The Photogrammetric Society Analogue Instrument Project: A Fifth Extract

The paper entitled The Photogrammetric Society Analogue Instrument Project was published in The Photogrammetric Record, 14(82): 565-582 and contained, as Appendix A, an extract from the Archive concerned with the history of the Zeiss Stereoplanigraph in Great Britain. A further three extracts have since been published to provide details of direct optical projection instruments used in this country and of the Vivian Thompson Stereo-plotter.
This fifth extract deals with the Wild A5 and A6 instruments. Their introduction into the United Kingdom during and just prior to the Second World War, together with their important contributions to the war effort, make interesting reading. With a grand total of just five such instruments, they were well used throughout the period of hostilities.
This extract also includes a note on the Wild A4 instrument, designed for close range photogrammetry. This was the last instrument in which Wild made use of projector lenses but it has been included at this point so that all of the Wild instruments which are listed in the Catalogue (and therefore included in the Archive) are dealt with in numerical order.     

The Photogrammetric Society Analogue Instrument Project: a Fourth Extract

The paper entitled The Photogrammetric Society Analogue Instrument Project was published in The Photogrammetric Record, 14(82): 565-582 (October 1993) and contained, as Appendix A, an extract from the Archive concerned with the history of the Zeiss Stereoplanigraph in Great Britain. A further two extracts have since been published to provide details of direct optical projection instruments used in this country. This fourth extract now goes on to begin to provide some details of analogue plotters that employed a purely mechanical solution. The first instrument of this type to be described is the Vivian Thompson Stereo-plotter of 1907. It was in fact the very first instrument of this important category ever to be produced but unfortunately it was also the only one produced in Great Britain.     

The Photogrammetric Society Analogue Instrument Project: A Sixth Extract

The paper entitled The Photogrammetric Society Analogue Instrument Project was published in The Photogrammetric Record, 14(82): 565-582 and contained, as Appendix A, an extract from the Archive concerned with the history of the Zeiss Stereoplanigraph in Great Britain. Further extracts have appeared in each of the subsequent issues.
This extract, the sixth of the series, completes the history of the use of the various types of Wild instrument in the United Kingdom. It is concerned with the later post-war instruments, in numerical order, from the A7 Autograph to the A10 and therefore includes a note on one of the most popular and successful analogue plotting instruments ever produced, the Wild A8 Stereoplotter.
At the moment, none of the instruments dealt with in this extract appear to be under immediate threat. However, their role as production instruments is fading fast in most organizations but they are being retained, often for training purposes.
The Archive contains no mention of the last and most refined range of analogue instruments produced by Wild as their Aviomap (AM) series. With the benefit of hindsight it is now obvious that, at the time of their introduction, the transition from analogue to analytical techniques was about to take place at an accelerating pace. There is therefore no entry in the Archive for any AM or AM-U instrument; none (or perhaps only a very few) seem to have been imported into the United Kingdom.     

Uuno Vilho Helava at the National Research Council of Canada from December 1953 to September 1965

The Canadian government's imaginative approach to fostering scientific excellence produced an environment ideal to draw the very best from Uki Helava's fertile intellect when he joined the Photogrammetric Section, Division of Physics, NRC, Ottawa in 1953. Initial work on error control in aerial triangulation led into the design of instruments for image measurement. This work culminated in the production of the NRC Monocomparator, but Helava's main effort was devoted to the analytical plotter, for which a working model was exhibited in 1963. Difficulties with the commercialization of this device led to Helava's decision to leave NRC in 1965.     

THE PHOTOGRAMMETRIC SOCIETY ANALOGUE INSTRUMENT PROJECT

In 1989, the Council of the Photogrammetric Society decided that some record of the use of analogue photogrammetric equipment in Great Britain should be preserved before it was too late. The author agreed to investigate this matter as a research project funded by a number of survey organisations. Work on the project so far has resulted in the completion of two documents. The first is a Catalogue of Analogue Instruments that list some 230 instruments of 30 different types. The second is an Archive that gives further details of the history and use of the 30 different types of instrument. The entry included in his paper, by way of example, is that concerned with the Zeiss Stereoplanigraph. Readers are encouraged to provide corrections and additional information wherever possible.     

The Photogrammetric Society Analogue Instrument Project: An Eighth Extract

This eighth and penultimate extract from the Archive is an unusual one for a number of reasons. Of these the most important one is the fact that it is concerned solely with instruments produced in Great Britain. It is therefore concerned mainly with the Thompson-Watts plotter, the only British instrument to go into full-scale commercial production. Strictly speaking the other instrument included in this extract should not have had a separate entry at all, simply because no instrument of this type exists now and so cannot have an entry in the catalogue of instruments. However, in order to trace the development of the Thompson-Watts Mk 2 plotter, produced in 1963, from the remarkable work of Henry Fourcade carried out in the 1920s, the Barr and Stroud ZA2 plotter based on his work has been accorded an Appendix of its own.
Both instruments in this extract are based on an optical-mechanical solution to the photogrammetric problem of space intersection and the Thompson-Watts is in fact the only instrument of this type to be found in the catalogue. This particular solution did not find great favour on the continent and so few instruments of this type were produced commercially.     

