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  • Table of Content
       , Volume 13 Issue 3 Previous Issue    Next Issue
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    Review
    A STUDY ON THE DEVELOPMENT OF NEW CLASSIFICATION TECHNOLOGY FOR REDAR REMOTE SENSING IMAGERY
    TAN Qu-lin, SHAO Yun
    REMOTE SENSING FOR LAND & RESOURCES. 2001, 13 (3): 1-7.   DOI: 10.6046/gtzyyg.2001.03.01
    Abstract   HTML   PDF (480KB) ( 917 )

    With more and more information acquired by radar remote sensing the classification technology for radar imagery is heading towards high precision, high correctness and rapidness due to the application of new algorithms, theories, ancillary information and characteristics. In the paper, the development of new classification technology for radar imagery is overviewed. To improve the precision and stability, the authors consider that new characteristics (polarimetric and interferometric information, multi_temporal and geographic information etc.), new theories (like wavelet, fractal and fuzzy theory etc.), and new designed algorithms (such as improved max_likelihood, context Classifier and neural network classifier etc.) should be applied to the classification process of radar imagery.

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    Technology Application
    SYNOPTIC ANALYSIS ON THE SAND-DUST STORM IN SPRING, 2001
    WU Xiao-jing, LU Jun-tian, ZHANG Xiao-hu, ZHENG Xin-jiang, SUN Jia-min
    REMOTE SENSING FOR LAND & RESOURCES. 2001, 13 (3): 8-10,24,67,68.   DOI: 10.6046/gtzyyg.2001.03.02
    Abstract   HTML   PDF (1189KB) ( 846 )

    The image characteristics of the sand_dust storm processies monitored by meteorological satellite are described, and different synoptic systematic models for the formation of sand_dust storm are analyzed. In addition, a preliminary study is made on the climatic reasons for the repeated occurrence of sand_dust storm in 2001.

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    APPLICATION OF REMOTE SENSING TECHNOLOGY IN THE COAL BED GAS EXPLORATION IN SOUTH-EAST OF ORDOS BASIN
    YU Hua-qi, QI Xiao-ping
    REMOTE SENSING FOR LAND & RESOURCES. 2001, 13 (3): 11-14,69.   DOI: 10.6046/gtzyyg.2001.03.03
    Abstract   HTML   PDF (1018KB) ( 778 )

    Based on the practical demands for coal bed gas exploration in the loess highlands of the Ordos Basin, the authors, by interpreting the remote sensing images in the study area and utilizing the Statistics and Analysis of Fracture Density method, have predicted the high permeation belt of the coal bed gas in the study area, and made a preliminary evaluation on the favorable sectors for coal bed gas exploration. The result has provided important references for the coal bed gas in the oil field.

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    ANALYSE TO SPECTRAL CHARACTER OF THE VEGETATION ALONG YANHE RIVER
    WAN Yu-qing, YAN Yong-zhong, ZHANG Feng-li
    REMOTE SENSING FOR LAND & RESOURCES. 2001, 13 (3): 15-20.   DOI: 10.6046/gtzyyg.2001.03.04
    Abstract   HTML   PDF (419KB) ( 894 )

    This paper introducs the spectral character of main vegetations along Yanhe river, which are determined by the contents of many materials within vegetations, such as chlorophyll, carotenoids, nitrogen, lignin and cellulose. The spectra are also affected by many factors, like Leaf Area Index, sun's position, atmosphere condition, background character, observation geometry and growthing period of vegetations.

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    IMAGE CHARACTERISTICS OF ROCK-SOIL GROUND AND GEOLOGICAL DANGER AREA IN KUISAI HIGHWAY
    LU Guan-xiang, ZHOU Din-wu, TENG Zhi-hong
    REMOTE SENSING FOR LAND & RESOURCES. 2001, 13 (3): 21-24.   DOI: 10.6046/gtzyyg.2001.03.05
    Abstract   HTML   PDF (241KB) ( 776 )

    Based on the interpretation of color-infrared aerial photographs and field investigation, this paper has summarized various image characteristics of rock-soil ground and geological danger areas along Kuisal Highway. This can deliver new reference materials for remote sensing investigation in the exploring of westpart of our country.

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    APPLICATION OF REMOTE SENSING TO THE SURVEY OF WETLAND RESOURCE IN SHANGHAI
    FANG Quan-xing, SUN Zhen-hua
    REMOTE SENSING FOR LAND & RESOURCES. 2001, 13 (3): 25-29,40.   DOI: 10.6046/gtzyyg.2001.03.06
    Abstract   HTML   PDF (366KB) ( 698 )

    Remote sensing was used to investigate types, distributions and areas of the wetland in Shinghai. As a result, the distribution and zoning of vegetable communities in wetland, the micromorphologic units, the habitats of rare birds and the benthons were identified. Using the time characteristic of remote sensing images, the authors also studied ecological capacity of rare birds in the natural reserve, and revised the base maps.

