TRAINING AFRICAN SURVEYORS IN UGANDA

Abstract

Under the Buganda Agreement, which was made in 1900 between the British Government and the Kabaka (King) of Buganda, approximately 9,000 square miles of the kingdom of Buganda were divided into numerous estates, which were allocated to the various reigning chiefs and people of importance at that time. The British Government agreed to survey these estates, most of which were one square mile in area; thus, the term “Mailo” as applied to the land owned by the Baganda, came into use. Since the original Mailo survey, which was completed in 1935, many of the estates have been subdivided. The land has been sold piecemeal, gifted and bequeathed, so that plots now exist which are even less than one acre in area and some in and near large townships are as small as half an acre. The task of the Survey Department is a gargantuan one and, in 1949, it was estimated that there were some 150,000 outstanding surveys.     

THE UGANDA MAlLO SYSTEM

Abstract

So much for the system. Now to describe the method of survey. Between 1902 and 1906 a chain of triangulation, extending from Zanzibar by way of the southern border of what is now Kenya Colony, and the northern and western shores of Lake Victoria to the Belgian Congo, had been surveyed by Anglo-German Boundary Commissions under G. E. Smith and Delmé Radcliffe as leaders. In 1902 a base line was measured near the middle of the Buganda Province by officers of the Uganda Survey Department. This was connected by triangulation to the Anglo-German chain, and several new chains were run across Buganda of an order of accuracy generally classified as that of tertiary triangulation. These chains are now known as the Uganda Main Triangulation, and form the backbone of the Buganda Cadastral Survey, popularly known as the “mailo” survey.     

PHOTOGRAMMETRIC MAPPING IN SOUTH AFRICA

Abstract

This discussion relates to the use by the Trigonometrical Survey of South Africa of Wild photogrammetric equipment in the compilation of 1/18,000 topographical maps from 1/30,000 photographs and to the accuracy of the work found thus far by field check. The equipment used, the field and compilation methods and the specifications for the work are briefly described in this article.     

THE UGANDA MAlLO SYSTEM

Abstract

The survey of “mailos” or native estates in the Kingdom of Buganda has taken a prominent place in the annual programme of the Survey Department of Uganda for over 30 years past. The survey, which has covered some 17,000 square miles and is now practically complete, has some unusual features, and although it has no claims to refinement or to great precision, a short account of its history and workings may be of general interest. The system of land settlement introduced by Sir Harry Johnston has already been described in the Empire Survey Review (“The Surveyor and the Politician”, by H. B. Thomas, vol. ii, p. 28).     

RELATIONS OF BEACON AND DEED-PLAN IN SOUTH AFRICA

Abstract

MR. C. O. GILBERT'S article on “Beacon versus Deed-plan” (E.S.R., Jan. 1932, pp. 98–99) raises a question of very great importance in those countries which have a system of land registration. In addition to the legal and technical aspects of the question, it raises the very important question of preservation of beacons and replacement of lost beacons. As he mentions the South African practice, the experience of the Transvaal may be of interest to readers, the more so as the case, The African and Buropean Investment Co., Ltd. and Others versus John Warren and Others, which he quotes, concerned farms situated in the Transvaal. I also wish to refer specially to the Transvaal, because there the diagram or deed-plan is of great legal force when there is a conflict between the position of a beacon on the ground and the position accorded it by a confirmed diagram.     

UGANDA,LAND AND SURVEY DEPARTMENT,ANNUAL REPORT, 1938

Abstract

Among colonial dependencies Uganda is but a small territory; but it is comparatively prosperous and is compact. In such circumstances the integration under one departmental organization of survey and registration and of the administration of the State's responsibilities for lands and mines proves to be a convenient and economical arrangement, which works, in the balance, to the advantage of the survey branch. The Annual Report for 1938 deals with all the activities of a diversely occupied department, which controlled revenue collections of over £56,000, and mineral exports valued at £225,000.     

利用NOAA/AVHRR资料监测南方林区森林火灾的研究

本文论述了南方林区森林火灾时间分布集中、发生率高、面积小,并以地表火为主的特征;总结了气象卫星资料的林火信息特征和非林火干扰信息规律;研究了建造林火监测专家系统的理论方法,进而提出了林火宏观实时监测系统的总体设计,并建立了以计算机图像处理为基础的、以林火背景数据库支持的、以专家系统为核心的林火监测系统。并利用南方林火模拟实验和历史林火资料对该监测系统进行了改进。最后讨论了林火监测系统改进方向和研究体会。     

TM资料在中国南方土地利用调查中的精度分析

作者在具有典型南方特色的杭州市郊遥感试验区,对TM资料在土地利用调查中的应用精度进 行了分析。试验选用了夏末时相的TMCCT数据,经计算机处理、外拍扩印成1: 5万图像,采用目视 综合解译、微机-数字化面积量测,其结果以大比例尺图件上量测的面积为基准,对TM资料的调查 精度作定性、定量的分析,最后得出有可能利用TM资料进行中国南方县级土地利用监测的结论。     

南中国海海洋油气遥感调查研究

对NOAA-11资料进行除云、大气订正和几何纠正后,用CH4、CH5波段进行SST处理,用CH5、CH2、CH1作假彩色合成图,并对CH1、CH4、CH5波段灰度值与南海相关研究点的海面温度、重力、磁力异常和热流值等实测数据进行多元相关分析,通过观测比较和理论分析,解决了海洋油气遥感技术和应用模型等问题,为海洋油气资源的探测提供科学依据.     

基于多时相图谱的青藏高原湖泊变化检测研究

利用多期遥感影像,对青藏高原南羌塘地区纳木错湖泊流域北部进行解译,提取了多时相地学信息图谱,发现1992-2005年间,湖泊面积扩张且整体变化呈加快趋势。分析了研究区内典型湖泊的变化特征,确定了稳定增加的湖泊面积。通过多时相地学信息图谱检测的变化信息与区内多年气象数据的复合分析,探讨了湖泊变化与气候变化的响应关系。     

阿深高速公路湖北省南段控制基准检测与精度分析

介绍了阿深高速公路湖北省南段控制网基准检测的外业实施和数据处理与分析,并用F检验方法对原测量成果和检测成果差异进行了显著性检验,得出了一些建议和结论。     

辽南金矿集中区卫星图像构造解译及构造控矿模型探讨

辽南地区是我国最重要的五大金矿床集中区之一,大、中、小型矿床、矿点众多,矿床类型复杂,控矿因素多样。与国内外大多数金矿一样,在诸多控矿因素中,构造变形因素最为重要,而且有其自身的变形特点和特殊的控矿类型。本文旨在着重讨论辽南这一特定的金矿集中产出地所具有的构造控矿特征和构造控矿模型,为研究大型金矿区或金矿群的形成条件提供借鉴。     

THE NORTH AND SOUTH EXPERIMENT

Abstract

I Commenced this experiment many years ago, and other persons in various parts of the world have since tested it abroad. By far the greater number of their results are quite satisfactory.     

ADJUSTMENT OF THE SECONDARY TRIANGULATION OF SOUTH AFRICA

Abstract

The Secondary Triangulation of South Africa consists of a uniform network of triangles of from 5- to 10-mile sides, enmeshed in the Geodetic and Primary Triangulations. As a rule the Primary Triangulation is rigorously adjusted by least squares, and the Secondary made to conform to it by an approximately rigorous method which was introduced into the Trigonometrical Survey in 1920 by the late Dr van der Sterr.