The remote sensing exploration model is characterized by the systematic arrangement of the essential remote sensing features of a group of similar mineral deposits. These features are such attributes or properties of that group of deposits as geological setting, wall-rock alteration and ore-control tectonics. This paper points out that the study of remote sensing exploration model must include prospecting criteria of ore deposit formation, wall-rock alteration and ore deposit reformation.

The 13 July 2003 Qianjiangping Landslide in Zi-Gui Shaxisha Town caused serious disasters: in addition to the death of 10 local people, 14 were missing and more were wounded, together with heavy economic losses. By using men-PCinterpretation of air image taken on March 28, 2003, just before the water storage of the Three Gorge Reservoir to the elevation of 135m, combined with site verification, the authors obtained the data on elements, sizes and geological environments of new and old Qianjiangping landslides. It is held that the 13 July 2003 Qianjiangping Landslide is the revival of most old Qianjiangping landslides, and that the 13 July 2003 Qianjiangping Landslide has now on the whole become stable but the adjustment activity of various parts is still going on. The eastern old sliding body has suffered strong shearing stress, which will cause continuous dragging, slipping and collapsing in near future.

This paper has described the quantitative relationship between reflectance of water and its soil content. The soils are of several main kinds collected along the Yanhe River. With hyperspectral remote sensing technology, it seems possible to detect soil content in moving water and sea water. It is detected that the content of all sorts of soils in water and the water reflectance have a good line regression relationship in the ranges of 1550-1850 nm and 1350-1380 nm. Tests also show that the water reflectance between 368 nm and 831 nm can effectively demonstrate the water depth. Based on field survey and sample analysis, it is held that, instead of having a close relationship with the original reflectance of a signal band, the pollution content of water is related to the reflectance ratio of two certain bands, which might be determined by the characteristics of the pollutant and the degree of water pollution. With the Luhe River in Jingbian County as an example, this paper has studied the possibility of using hyperspectral remote sensing to detect the degree of pollution. The water spectra can not only reflect the relative pollution degree but also determine the type of water pollution.

Using ETMof Landsat-7 and SARimage of Radarsat1 satellite and based on various means such as the principal component analysis, the fusing processing of ETMand SARimages and the ratio of the mixed wavebands, the authors extracted the water content information from shallow soils in areas around the Tarim basin. In the image, the high water content area, the intermediate water content area, the low water content area and the water-bearing sector under the Quaternary aeolian bed show different color tone characteristics. Field verification has led to the delineation of new water-bearing sectors and demonstrated obvious effect of information extraction.

Based on an interpretation of TMimages assisted by the aerial photograph and field verification,this paper has studied Quaternary volcanic groups in the forest area of Oroqen Banner, Inner Mongolia, redivided Gankui and Noumin-Bilahe volcanic groups, recognized volcanic rocks and determined their eruption types as well as eruption ages,thus obtaining satisfactory results.

In this paper, the geometric positioning accuracy, the significant range of reversed water depth and the sensitivity of multi-spectral, satellite altimeter and imaging radar data were analyzed. The reversion accuracy of water depth and identity of the data were emphatically studied to determine the principle of the integrated map compilation of water depth on the basis of TM, SPOTand SARdata. The weighted average data merging technique was used to establish a method for compiling ideal integrated maps.

This paper presents some 200 km coastal land-sat pictures of Liaoning-Hebei and Hebei-Tianjin border areas. By means of remote sensing image processing, the coastal evolution and its characteristics are discussed.

With characteristics of "synthesis, multi-band and rapid message updating", TM Image has been regarded as a most important technology in the study of resources and environments. Based on an analysis of characteristics of the ecological greenbelt, this paper deals with the ecological greenbelt pattern of such cities as Guangzhou. Studies show that the analytical method based on TMimage can depict the basic characteristics of the ecological greenbelt pattern. It is revealed that the greenbelt coefficient of Guangzhou City is very high but the pattern is not balanced. Some suggestions are made with a view to improving the ecological greenbelt of Guangzhou City.

With the characteristics of edge partial correlation in mind, the authors put forward in this paper a new edge evaluation method. This method needs no standard edge diagram, and can directly figure out number of total edge points (A), number of 4-connection components (B) and number of 8-connection components (C) as well as their ratios (C/Aand C/B) relative to the edge diagram, thus making an integrated evaluation. With strong practical applicability, this method has some referential significance.

This paper proposes a new mathematical model for defining the matching support, which can remarkably improve the stability of matching. First, the interesting points are extracted by Harris algorithm, and the candidate matches can be found through correlation. Then the matching support can be calculated according to length distortion, direction distortion, gray distortion, and double faces constraint. Finally, relaxation is used to eliminate ambiguity of the matches. The experiment proves that, with this algorithm, we can establish relatively robust results characterized by one-to-one correspondence.

The texture is one of the important features of remote sensing images. In this paper, the image texture was extracted from Landsat TMdata by means of semivariogram of logarithms, one of the geostatistic functions, and added to multispectral lithological classification. Different window sizes were used to extract textural information. The results of image classification show that the classification based on spectral data and geostatistical textural information can produce much higher overall accuracy than that based merely on spectral data. Moreover, for lithological discrimination based on multispectral data, the larger the window size for texture extraction is, the more accurate the classification result will become. In practice, however, other factors, such as the boundary effect and the accuracy of some important lithological units, need to be considered in choosing an appropriate window size.

Altered rock information extraction is one of the important topics in the remote sensing exploration. This paper has proposed a functional technological process, which includes data preparation, information enhancement, thresholding and mapping. On the basis of a study of such means as principal component analysis, band ratio, spectral angle method, this process can surely play an effective role in the prospecting work within important metallogenic belts of western China. Some major problems in current work of this aspect are also discussed.

This paper has described in detail the working process, the digital analysis of ore-controlling factors and the construction of a remote sensing ore prospecting model for integrated remote sensing prognosis of mineral resources. In addition, the establishment and application of a comprehensive remote sensing analytical and evaluating system for mineral resources are also discussed. The integrated remote sensing prognostic work carried out in central Jinshajiang-Lancangjiang-Nujiang area of southwestern China indicates that, with the integrated remote sensing prognostic technique, the field ore prospecting work can be done with clearer foreseeability and teleonomy, and hence the working period of mineral investigation can be greatly reduced.

The estimation of the leaf area index (LAI) based on remotely sensed data is systematically reviewed in this paper. There are two major means: the statistical modeling technique and the optical modeling technique. This paper deals with the principles and development of these two methods. Their merits and shortcomings as well as their development trends are also discussed.

In the level-0 image, severe radiate distortions often occur due to the influence of such factors as the imaging methods themselves, photographic instruments and photographic conditions. These distortions find expression in phenomena like obvious differences in brightness, uneven brightness between the joining part and other areas, and apparent stripes. This paper puts forward the radiation correction method for eliminating these defects by applying CBERS-1 CCDcamera data. The method is very effective and the correction result is satisfactory.

Geospatial metadata is a main means to share information under the heterogeneous environment. Unfortunately, most GISapplications define metadata differently, each using its own programming structure, syntax and semantics to model the metadata. These incompatibilities make it difficult for an application to discover and interchange data maintained by another application. Aiming at solving this problem, the authors have studied the sharing-oriented framework of geospatial metadata management. First, the existing problems of metadata sharing in China are analyzed, then two strategies for metadata sharing, i.e., Metadata repository and Metadata interchange, are put forward, and finally a framework for metadata sharing based on MOFand XMIis designed.