ISSN:0039-6265    

DOI:10.1179/sre.1973.22.170.144

出版商:Taylor&Francis    

年代:1973

数据来源: Taylor

摘要:

AbstractVarious computing methods were studied with a view towards fully automating the computation of field surveys represented by raw triangulation, trilateration and traverse observations recorded in a field-book. The outcome of these studies was a very simple, geometrically defined relaxation method [1] which is suitable for the computation and least squares adjustment of any mixed set of measurements defining a two or three dimensional, free or anchored network. The method has the advantage, first, that convergence, not being dependent upon the quality of initial approximations, is very reliable, and secondly, that numerical stability permits the use of optimally small computer precision. Also, computer storage is very efficiently utilised. Convergence to a solution in good local agreement within the network is usually rapid, although, as is typical of relaxation methods, convergence to a final solution can, in certain poorly-conditioned cases, require a large number of iterations. As will be demonstrated, however, the iteration computations are very simple and can be very rapidly processed.

ISSN:0039-6265    

DOI:10.1179/sre.1973.22.170.145

出版商:Taylor&Francis    

年代:1973

数据来源: Taylor

摘要:

AbstractThe chair of Photogrammetry and Surveying at University College London has now been established for a quarter of a century, give or take a year. It therefore seemed appropriate to the Institution to review the progress in land surveying education during this period and I have been invited to do this.

ISSN:0039-6265    

DOI:10.1179/sre.1973.22.170.157

出版商:Taylor&Francis    

年代:1973

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1973.22.170.164

出版商:Taylor&Francis    

年代:1973

数据来源: Taylor

摘要:

AbstractApproximate polynomials of the arctangent, tangent, cosine and sine series are offered which are suitable for use on small desk-top programmable computers, or on pocket computers in the field, which do not have inbuilt facilities for evaluating trigonometrical functions.

ISSN:0039-6265    

DOI:10.1179/sre.1973.22.170.165

出版商:Taylor&Francis    

年代:1973

数据来源: Taylor

摘要:

AbstractMany countries including the United States and Canada have a patchwork quilt coverage of Lambert's and transverse Mercator projection systems, each with its own standard parallel or central meridian, zone width and scale factor. For the developing countries of Asia, where there is an opportunity to introduce a unified system for the whole country, it would be irresponsible to allow the growth of a hotch-potch of different systems. In this paper a comparative study has been carried out, between 2°and 3°transverse Mercator zones for India, and it has been concluded that the best projection for survey integration would be a series of 2°transverse Mercator zones with an appropriate central scale factor.

ISSN:0039-6265    

DOI:10.1179/sre.1973.22.170.174

出版商:Taylor&Francis    

年代:1973

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1973.22.170.180

出版商:Taylor&Francis    

年代:1973

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1973.22.170.188

出版商:Taylor&Francis    

年代:1973

数据来源: Taylor