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  • 2001 Volume 3 Issue 4
    Published: 25 December 2001
      
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  • ARTICLES
    Geo-Information Science in the Age of Digital Earth
    Zhang Hongyan, Wang Qinmin, Zhou Chenghu, Li Huiguo
    2001, 3(4): 1-4.
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    The meaning and characters of digital earth were briefly generalized and the transformation from Geo Information System to Geo Information Science was analyzed. The main content of Geo Information Science was generalized. Some key problems for founding Geo Information Science were put forward, which were spatial database and the description of geographical phenomenon.
  • ARTICLES
    The Difficulty and Strategic Study of Continued Development in Guizhou
    Xiao Jinyuan
    2001, 3(4): 7-11.
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    In this article there is a systematic analysis the difficulties on 'Big Development'.The paper put forward some countermeasures and suggestions.
  • ARTICLES
    New Progress in the Application of Satellite Thermalinfrared Imagery to Earthquake Prediction
    Xu Haomin, Wang Yu, Tang Fangtou, Chen Meihua
    2001, 3(4): 12-18.
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    The concept of stochastic resonance (SR) has been applied into the analysis of satellite thermal infrared images. Six kinds of anomalous phenomena related to crustal movement were recognized in satellite thermal infrared images. Six diagnostic indicators for the prediction of magnitude above 6.0 global earthquakes and their quantitative evaluation standards have been established. The microscopic behavior of global crustal movement is successfully controlled by using satellite thermal infrared imagery, and the occurrence time and magnitude of over 80% of global strong earthquakes occurred since the foundation of the observation station have been successfully predicted. It is believed that the combination of satellite thermal infrared information with macroscopic anomalous phenomena will play an important role in earthquake hazard reduction.
  • ARTICLES
    Effects of Temperature Variation on Soil Water Movement and Water Exchange between Soil Water and Phreatic Water
    Xia Ziqiang
    2001, 3(4): 19-24.
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    The daily and yarly periodic variation regularities of soil temperature and characteristics of soil temperature gradient variation have been studied in this paper ,the relationship between soil water movement as well as the exchange regularity of soil water with phreatic water and soil temperature varition has also been ana lyzed . From experiments and analysis show that the daily periodic variation of tem perature is one of the main reasons causing the daily periodic variation of phreatic water table.
  • ARTICLES
    Area Interpolation and Its Application in GIS
    Lu Anmin, Li Chengming, Lin Zongjian
    2001, 3(4): 25-29.
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    In economic , social and urban studies, areal units under analysis frequently differ from areal units over which data are compiled. Most area based analyses, hence, face an unavoidable problem of transferring data across different zonal systems. This paper analyzes areal interpolation using ancillary data EM method and points out how to realize it in GIS. The characteristics of EM method are discussed. At last, the prospects of areal interpolation using ancillary data is elaborated as well.
  • ARTICLES
    A Study on Integrated Model of Urban Ecological Carrying Capacity
    Yue Tianxiang
    2001, 3(4): 30-33.
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    This paper analyses connotation of the integrated model for urbanization in terms of the situation of urbanization in China and requirement to information integration in the new information age. On the basis of studying effects of urbanization on ecosystems, a system of huge data based sub models is proposed and major characteristics of the integrated model is described under the modern information technology.
  • ARTICLES
    Application of "3S" Technology in Wenchuan Cultivation into Tree Planting of the Minjiang Upper Valley
    Wang Yang, Yang Wunian, Yuan Peixin
    2001, 3(4): 37-41.
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    The combination of Remote Sensing(RS), Global Position System(GPS), Graphical Information System(GIS),which are characteristic of celerity, precision and dynamic, can find the eco enviromental condition of the research area, and develop the eco environmental base survey database with high precision, which available the scientific direction for the government's macro decision making and layout.The paper ,as an example of the assumed project of "the Synthetic Survey and Evaluation of Eco environment with Remote Sensing in Minjiang Middle and Upper Valley" of National Theme 863 308,"the Golden Eye Action", discusses that the application of utilizing the "3S" technology(RS?GPS and GIS)to instruct setting down the policy of Changing Cultivation into Tree Planting and monitoring the eco environment. The precision of calculating surface area can meet the demand of 2 rank resources survey of our country.
