最新刊期
卷 ， 期 3 ， 1992
- 摘要：K-T transformation’s forestry significance is discussed in this paper. The idea of the transformation can be applied to the forestry analysis. On the K-T feature space, the forestry significance is obvious and the forest is of higher greeness, wettness and lower brightness. And it occupies relative fixed place. By this specific property, forest and its environment characteristic can be described with their reflective spectrum.In this paper, remotely semsed estimate model of stand volume is developed with K-T transformation’s features in Linan county, Zhcjiang province. It includes forest and environment characteristic, and is of physical meaning. The model is demonstrated satisfactorily by the experiments. The average estimate precise of stand volume is 90% for the primary stand classes, It can be applied to the South-China mountain.
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发布时间：2021-06-10 - 摘要：Aero-photographs were used in land Resource monitoring of Sanchuan River Valley in western Shanxi Province. To apply group sampling method and aided by information system for statistical calculation and ancillary mapping, the dynamic changes of land resources during the past 23 years were revealed. The water and soil conservation measures were also evaluated in the survey.
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发布时间：2021-06-10 - 摘要：The paper gives a simple introduction to he foundamental techniques and methods for the enhancement of composite image, which consists of physical and chemical exploration and geological information. Detailed description has been given individually to the abnormal colours, lineament and circular structure and image features on the multi-geographycal information composite image. We have studied the ore control effect of circular and lineament structure to the multimetal ore, and come to the point that the Xianghualing region is a complex ore control area by circular and lineament structure.Therefore, we build a remote sensing imag model for ore field in the region. Within the circular structure, the northwest lineament crosses the northweast lineament and forms frames that control the metal ore distribution. According to the features of the found deposits and their coherent image, we conclude that there are two symbols for ore looking. The first symbol is the close lineament feature on the image, the second is the circular structure crossing lineament feature on the image. These two symbols are of he significance of indication for ore looking in the granite growing areas in the south of Hunan province. At the end of this paper, two areas expecting to have ore have been determined according to the comprehensive analysis of multi informations, which have grown great effects.
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发布时间：2021-06-10 - 摘要：Remote Sensing is superior in landslide and debris flow recognition to the conventional method, it yet can gain data and maps of the distribution, scope, type, growing environment etc of landslide and debris flow efficiently in a large scope of area. Through the interpretation of multi-temporal and multi-platform remote sensing images the dynamic characters and developing tendency of landslide and debris flow can also be grasped. Therefore remote sensing can provide overall and reliable basis for landslide and debris flow assesment and prevention.Despite of these great successes, the application of remote sensing in the field of landslide and debris flow in China is still in a primary stage, and there is great potentialities be brought in to play.Apart from the technology of remote sensing itself, the advance of the application level is depend on the study of the mechanism and applying model of landslide and debris flow, and on the support of the disaster information system.
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发布时间：2021-06-10 - 摘要：The integration method of urban extension monitoring has been developed by using different period and multiplatform remotely sensed data in this paper. The better effect was obtained by using the integration method of classified images in the study of the rapidly developed Yueyang test area. In terms of urban information extraction of remote sensing image, various weight coefficient masks were designed to extract the relevant frequency vector as the urban contextual information. After progressively processing the urban image by using the contextual information, the final accuracy of classification is better than 91.7%. The test shows that the integration method of classified images is not only a flexible and practical method, but also a effective means to fully utilize the information sources of existed remotely sensed data.
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发布时间：2021-06-10 - 摘要：A hierarchical fuzzy clustering algorithm is presented in this paper. As CFCM algorithm provides good classification resolution but the selecting of initial vectors is of great difficulty and blindness. At the first step, an improved SFCM algorithm is adopted for coarse segmentation and its result serves as initial vector for the fine segmentation by CFCM at the second step. Applying this algorithm to snow recognition shows it can yield very satisfying performance in partition resolution while does not reduce computation speed due to a reasonable initial vector.
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发布时间：2021-06-10 - 摘要：Quadtrees, the data structure developed in recent years, have advantages in expressing structure and compressing the space of storage while Chaincode-Vector are the data structure used to detect and describe the edges and shapes of fields in an image, so both of them have their own advantages and disadvantages in different situations. This paper advances and analyses an algorithm of converting 2DRE Quadtree to Vector, which abstracts the edges of fields in an image from its 2DRE Quadtree. The fields’ edges are represented in the form of coordinates of vectors for displaying the fields’ shape and outputting the vectors easily. In this paper,the base of the algorithm is introduced first; then the algorithm is described in detail; finally the features and practical results of the algorithm are estimated and analysed.
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发布时间：2021-06-10 - 摘要：The Fourier waveform analysis algorithm is applied to the computer processing of spectral reflectance data. The spectra for different landcovers are decomposed into wave components of different orders, which have definite features and bear useful information contents. The amplitude and phase of each wave component solely determine its contribution to the overall waveform of spectra. The study reveals that the Fourier waveform analysis algorithm is capable of processing the hyperspectral image data acquired by imaging spectrometers such as AIS andAVIRIS.
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发布时间：2021-06-10 - 摘要：According to the theory analysis, mathematical mode showing the lineal relationship between the response of airborne scanner and the effective reflected brightness of targets has been established under the reasonable assumption, exact physical significance for related parameters is given.The measuring method of absolute parameters i.e. solar reflected radiance distribution function on the ground, has been solved under the condition of the field measurement, and it makes the sychronous measurement become practible.Based on the airborne and field data obtained in Gold-Sea Lake, Gaoyaing and Anxing counties, 59 regressive equations were obtained by regressive analysis at different area, temporal, height and detective angles.t test and r test show that the correlations are obvious or quite obvious. The correlative coefficient are almost larger than 0.98, the remainder are not smaller tthan 0.93, various factors influence on the regressive coefficient, the formation of the reflected brightness image and band reflectance image have been researched.
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发布时间：2021-06-10 - 摘要：The principle of attitude determination with 3DF GPS receiver are discussed. It consists -of fundamental Architecture, the basic principle of attitude determination, error quelle and accuracy analyse. The preliminary results show, the accuracy of attitude determination is about 0.02°-0.05°.
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发布时间：2021-06-10
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