use will expand at a speed of 7km2/y and the leading direction of development will be the Nantai island with rural urbanization as the other key factor,at the same time the urban green area will shrink.
  • ARTICLES
    A Study on the Classification of Watersheds in Fujian Province Based on DEM
    CHEN Jiabing, LI Huiguo, ZHENG Daxian, ZENG Congsheng
    2007, 9(2): 74-77,95.
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    Based on Digital Line Graphic(contour,scale:1/100 000) ,firstly,the authors produce DEM(Digital Elevation Model,30×30m ) of Fujian Province by GIS special interpolation technology under the environment of ARC/INFO software.Secondly,under the environment of hydrologic model of ARC/INFO software,through DEM pretreatment,flow direction analysis,flow accumulation analysis and watershed recognization,1 435 small watersheds are extracted.The result of the study shows:In the mountain area,the watershed boundary line is almost identical to the ridge line,but in the flat country,the result is less satisfactory because of DEM precision,devious coastline and bitty bay,the watershed boundary line needs revising artificially further.The fast extraction of the watersheds based on DEM saves manpower and material resources greatly,which is feasible according to efficiency and precision.With constant improvement of the precision of DEM,this method will lay solid foundation for the quick analysis of spatial combination characteristics of various physical geographic elements within the range of watersheds in the whole province,data management of observation stations synthetically,and the visual browse,inquiry,statistics and hydrology of model analysis,which will promote the implementation of eco-environment managements,such as eco-environmental protection,eco-environment con-struction,etc.
  • ARTICLES
    Study of Visual Geographic Modeling Framework for Virtual Geographic Environment
    TANG Wei, LV Guonian , WEN Yongning, TAO Hong
    2007, 9(2): 78-84.
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    Based on the conceptive model,a method of vision geographic modeling relevant to the virtual geographic environment was introduced.Utilized Object Oriented Programming,an extensible framework of vision geographic modeling was constructed.Moreover,the key techniques which were used to perform the visual geographic modeling were displayed as well.All these applications show that the framework is both extensible and adaptable,which not only supports the compound model constructed by the model components,but also benefits the realization of the geographic phenomenon,mechanisms and processes correctly.
  • ARTICLES
    Classification of the Comprehensive Informatic TuPu for the Region’s Eco-environment:A Case Study on Fujian Province
    CHEN Jing, LIAO Ke
    2007, 9(2): 85-90.
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    The classification of eco-environmental TuPu underpins the rational development and treatment of natural resources and the research of geo-information TuPu.Taking systematic analysis as its train of thought,this paper is designed to set up a classification system of comprehensive eco-environmental information TuPu,on the basis of the summary and contrast analysis of land use by the predecessors and the classification studies of land cover,vegetations,landforms,landscape and eco-environment etc.,in the light of methodology of geo-informatic TuPu and with the aid of the technique of RS and GIS.As the elements of basic geographical structure,landforms and wide range of temperature conditions are natural bases that can’t be changed on a large scale by mankind under present technical conditions.The regional disparities of these factors make different environment occupy a certain regional space.Thus,it’s imperial to first distinguish different environment districts and to consider,on the basis of which,the functions of nature and human elements in an all-round way.Namely,the comprehensive functions of water and heat factors determine the main categories of macro ecosystem such as forest,grassland,desert,etc.Human activities further check the advance directions of natural ecosystem.Therefore,the first-level classification is made according to the vegetations and land use conditions.The second one is made in line with eco-environmental problems caused by human beings and exploitation methods used by mankind.Finally,it comes up with the classification system of eco-environmental TuPu,taking Fujian Province as an example.
  • ARTICLES
    Key Topics on Information Integration of Digital Geomorphology in China
    LONG En, CHENG Weiming, LIU Haijiang, CHAI Huixia, LI Rui
    2007, 9(2): 91-95,135.