  • ARTICLES
    Vegetation Coverage Changes Research in East Maowusu Sand Area
    Lu Zhongzheng, Zhang Guangchao, Gao Huijun, Qiu Shaopeng
    2001, 3(4): 42-44.
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    Vegetation coverage information in East Maowusu sand area were extracted and calculated by using TM imagery received in 1987 and 1998. The changes of vegetation coverage in past 11 years were obtained. The paper evaluated the effect of sand control in recent years and demonstrated the relationship between coal mine exploitation and vegetation recovery.
  • ARTICLES
    Remote Sensing Based Engineering Geological Term in TongXin-GuYuan Highway of NingXia
    Niu Baoru
    2001, 3(4): 45-47.
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    The paper mainly discusses the particalarity soil and badness geogical in TongXin GuYuan highway of NingXia in term of the principle of the Remote Sensing,indicate it'sendanger for particalarity soil and badness geogical.
  • ARTICLES
    Social-economy Benefit of Remote Sensing Technology in calamity Investigation --Taking the investigation of flood and geological calamity by remote sensing in Mentougou District of Beijing as a example
    Zhuo Baoxi
    2001, 3(4): 48-52.
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    The Paper recounts the investigation of flood and debris flow calamities by remote sensing technology in Mentougou District,southwest Beijing. This work has msde a grest role in against the natural calamities in the flood seasons these years,and has achieved a notable social-economy benefits. Judgements are raised for the main types of calamities and their harmfulness,meanwhile,villages and towns of the district are divided into four categories acording to the potential disaster conditions.The prevention and control proposals are put forward for all of the four categories of villages and small towns.Finaly,the potential factors related to the calamities are analysed,and the control measures are advanced.
  • ARTICLES
    Data Quality Control in the Product Flow of Digital Map
    Gao Xiaomei
    2001, 3(4): 53-56.
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    Under the ISO9001 quality control system the discussion of this paper is emphasized on the setting and control of the data file because they will bring great influences on the mapping quality in the product flow of digital map. Furthermore, the quality control content and method for standardization and programming production of digital map are discussed in the electronic publishing system and CTP system.
  • ARTICLES
    The Design and Application of Multimedia Electronic Map Based on Electronic Publishing System
    Gao Xiaomei
    2001, 3(4): 57-60.
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    In this paper mainly discusses the realization method and the design content of Multimedia Electronic Map ,which design with multimedia software and use digital map as the key date source from Electronic Publishing System.
  • ARTICLES
    Universal Numerical Conversion on Map Projection
    Li Guojian, Hu Peng
    2001, 3(4): 61-65.
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    This paper proposes a quickly universal conversion method based on the differential correction of double affine transformation for projections between the diverse projection plans. It shows its principle, demonstrates its correctness, and gives its coverage and skills for fast computing. The method is very suitable for the projection transformation on different DRG.
  • ARTICLES
    Study on TM Image Shadow Elimination by Sunlit and Shadow Normalization
    Meng Chunlin, Yu Qingguo, Hua Chaolang, Zhang Zhi, Deng Xiqing
    2001, 3(4): 66-70.
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    The quantity of the EM energy that reflected from the ground decided the quality of the satellite image of passive remote sensing. And the reflection of the ground has close relation with its topography. The more complex of the topography the more shadowy there are in the satellite image. The topography of Caiynaghe Nature Reserve of Yunnan is very complex and there are more than 10% shadows in the TM image. It limited the applying and developing of RS technology in Yunnan province. We tried the sunlit and shadow normalization to eliminate shadows caused by topography. It turned out quite good in imagine enhancement of Caiyanghe Nature Reserve and later applying in Wuliangshan Nature Reserve.
  • ARTICLES
    The Research of Method about Plant Biochemical Concentration Determination with Hyperspectral Data
    Zhang Fengli, Wan Yuqing
    2001, 3(4): 71-75.
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    Hyperspectral data contain plenty of information about space, radiation and spectrum, which makes it feasible to quantificationally analyze the chemical concentration of earth surface. Studying the spectral characteristics of main biochemical components of plants with hyperspectral data, we can determine the concentration of various componets by use of certain algorithm. In this way we can at last supervise the growing status of plants. In this paper, stepwise multiple linear regression and spectrum derivative techniques are introduced to calculate the concentration of nitrogen, lignin and cellulose in plant.