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    Technology and Methodology
    COMPARISON OF SUBSTITUTING THE DIFFERENT PRINCIPLE COMPONENT IN THE FUSION OF TM AND SAR IMAGE PRINCIPLE COMPONENT CHANGE
    YANG Cun-jian, XU Jun, ZHANG Zeng-xiang
    REMOTE SENSING FOR LAND & RESOURCES. 2001, 13 (3): 30-35.   DOI: 10.6046/gtzyyg.2001.03.07
    Abstract   HTML   PDF (337KB) ( 831 )
    Principal component analysis(PCA) is one of the commonly_used methods to fuse Multisensor image data. Its procedure is to replace the first component with the high_resolution image, then to get the fused image by reversing PCA transform. Nevertheless, the first component contains more information than other components, and there will be much information lost if it is replaced. In this paper,TM2,TM3,TM4,TM5 and TM7 were analyzed by principle component transform, Radarsat SAR was used to replace the first, second, third, forth and fifth component of PCA respectively. Five different results were acquired by reversing PCA transform. The standard deviation and information entropy of five images were applied to analyze the fusion effect. The result shows that the fused images by replacing the fourth and fifth component contain more information than that by replacing the first component and can raise the separability between different types or classifications. But the difference between the fused images by replacing the fourth and the fifth component is not remarkable.
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    STUDY ON THE EARTH CORRECTION OF TM AND THE MOSAIC METHOD
    CAO Tong, HU Wei-Min
    REMOTE SENSING FOR LAND & RESOURCES. 2001, 13 (3): 36-40.   DOI: 10.6046/gtzyyg.2001.03.08
    Abstract   HTML   PDF (261KB) ( 720 )
    Earth Correction and Image Mosaic are the basis of using TM image to monitoring resource and environment. The accuracy of registration is the key factor for the follow_up work. The traditional method, which selects control-points to set up equation, tends to take long time and result in geometric distortion. This paper puts forward a rapid and practical method based on the high internal geometric accuracy of TM image. Tests show that the method is characterized by high speed and high registration accuracy.
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    EXPLOITATION AND UTILIZATION PLANNING OF LONG KOU GROUNDWATER WITH SUPPORT OF RS AND GIS TECHNIQUE
    WU Quan-yuan, HOU Wei, AN Guo-qiang
    REMOTE SENSING FOR LAND & RESOURCES. 2001, 13 (3): 41-46.   DOI: 10.6046/gtzyyg.2001.03.09
    Abstract   HTML   PDF (346KB) ( 833 )
    As new technologies, Remote Sensing (RS) and Geography Information System (GIS) can offer support for exploitation and utilization of groundwater either independently or interdependently. Through the analysis of groundwater database and model base, the information of space-time distribution of groundwater can be obtained rapidly and accurately. In this paper, the technique of the exploitation and utilization planning of groundwater is described.
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    GIS
    DESIGNING AND IMPLEMENTATION OF BASIC GIS FOR THE NANSHA ISLANDS
    GUO Da-hai, HE Zheng-min, LI Jian-cun, WANG Yi, HE Yu-hua
    REMOTE SENSING FOR LAND & RESOURCES. 2001, 13 (3): 47-53,68.   DOI: 10.6046/gtzyyg.2001.03.10
    Abstract   HTML   PDF (1134KB) ( 788 )

    Based on the data from remote sensing investigation on islands and water depth as well as from aero_magnetic survey, basic GIS for the Nansha Islands (NsbGIS) is formed by using computer, GIS, database and webGIS technology. NsbGIS is a professional information system for providing comprehensive and actual data as well as decision_making basis for marine planning, environmental protection, natural resources development, boundary negotiation, regional cooperation and sustainable marine development. This paper focuses on introducing the establishment of database of NsbGIS and the development of its function. In addition, some cases are given in the paper.

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    ESTABLISHMENT OF SPATIAL DATABASE FOR ESTIMATING REGIONAL STABILITY OF HUBEI PROVINCE BASED ON ARC/INFO
    LIU Chun-guo, XUE Chong-sheng
    REMOTE SENSING FOR LAND & RESOURCES. 2001, 13 (3): 54-58.   DOI: 10.6046/gtzyyg.2001.03.11
    Abstract   HTML   PDF (302KB) ( 799 )

    Being a database management system, GIS can manage to capture, store, and analyze processes and display spatial data. Therefore, it is a very powerful tool for studying spatial objects. This paper describes the establishment of spatial database system for estimating regional stability of Hubei province by using GIS software Arc/Info and on the basis of available geo_data and remote sensing data, which constitute an important source to capture and updata data in the spatial database system. The content, function, application and significance of establishing the spatial database system are also discussed.

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