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    Geomorphology is one of the most important components of physiographic environment.Traditional geomorphologic mapping method mainly depends on handwork and field surveying;this mapping method needs enormous human work,and long mapping time.Therefore,this method does not satisfy the needs of information age.With the rapid development of RS and GIS,more and more geomorphologic mapping can be gotten and finished by means of Remote Sensing data indoor in a shorter period of time.This research summarizes the achievements of geomorphologic classification and mapping methodology,and puts forward the concept of digital geomorphology,including digitalization,updating,dynamic and systemic features,which can store all of the geomorphologic information,even update them.New geomorphologic classification system utilizes many layers and classification methodology,which can divide continental landform into seven layers,i.e.,altitude and undulating degree basic formation causes,sub-causes,morphology,sub-morphology,slope and aspect,and matter composition.And information integration can be divided into loose and tight ways.There are several characteristics of the digital geomorphology,including digitalization and quantification of all geomorphologic information,spatial analysis,dynamic features and geomorphologic system.Digital geomorphology can play important roles in agricultural production,environmental protection,construction of national defense,etc.
  • ARTICLES
    Construction and Analysis of Shaanxi Provincial Urban and Transportation TuPu
    LU Binying, CHEN Zhengjiang, YUAN Kansheng, WANG Haiyan
    2007, 9(2): 96-100.
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    The naissance of geo-information TuPu is accompained with geo-information knowledge innovation,and the construction of geo-information TuPu is a cognizing process of studying geo-science object.Based on construction and analysis of the Shaanxi urban and transportion informatic TuPu,this study points out that distribution law of Shanaxi urban grid is symmetric,and the distribution law of its transportation layout is line symmetric.The analysis of target shape TuPu of big cities centered around Yan'an in China suggests to develop Yan'an into a big city to drive economic development of northern Shaanxi.The conclusion is to formulate Shaanxi provincial urban and transportation scientific development programme with the guidance of urban and transportation informatic TuPu.
  • ARTICLES
    The Methods and Implement of Coordinates Conversion for Graphs
    ZHOU Wei, ZHANG Yanyan, LONG Yi
    2007, 9(2): 101-105.
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    Coordinates conversion for graphs is the basic problems for the development and application of CAD and GIS,as well as the most function for drawing export and construction of fundamental GIS and thematic GIS.It deals with unification of data standard,improvement of data share,and extension of data service.In this paper,the relative mathematical models and the methods of system implement is presented with the examples of CAD and GIS.
  • ARTICLES
    Remote Sensing Dynamic Monitoring on Changes of the Costal Zone in Longkou City During 1984～2004
    WU Quanyuan, HOU Zhihua, PANG Jiewu, JIANG Chunling, ZOU Min, YANG Shengjun
    2007, 9(2): 106-112.
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    The coastal zone is the belt influenced from land and ocean interactions,as well as human factors.So its evolution depends not only on natural factors but also on human socio-economic activities.It has very good instructive meaning to provide timely accurate coastal zone changes information for exploiting and protecting the coast and studying its ecological footprint.Using 12 periods remote sensing images covering 20 years from 1984 to 2004 of Longkou city,this paper extracted the coastline,the high tidal line and the low tidal line from different years utilizing different methods and techniques of data image processing and visual interpretation based on the characteristic of each RS image and checked up the extracted tide information with the tide data from two tide monitoring stations.On the basis of contrasting with the base line,the paper analyzed the law of the costal zone changes in both spatial and temporal aspects,and then discussed the major influential factor to the changes by analyzing natural and artificial factors.The results indicated that in addition to the artificial seashore,the general trend of the coastal zone evolution in the 20 years was moving to sea during the former 10 years and moving to land during the latter 10 years,and the changing extent was on the increase year after year.The protection against the tide came down by reason of the bank turning narrow and low,the tideland turning broad,and the gradient turning gentle.It was clear that human activity had great impacts directly and indirectly on the costal zone evolution.The most fundamental activities included infrastructure construction in the nearshore zone,the adjustment of the agricultural structure,and the unordered development of the sand dredging industry.The natural factors had been also found affecting the evolution of the zone,such as shore cutting and deposition,sea-water intrusion,etc.
  • ARTICLES
    The Application of DMC Data to the Land Use Change Dynamic Monitoring——Taking Daxing District of Beijing as an Example
    MU Fengyun, ZHANG Zengxiang, WANG Changyou, LIU Bin
    2007, 9(2): 113-117,135.
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    Urban land use change is one of the most significant expressions of land use and land cover change(LUCC).Urban expansion is the major form of industrialization and urbanization.Disaster Monitoring Constellation(DMC) is an international small satellite organization composed of seven countries.The data resolution it received is 32m.DMC can supply images of any place in the world and update the data fleetly by passing by the same place fluently each day.This paper based on DMC data and Landsat TM images,analyzed the structural features and spatial patterns of land use change in Beijing in the past 20 years.These TM images and DMC data were geo-referenced and orthorectified,using field-collected ground control points.A hierarchical classification system of 25 land-cover classes was applied to the data under the support of Intergraph MGE(Modular GIS Environment).The interpretation method of TM images and DMC data adopted is manual interpretation,which is intensive and time consuming but can ensure high classification accuracy.Finally,based on the above data,the effect of DMC data in land use classification and change detection is evaluated such as the classification accuracy and the spatial veracity.
  • ARTICLES
    Satellite Remote Sensing and Dynamic Variation of Urban Land Use Changes——Taking Chengdu City as an Example
    HUANG Chengyi, DENG Liangji, FANG Conggang,
    2007, 9(2): 118-123.
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    Based on the RS and GIS methods,we analyze the land use information from 1996 and 2002 TM images,then from both spatial and temporal aspects,we analyze the situation of land use change in the study area.The results are shown as follows:1) The land use structure changed greatly in Chengdu city during 1996 to 2002.The areas of cultivated land and un-used land have been decreasing.The areas of forestland and land for housing and other construction purposes have been increasing.2)During this period of time,the inter-transitions between different types of land use are very complex,mainly occurring among cultivated land,forestland,land for housing and other construction purposes and un-used land.3)At same time,the inter-transitions between different types of land use vary in different parts of the city.Meanwhile,the inter-transitions between the same types of land use also vary in different parts of the city.
  • ARTICLES
    Dynamic Change of Land Use in the Aksu Drainage Basin
    MIAO Lizhi, JIANG Yan, LV Guonian, LIANG Shaohui
    2007, 9(2): 124-128.
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    Supported by spatial analysis method of geographic information system(GIS)and statistical method,land use data of 1990 and 2000 in the Aksu Drainage Basin were analyzed.The quantitative and spatial characters of land use change during 1990～2000 in the Aksu Drainage Basin were studied and the main types and the features of the range and speed of various types of land use change in quantity and its spatial variation were revealed.This paper may suggest related governments to construct the infrastructures to economize water resource and improve the environment in the Aksu Drainage Basin.
  • ARTICLES
    Study on the Methods of Extracting Urban Land Use Information Based on Landsat ETM+ Image
    PAN Weihua, ZHANG Chungui, CHEN Jiajin, LIN Jing
    2007, 9(2): 129-133.
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    How to extract exactly urban information is always very important in the application of remote sensing.There are different methods of extracting urban land use information based on Landsat image,such as Normalized Difference Built-up Index(NDBI),Spectrum Threshold Extraction,Supervised Classification by computer and interactive visual interpretation;however,each of them has its own advantages and disadvantages in specific application.The main objective of this paper is to compare the efficiencies and accuracies between the multiple methods,and ameliorate these methods to improve their efficiency.In this study,we take Quanzhou city as study area,and utilize Landsat ETM+ image received in 2000 to extract the urban land-use information using the above-mentioned multiple methods respectively.By com-parison,the study result reveals that these ameliorated methods can work better than before,NDBI can extract information easily and quickly,and Spectrum Threshold Extraction can acquire high accuracy at the cost of complexity.