摘要:

AbstractThis paper describes a programme directed towards accelerating the issue of title deeds to all landholders and improving the cadastral system in Thailand. Following preparatory investigations, the World Bank and the Australian Development Assistance Bureau (ADAB) have been approached to give assistance during an initial five-year implementation phase. The programme aims to complete the issue of title deeds within 20 years. The Royal Thai Government (RTG), which initiated the programme, is giving it a high priority because it expects the increased security of tenure to lead to improved farming methods, increased agricultural productivity and other socio-economic benefits.Under the proposed programme, the Department of Lands will produce a new cadastral mapping series at 1 : 4000, based on rectified photomaps. Control will be on the UTM system, related to the geodetic networks. Title deeds will be issued for all privately-owned land parcels which lack them, and State-owned parcels will be brought onto the register. Surveying and adjudication methods will be similar to the present procedures for title deed surveys, but new technology will be phased in during the project, where it can avoid bottlenecks. The programme also encompasses an urban mapping project, decentralisation of Land Offices, development of the National Valuation Authority, a programme of technical aid, education and training, provision of additional buildings and some increases in staffing levels.

ISSN:0039-6265    

DOI:10.1179/sre.1985.28.215.2

出版商:Taylor&Francis    

年代:1985

数据来源: Taylor

摘要:

AbstractUnbiased estimation of variance-covariance components are studied in the condition adjustment model. Estimators are given that avoids the computation of the least squares residuals. Among these estimators the most efficient one (the local BQUE) is derived and tested against other estimators of the variance of unit weight in an open chain of triangulation. In the example the new estimator has practically the same variance as the BQUE for any number of triangles.

ISSN:0039-6265    

DOI:10.1179/sre.1985.28.215.15

出版商:Taylor&Francis    

年代:1985

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1985.28.215.24

出版商:Taylor&Francis    

年代:1985

数据来源: Taylor

摘要:

AbstractIn this paper a sample solution of the second fundamental problem of geodesy is proposed. Employing a methodology based on the geometrical quadrature of segments of the normal section, we obtain a sample algorithm and a good accuracy, superior to the other approximate methods. With this method we can obtain an error in the order of one metre in 3,000Km. A rapid solution is possible using a pocket calculator.

ISSN:0039-6265    

DOI:10.1179/sre.1985.28.215.25

出版商:Taylor&Francis    

年代:1985

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1985.28.215.32

出版商:Taylor&Francis    

年代:1985

数据来源: Taylor

摘要:

AbstractReadjustment of a traverse network is a typical example of a problem in which there are extremely large differences in the observations' weights. Because of these differences the matrix of the normal equations is sometimes ill-conditioned. This paper presents an alternative method for performmg a rigorous adjustment without forming and inverting the conventional normal equations matrix.

ISSN:0039-6265    

DOI:10.1179/sre.1985.28.215.33

出版商:Taylor&Francis    

年代:1985

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1985.28.215.40

出版商:Taylor&Francis    

年代:1985

数据来源: Taylor

摘要:

AbstractGravimetric geoid separation values derived using mean gravity anomalies in the usual Stokes integration are compared with values obtained using a combined solution of the Stokes integration with the Molodenskii truncation procedure. Mean gravity anomalies were obtained from surface gravity data for the near zones and the Rapp (1977, 1978) l°×1°and 5°equal area mean anomalies were used for the outer zones in the Stokes integration. The potential coefficients required in the Molodenskii truncation were obtained from GEM-lOB data. Using two values of the radius of the spherical cap represented by the Stokes integration in the combined solution (ψ0= 5°and0°) the comparisons are made at 110 one degree geographical grid points situated in South Australia. The results show in both cases a systematic mean difference of approximately 0.5 m with RMS's about this mean forψ0= 5°and 0°of 0.6 m and 1.8 m respectively.

ISSN:0039-6265    

DOI:10.1179/sre.1985.28.215.41

出版商:Taylor&Francis    

年代:1985

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1985.28.215.47

出版商:Taylor&Francis    

年代:1985

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1985.28.215.48

出版商:Taylor&Francis    

年代:1985

数据来源: Taylor