THE USE OF POLYNOMIALS FOR ADJUSTING STRIPS TO CONTROL

The following article and correspondence have been reproduced from 'The Photogrammetric Review,' the journal of the Ordnance Survey Photogrammetric Society, by permission of the editor, as it is relevant to the paper by Professor Thompson, published in 'The Photogrammetric Record,' Vol. 1, No. 1, of March , 1953.     

The Photogrammetric Society: 1952–2001

A scholarly account of the formative discussions, the founding and the first 20 years of the Photogrammetric Society was published in 1971 and republished in 1974. This present review concentrates on the latter years of the life of the Photogrammetric Society prior to its merger with the Remote Sensing Society in 2001.
The authors joined the Photogrammetric Society in 1960 and were conspicuous in its affairs for many years. Although both occupied the Society's presidential chair, they also fulfilled several other roles in its efficient management. Atkinson's first contribution to the Photogrammetric Record was published in 1968 and Newton's in 1971.     

对Roland—GRX300AR绘图仪进行刻图功能改进

本文介绍了对Roland-GRX300AR绘图仪进行别困功能改进的方法．使之能输出满足印刷制版要求的地图刻给原团。同时．也介绍了编制适用于本仪器的高精度地图符号库软件的思路。     

THE ROLE OF THE PHOTOGRAMMETRIC SOCIETY: RESULTS OF A QUESTIONNAIRE

M embers of the Photogrammetric Society, both individual and corporate, were sent a questionnaire during December 1985. The content of the questionnaire touched upon many aspects of Society activities and it is intended that the substance of the replies should help to direct the Society in the future. An analysis of these responses was presented to the Thompson Symposium at the University of Birmingham on 19th April. 1986. It is reproduced here, together with a summary of the discussion which ensued on that occasion. Readers are encouraged to add their comments to those which follow. sending them to the Editor of The Photogrammetric Record or to the Honorary Secretary of the Photogrammetric Society.     

A NEW PHOTOGRAMMETRIC PLOTTER: THE CP1

The paper describes a new type of photogrammetric plotter based on first order formulae. It differs from other attempts at this, in that all the implications of these formulae are accepted with the three principal consequences that the operator views a model that is free of y-parallax, that all effects of convergence of the pictures, including errors in the vertical scale, are removed and that geometrical errors in the heights do not increase with increasing ground elevations. The principles lead to a robust, cheap plotter.     

基于VirtuoZo数字摄影测量系统的正射影像制作

主要就基于VirtuoZo数字摄影测量系统制作正射影像图进行了系统的介绍,并就某些参数的选择和设置以及系统某些功能的适用性进行了讨论和介绍。     

VirtuoZo数据的转换处理

在全数字摄影测量工作站VirtuoZo上获取的矢量数据为CAD12.0的数据格式,由于我国比较常用的信息处理软件没有统一的编码要求,因此获取的VirtuoZo数据要根据用图单位的需求进行数据的转换.针对上述问题探讨了VirtuoZo数据转换处理为其他系统数据格式的程序设计方法.     

Computer Assisted Learning of Photogrammetric Measurement

This paper describes a project, the aim of which was to develop a computer assisted package for the teaching of analytical photogrammetry and especially the use of the ADAM Technology MPS-2 Micro Photogrammetric Stereoplotter.     

DEVELOPMENT OF AN INEXPENSIVE ANALYTICAL PLOTTER

The author continues the discussion of a Norwegian project to develop a stereoscopic instrument which will reduce the cost of analytical photogrammetry. Parts I and II of the project were presented at the 1984 Thompson Symposium; the objective at that stage was to build an image space plotter. This paper covers Part III of the project and the extended objective to develop an inexpensive analytical plotter which links with a modern microcomputer.     

无人飞行器低空摄影技术探讨

陕西省第二测绘院自2007年关注利用无人机进行航空摄影测量,2008年在陕西凤翔县,“中兵光电公司”合作试验,按测量规范的标准生产出1:2000的正射影像地图15Km2.本文以我们实践体会,就“无人机摄影测量”的推广应用中遇到的问题,以测量用户的角度提出推进建议.     

A REVIEW OF MAP REVISION BY PHOTOGRAMMETRY

Revision has become a task equally as important as new mapping. Photogrammetric methods, however, have developed around the latter rather than the former. Modern instrumentation rejects this growth process. This paper examines the efficacy of various photogrammetric approaches for revision with respect to both detection and plotting of change.     

浅谈空中三角测量在实际工作中的应用

提出了利用VirtuoZo AAT进行空中三角测量的工作流程，并通过在VirtuoZo数字摄影测量工作站上进行的实验，对自动空中三角测量的实际精度进行了分析，提出了实际应用的一些看法。     

浅谈空中三角测量在实际工作中的应用

提出了利用VirtuoZo AAT进行空中三角测量的工作流程,并通过在VirtuoZo数字摄影测量工作站上进行的实验,对自动空中三角测量的实际精度进行了分析,提出了实际应用的一些看法。