最新刊期
卷 ， 期 3 ， 1988
- 摘要：This paper introduces character of SPOT image and explores the potential of SPOT image in comprehensive survey in Tangshan urban area. Seven thematic maps including landu-se, geomorphology, soil, vegetation, drainage, transportation and environment in Tangsan urban area were mapped by using 1:50000 SPOT color composite.From this study, it can be concluded:1. After geometric correction, the SPOT color composite with scale of 1:100000 possesses the best visual effects, and with scale of 1:50000 is the maximum scale among usable products and can be used to produce thematic maps of 1:50000.2. The smallest detectable area is of 25 m by 25 m, and the narrowest width of linear is about 10m in the SPOT color composites with scale of 1:50000. It can satisfy the requirement of land use survey at the district and county. I is an effectual way monitoring dynamic changes in the area. There is wide spread of application of SPOT image for comprehensive survey in the area.
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发布时间：2021-06-10 - 摘要：In this paper we have studied the use of multistage remote sensiny image information by sampling of the multistage unequal probabilities （sampling with probability proportional to size） to do the forest resources inventory.In is verified that this method is efficient in the forest resources inventory of large areas. Besides, to monitor the change of the forest resources, it is also worth to recommend as a technical method. The adventages of this method lie in the fact that the aeronautical and spacial remote sensing information is combined together, and furthermore the remote sensing and sampling too. Thus, it fully develops the potential abilities of remote sensing information.
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发布时间：2021-06-10 - 摘要：This paper is aimed at soil mapping technics with remote sensing data to produce a soil map at a prefectural level （1:200000） from county level （1:50000）. The principles of mapping synthesis for our research are 1. the new boundary is delineated on the base of soil family boundary on the original soil maps, 2. the regularity of soil distribution has to be studied so that soil mapping units are merged and distinguished according to the regularity and the interpretation of Landsat image, 3. some mapping units with regularity are presented as association after they are merged.The mapping scale was reduced from 1:50000 to 1:200000 after the mapping units were changed from the series on original soil maps to the families on the new map. To meet the need of the scale change, some modifications for the classification system were made. The base map was prepared from topography maps which can satisfactorily reach mapping accuracy. New soil map and Landsat image were overlapped, on which the synthesis and corrections were carried out. We merged some families into one family according to Landsat image pattern and ground truth data. For same soil types without special interpretation character, we made few changes. The results show that this method is more effective than the traditional one. It saves time and expense.
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发布时间：2021-06-10 - 摘要：The inventory was conducted mainly on the base of the 1:50000 TM image, composed of band 3, 4, 5; imageried on 1984. 5. 7,Using "Composition-Enlargement-Correction" image formation method, combined with field survey, the visual interpretation results were transplotted to a 1:50000 topographic map and the area error is only 1.48% （compared with the field survey）. It’s shown, high precise inventory of the lake and wet land in large area by using TM data is feasible.
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发布时间：2021-06-10 - 摘要：Up to now, the problem on tidal mud flat topometry has not been solved well. According to the covering characteristics of tidal mud flat which is different from ocean and land as well. This paper presents a metod that combines bathymety with aerial photogrammetry. Its characteristics is that the horizontal position of the tidal flat topometry is dealed with aero-topographic technology, and the elevation is based on the original bathymetric data which has been corrected from the datum. The test results show that, on a tidal mud flat topographic map of 1:50000 with contour interval of one meter, the elevation error is 0.38 meher.关键词：航空摄影测量;海道测量;淤泥质海滩;普通地形测量
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发布时间：2021-06-10 - 摘要：In 1927 year, 8 magnitute earthquake occured in the Gulang region. Present, medium-strong earthquakes occur frequenty. This paper introduced the basic character of tectonic land-form, circular struture and main linear structure based on the interpretative result from the Landsat images, air-photos and field investigation.This paper also discussed indally the seismo-tectonic environmnt （M≥4） and pointed out the relation between the seismic occurence and the deep-seated structure, circular structure, main acive faults zone and net rift of linear structures. Most epicentres are controlled by the cross points of netted linear structures in the region.
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发布时间：2021-06-10 - 摘要：The emissivity of natural meterial is a important factor in the interpretation of thermal image. Sometime, the effect of emissivity is quite conspicuous under some specific conditions of environment. However, one does not, pay enough attention to their infuluences in the interpretation of the thermal remote sensing data. In this paper, author proceeded with the thermal radiation law attempts to illustrate this problem by combining the thermal image and temperature measurement data on the ground. Meanwhile, some factors to be closely related to the emissivities have been represented. But, how we can eliminate their effects in the interpretation of thermal image is depended on further study.关键词：Emissivities;Thermal Image;Effects
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发布时间：2021-06-10 - 摘要：For mudflow investigating, method of inspecting one by one the scenes of gullies has long been used. It not only gives rise to a great amount of field work, but also is limited by the factors of climate, topography, traffic condition and field of vision etc. So, by this method, it is affected seriously to judge a mudflow gully correctly.Applying aerial remote sensing technology in investigation of mudflows can overcome the disadvantage factors in ground surveying, reduce intensity of work and increase the correctness of judgement. It mainly rely on the characteristic of tones, patterns, veins and hydrographic nets on aerial photos to identify various elements which may cause a mudflow or not. By practice, it is clear that adopting aerial remote sensing technology in the investigation of mudflows has produced good results, so it should be spread out for an extensive use.
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发布时间：2021-06-10 - 摘要：During October, 1984, the United States Space Shuttle Challenger carried a large format cartographic camera that took an excellent set of high resolution photographs of limited areas in western China. The results of this experiment （for both worldwide coverage and China coverage） are reviewed. The coverage of western China, the number of photographs taken, and the films used are all reviewed, in detail.The extraordinary high quality of the photographs of China is discussed. Some present and anticipated uses are reviewed. Examples of the photographs from western China are reproduced at various enlargements to illustrate the image characteristics.
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发布时间：2021-06-10 - 摘要：The radiometer is a portable battery operated instrument, consisting of two main parts: optical head and processing unit. The optical head is equipped 6 channels between 0.4 and 2.5 micrometer, which may match with MSS, TM bands, and others. It is easy to change the FOV and passband filter of channels in field conditions by modular design. The processing unit records and processes the data from the optical head, it’s foundmental component being a microprocessor. The system is adaptable to helicopter, truck or tripod platforms, it is also suitable for hand-hold operation.The general properties of the system are:1. comparatively inexpensive to acquire, maintain and operate,2. simple to operate, calibrate and service,3. rapid measurement ability,4. complet with data handing, processing hardware and softwre.Some results of application are shown, which has proved that the system can be utilized by many researchers to obtain large numbers of accurate, calibrated spectral measurements for remote sensing.
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发布时间：2021-06-10 - 摘要：In this paper, method of staud type recognition on the aerial photography was discussed using the incident series analysis based on grey system theory.A data series of spectrum photoelectrio current for structural characteristics of stand type space distribution of in formotion of sample areas in the aerial photography were defined. Then, the pattern of spectram series of standard recognition obyects were set up, and the incident extent between the awaited recognition objects and the standard recognition objects was calculated with this method. Finally, the stand type of awaited recognition objects was deter-mind.关键词：Grey System;Aerial Photography;Pattern Recognition
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发布时间：2021-06-10
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