摘要:

AbstractThe writer describes a test measurement of a base 240 metres long, using a modified differential technique, in which the agreement with the catenary measurement by the Ordnance Survey was 2 mm. The method is advocated for accurate measurement, and as a routine field procedure to check the calibration and delay line tables of a particular instrument.

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.145.98

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

摘要:

AbstractAn attempt has been made in this paper to develop a rapid semi-graphic method of precise adjustment of a doubly-braced quadrilateral of measured lengths by least-squares fitting on various systems of weighting, without recourse to elaborate computations and voluminous trigonometrical tables as in the existing methods.

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.145.102

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

摘要:

AbstractThe author has tested a method of deriving an azimuth from a series of pointings on the Sun for a place of unknown latitude. A series consisted of 6 to 8 observations in face left and face right and lasted from 1 to 1½hours. A theodolite reading single seconds and fitted with a Roelofs prism was used to measure zenith distances and differences in azimuth. From a total of 23 series at a station of latitude +3°07′(Kuala Lumpur) the standard error in azimuth of a single series was found to vary from about 5″to 12″(arc-seconds).

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.145.116

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

摘要:

AbstractA previous paper upon traverse networks dealt with the precise adjustment of traverse observations of distances and vertical angles, by a method of condensing the normal equations to a set between the junction and terminal points. In the present paper, an explanation will be given of the adaptation of the same method to the correct computation and least-squares adjustment of traverse observations of distances and horizontal angles. To avoid excessive explanation, it will be assumed that the reader has followed the previous paper.

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.145.132

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

摘要:

AbstractA discussion meeting on“Automated Cartography—Scientific Needs and Technical Possibilities”, organised by the Joint Computer Groups of the Institution of Electrical Engineers and the Institution of Electronic and Radio Engineers, together with the British National Committee for Geography of the Royal Society, was held at the Institution of Electrical Engineers in London on March 20th, 1967.

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.145.139

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.145.141

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.145.143

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.145.144

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.145.i

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor