ISSN:0039-6265    

DOI:10.1179/sre.1980.25.195.194

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

Abstract“It is axiomatic that maps are an essential basis of effective planning; that they are needed by a variety of private and public undertakings; that for defence they may be vital; and that it is a function of Governments to provide them.”

ISSN:0039-6265    

DOI:10.1179/sre.1980.25.195.195

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1980.25.195.210

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1980.25.195.211

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

AbstractPlastic reflectors, which are both inexpensive and readily available, are considered as an alternative to the glass“corner-cube”reflector, for use with electro-optical EDM equipment over short ranges.

ISSN:0039-6265    

DOI:10.1179/sre.1980.25.195.215

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

AbstractFor the survey company which is completely automated, the production of topographic maps by non-photogrammetric methods means feeding raw field data consisting of stadia observations into a minicomputer linked to a plotter which prints the spotshots and draws the contours without further human intervention. However, for the survey office which has not yet reached this degree of sophistication and prepares maps with limited electronic aids for example reducing the stadia observations with a programmable calculator, the program presented here for interpolating contours between two spotshots with the aid of an HP25 should turn out to be an additional useful link in the production process.

ISSN:0039-6265    

DOI:10.1179/sre.1980.25.195.223

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

AbstractA method is described for conversion between Nigerian T.M. and V.T.M. co-ordinates via geographicals. Modified formulae are used to allow the conversion to be made with small programmable calculators.

ISSN:0039-6265    

DOI:10.1179/sre.1980.25.195.228

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

AbstractTheCOSMOSmachine is an automatic high-speed micro densitometer. Although specifically designed for high precision measurements in astronomy it has in practice found use in many other branches of science (e.g. medicine, aerial photography, sideways looking radar pictures and geology). For stability and accuracy the machine is maintained in an air-conditioned and temperature controlled (20°±0.5°C) environment. Thex,ycarriage is digitised to 0.5 micron in each co-ordinate. The plate holder will accept plates up to a maximum size of 356×356 mm. The transmission of each pixel is digitised into 256 values. This gives a dynamic range in density of over 2. The zero point of the dynamic range is adjustable subject to a maximum density measurable by the machine of 3.

ISSN:0039-6265    

DOI:10.1179/sre.1980.25.195.231

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1980.25.195.235

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1980.25.195.236

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor