THE PROJECTIVE TRANSFORMATION IN AERIAL SURVEYING

Abstract

4.3. Having found s we may proceed to obtain the coordinates of the air station. This is the vertex of a pyramid, the base edges being of lengths a, b, c and the opposite edges measuring u, v, w respectively. Let h be the distance of the vertex from the plane of the base, and suppose d, e₁ e₂, e₃ are respectively twice the areas of the base and of the oblique faces in order.     

GPS-RTK平面坐标转换方法研究

推导出GPS-RTK四参数平面相似转换模型的转换参数计算简化公式,研究了拟合点数及其分布对转换参数精度的影响,提出了改善转换精度的措施和方法.     

THE RANGEFINDER IN TROPICAL TOPOGRAPHICAL SURVEYING

Abstract

In text-books on surveying the rangefinder is usually dismissed in one sentence, which merely remarks on its inaccuracies and places in the category of scientific curios an instrument which should be most valuable to the plane-tabler in certain types of country. It is to combat this effect and to help topographers in their arduous work that these notes have been written. They are written from experience gained on topographical survey, on a scale of 1/125,000, in a tropical dependency where reduction of cost is of primary importance.     

运用GPS测量对自贡市城市控制网点的改算

本文通过对运用GPS测量改算自贡市各等级城市控制网点成果的过程及结果的论述分析,证实了运用GPS测量改算城市控制网点成果具有精度好、效率高等特点。在此基础上探讨其可行性,并提出一些看法。     

航测大比例尺数字化测图中的若干问题

在航测全数字化测图软件还比较昂贵的情况下，立足现有高备，运用测绘新技术，进行大比例尺航测数字化成因，获取数字地图，为城市地理信息系统提供基础信息，对中小城市的测绘工作是一种较好的选择。     

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。     

德国黑森州的测量与地籍测量

文章介绍了德国黑森州测量与地籍测量的发展，现状及趋势。从法律体制、行政管理到生产形式等方面叙述了当今发达国家的测量体系的建立及运转．     

论测绘仪器在促进测绘事业发展中的作用

本文主要论述了测绘仪器在促进测绘事业发展中的地位与作用，说明加快发展我国测绘仪器的必要性，同时提出了发展我国测绘仪器的建议。     

荷兰地籍测量的发展

荷兰地籍测量有着很长的历史,形成了自己独特的风格。在科技飞速发展的今天,它也正经历着从传统手工作业向现代化测量的变更。荷兰地籍测量在土地信息系统建设、大比例尺基本地形图以及地籍图的测量、更新方面已取得了很大成就。相信对我们有借鉴作用。     

彩红外航片在忻定盆地水浇地清查及盐碱地动态监测中的应用

本文报导运用航片综合判读法原理,进行一级水浇地。二级水浇地,三级水浇地判读的方法,及其彩红外航片影像标志的研究,并依据1980和1987两年拍摄的航片,以具有代表性的定襄县为。例,分析该盆地七年间盐碱地的消长变化情况。     

NOTES ON THE USE OF THE SLIDE-RULE IN TOPOGRAPHICAL SURVEYING

Abstract

The Survey in which the following methods were employed was for a final map on a scale of 1/500,000, with contours at a 500-foot Vertical Interval. In order to make use of any available information shown on existing maps, the scale used in different areas in the field was that of existing maps. These scales were 1,000 roods to 1 inch (1 rood = 12.396 English feet), 840 roods to 1 inch (1/125,000), and 1,680 roods to 1 inch (1/250,000).     

基于K-L变换的彩色航空影像阴影检测

从K-L变换的原理及其特性出发,提出了一种利用K-L变换技术来对影像上的阴影进行检测的方法,实验表明其对彩色航空影像上阴影区域的检测是有效的.     

AERIAL AND SPACE PHOTOGRAPHS IN THE STUDY OF GEOSYSTEM DYNAMICS

A Siberian geographer explores real and potential applications of remote sensing imagery in research on geosystem dynamics. Four different methodological approaches to the analysis of geosystem dynamics are identified and described: comparison of heterochronous and seasonal imagery, geosystem forecasting and reconstruction based on image analysis, determination of current state and extant geosystem trends, analysis of linkages and interactions among geosystem components. Translated by Edward Torrey, Alexandria, VA 22308 from: Geografiya i prirodnyye resursy, 1992, No. 4, pp. 140-146.     

EXPERIENCES IN PHOTOGRAPHIC SURVEYING

The author outlines his experiences of photographic surveying, in the early years of the 1930's in the Survey of India, which involved the use of simple graphical methods of plotting.