Using remote sensing technique to the field of the City investigation on land and resources, ecologic environment and build planning is very necessary to adapt to the fast development of morden cities. By the end of Dec.1995, Chongqing has finished the remote sensing comprehensive study work. The data, image, picture and reports from the investigation are very important to the City development and harness of land and resources and the City management. It’s also useful to laying down the build planning. In this paper, the authors take Chongqing as an example, introduces the function of remote sensing technique and its application effect, in order to make this technique to be applied in wide field.
This paper introduces some analysis methods in recent years about imaging spectrometer data at home and abroad. Except the spectral match approach, the methods of the principal componant analysis, the optimal combination of the selected bands, the improved maximum likelihood method, the transformation based on the decision boundary feature matrix, and ortho-subspace projection approach are introduced. Some effects of these methods in application have been described as well.
In recent years, with the development of the theory about Artificial Neural Network(ANN) system, the neural network technology is becoming increasingly an effective means of classification processing of remote senser digital images and beginning to replace the Maximum Likelihood Classifier(MLC). This paper discusses some ANN methods that have been very effectively applied abroad. these methods have vast prospects on digital image processing. At last, some principled problems about the practical application of the methods to remote sensing data classification are discussed.
No.9711 typhoon (WINNIE) is the strongest and the widest influence in recent years in China. The storm surge, caused by the coincidence of the typhoon’s landing with the occurrence of an astronomical surge, resulted in serious damage along the coastal regions of Zhejiang and Jiangsu provinces as well as Shanghai city. After the typhoon’s landing, the centre of the typhoon passed through 5 provinces, while the torrential rain associated with the typhoon system fell in 7 provinces and a city, which made direct ecnomical loss about 25 trillion Yuans. This paper, based on the structures and characteristics of the cloud system on satellite image, classifies the evolusion of this typhoon into 4 stages—the developing stage, the landing stage, the merging stage of typhoon clouds with cold front clouds to the north and the changing stage of typhoon clouds to extra-tropical cyclone clouds. The relationship between the typhoon clouds in different stages and the distribution of torrential rain in space and in time is also discussed.
Coal fire is a commonly existed disaster in the coal fields of northen China, it burns huge amount of coal resource, worsens environment. It is an important job to use remote sensing images to detect and monitor coal fires, deliver information for firefighting. Because of some restriction, we can’t get images with appropriate spectral resolution and the time of scanning we want. When analysing the images we have to take acount of the effects of image types, scanning data, DTM, climatic condition, character of rocks. The paper focuses on discussing the relationship between thermal radiant temperature and the factors mentioned above.
Taking MSS and TM false colour composite imagery as basic information sources, this paper focus on studying the types, distribution status, affecting and inducing factors of mud rock flow hazards in surrounding area of the Tarim basin. By interpretation and analysis of nature factors such as geology (rock characteristics, textonics), geomophology, vegetation, hydrology (river distribution, glacier and snow cover) which control the forming and development of mud rock flow in remote sensing imagery, the hazardous intensities of mud rock flow in this area have been classified and evaluated.
In this paper, the authors take Acheng, one City of Heilongjiang Province as an experimental area of supervision the scale of 1:50 000 TM false colour composite image is used to investigate the city’s landuse present situation. By comparing with its history data, the dynamic change situation of landuse in this area is supervised, the authors also analyse the probability of the method, the land-type changes and the results of supervision.
