APPLICATION OF THE HARTLEY TRANSFORM IN THE COMPUTATION OF THE GEOID IN CHINA

This paper presents a method for the computation of the Stokes for-mula using the Fast Hartley Transform（FHT）techniques.The algorithm is mostsuitable for the computation of real sequence transform,while the Fast FourierTransform（FFT）techniques are more suitable for the computaton of complex se-quence transform.A method of spherical coordinate transformation is presented inthis paper.By this method the errors,which are due to the approximate term inthe convolution of Stokes formula,can be effectively eliminated.Some numericaltests are given.By a comparison with both FFT techniques and numerical integra-tion method,the results show that the resulting values of geoidal undulations byFHT techniques are almost the same as by FFT techniques,and the computation-al speed of FHT techniques is about two times faster than that of FFT techniques.     

江苏省盐城市建成区绿化遥感调查

此文主要介绍利用航空遥感技术对盐城市建成区绿化现状进行调查研究的情况, 通过工作基本查明了绿地面积与绿地布局, 研究了绿化指标, 了解了绿化效益, 获得了一些新认识, 为利用黑白航片进行绿化现状调查摸索了一套方法。此外, 文章对该市建成区今后绿化工作提出了一些建议。(1)参加工作的还有马万平、李宗尧、朱引, 盐城市园林管理处的刘根东, 胡碧海、吴相、贾昆参加了现场调查工作。     

川北地区岩石反射谱波特征

四川北部地区既有岩浆岩、变质岩构成的前震旦系结晶变质基底,又有震旦纪以后的沉积盖层,岩石类型十分齐全。本文根据该区的120件岩(矿)石样品反射波谱测试结果,绘制了区内主要岩石类型典型波谱曲线,并对这些波谱曲线进行了初步分析,总结了主要岩石类型的波谱特征,这些岩石波谱特征在西南地区有一定的代表性。     

APPLICATION OF THE CARTOGRAPHIC METHOD IN THE STUDY OF NATURE-SOCIETY INTERACTION IN THE MOLDAVIAN SSR

A Russian geographer describes a methodology whereby data on slopes contained within a geographic information system are employed in the compilation of geomorphological maps. More specifically, the author proposes and tests a technology for the automated compilation of electronic maps of mean slope for the territory of Altay Kray, West Siberia, Russia. Translated by Edward Torrey, Alexandria, Virginia from: Geografiya i prirodnyye resursy, 2002, No. 2, pp. 142-146.     

2001年春季沙尘天气分析

给出卫星遥感监测2001年春季我国北方沙尘过程的图像特征和产生沙尘天气系统云图的类型,初步分析了2001年多沙尘天气的气候原因.     

A COMPARISON OF AERIAL FILMS IN THE STUDY OF THE BREIDAMERKUR GLACIER AREA, ICELAND

During the summer of 1965, colour, false colour, infra-red and panchromatic photography was flown of the Breidamerkur Glacier area in south-east Iceland. Subsequent comparative interpretation studies of the film types have indicated that colour photography is superior for the interpretation of glacierized? areas. This is attributed to brightness qualities and a continuous colour tone range, which, in this instance, closely matched visual representation of ground objects. The false colour film, due to the striking tonal qualities of vegetation and moisture, is considered best for studies involving the delimitation of these features. Panchromatic film appears to be satisfactory for general interpretation work, particularly where the utmost in definition is called for. The infra-red film, because of the dark tones produced by gravels and the subsequent high contrasts between ice and gravel debris on the ice surface, is considered a poor choice for the interpretation of glacierized areas.     

云南中甸地区CBERS-1卫星数据质量分析

将云南中甸地区CBERS-1的CCD数据(轨道号20000480402)与该地区已有的Landsat-5TM数据(轨道号132-41)进行对比,从图像的空间分辨率、几何畸变程度、辐射精度、清晰度、噪声等5方面入手,对CBERS-1的数据质量进行了分析     

ROAD-SURVEYING IN THE EAST

Abstract

The title of this article is wide and generous, covering the art of road-surveying under every condition of climate from snow to tropical heat and in all types of country from moist forest to arid desert, from wooded mountains to barren rocks. But there is one feature that is common to all these conditions. Skilled supervision is at a minimum, and semi-skilled subordinates do the work. This has naturally had an influence on the quality and extent of the surveying carried out as a preliminary to the making of new roads. Some junior official, frequently from a subordinate service, is detailed for a survey, and he is expected to locate the final centre-line of the road on the ground and to produce plans, sections and a complete construction estimate. How then does he set about it? He probably has a small-scale map—in India, if he is lucky, a good, contoured, one-inch-to-the-mile map; and there are almost certain to be village tracks, either cart-tracks or man-tracks. Further, there will be certain obligatory points on the route, a pass to be crossed, a river to be bridged in a particular neighbourhood where it has well-defined banks, a town or village to be served, and so on.     

PHOTOGRAMMETRIC DEVELOPMENTS IN THE ORDNANCE SURVEY IN 1990

The author, a research and development manager at Ordnance Survey, reviews current developments in photogrammetry including the automatic correlation of image points for aerial triangulation, digital photogrammetric map revision, mapping from SPOT imagery and progress in aerial photography.     

高分辨率遥感影像在云南澜沧老厂矿床地质研究中的应用

在云南澜沧老厂矿床地质研究中,高分辨率QuickBird 影像提供了丰富的地质异常信息:影像线-环结构反映出矿床的控矿环形构造及隐伏构造信息;影像色调异常斑块显示了地面围岩蚀变区域;遥感异常与物化探异常的高度吻合,为地质构造分析和成矿预测提供了有用信息和佐证.     

应用遥感图像进行宝成铁路沿线地质灾害的分析

本文通过对4400多张不同时期航片和5幅卫片(部分用计算机和光学图像处理等技术进行了 信息增强提取)的解译, 结合前人资料和地面调查验证, 对宝成铁路(宝鸡-绵阳段)沿线约 5000km²范围的灾害地质现象和环境地质因素进行了分析, 论述了地质灾害的分布发育规律及与地 质环境的相互关系, 提出了铁路沿线地质灾害的防治对策和建议。     

湖北省保康磷矿区开采面及固体废弃物遥感信息提取方法研究

统计分析了湖北保康磷矿区有关目标地物(道路、建筑物、坡耕地、植被、水体及阴影等)的SPOT 5影像特征,认为它们具有一定相似性和差异性,依赖单一的遥感分类方法难以实现对矿区开采面及固体废弃物信息的准确提取.采用决策树分类方法,设置一定的分类规则,结合数字高程模型和含矿地层等相关辅助数据,逐一对矿区相关地物进行分类,经分类结果后处理,分类精度达83.4%.     

90年代世界遥感技术的发展

文章概略地介绍了世界主要发达国家和发展中国家计划发射的一系列新的高性能环境监测卫 星和自然资源勘查卫星和新一代遥感传感器情况以及遥感技术的发展趋势。详述了新的遥感技术 在地质、海洋、资源、环境、农林等领域将开拓的新的应用前景。     

THE YEAR 1931 IN NIGERIA

Abstract

The outstanding feature of 1931 was undoubtedly the rapid fall in the revenue of the Colony and Protectorate, which half-way through the year necessitated drastic reductions in Government expenditure, and in the case of the Survey Department led to the termination of the appointments of 15 European surveyors, I lithographer, and 20 members of the African staff. This cut, equivalent to a reduction of 28 per cent. of European and of 13 per cent. of African personnel, had unfortunately to be carried out at the height of the topographical and trigonometrical season and naturally entailed the closing down of some survey operations and the re-posting of officers to other duties to readjust the reduced personnel to more urgent requirements.     

SURVEY IN THE GREAT WAR

Abstract

Artillery Survey.—Included in the term “Artillery Survey are two distinct problems, the first that of determining the “line” and “range” at which fire should be opened, and the second that of laying the gun in the required line. To appreciate these problems it. is necessary to know a little about the technique of gunnery, and for the benefit of those who have no acquaintance with the subject the following brief résumé may be given.     

超站仪HD-STGPS在北京市地籍测绘中的应用

阐述了HD－STGPS的特点，通过在北京市地籍测绘中使用该仪器，得出了有益的结论和建议，可供其它单位参考。     

THE YEAR 1932 IN NIGERIA

Abstract

The general organization remained the same as during the last few years, but owing to the reduction last year by 32 per cent. of the European and by 8 per cent. of the African-personnel the output of cadastral and topographical work was considerably lower. Against this, however, there have been increased activity and larger output from the drawing and lithographic sections.     

THE YEAR 1934 IN NIGERIA

Abstract

The year has been made noteworthy by the decision of Government to amalgamate the Land and Survey Departments under the direction of the Surveyor-General with the title of Commissioner of Lands and Surveyor-General. As the fusion of the two Departments took place only towards the end of the year, this report covers only survey activities for the year 1934.