This paper introduces the applied Global Position System (GPS)、Remote System (RS) and Geography Information System (GIS)(called"3S") techniques as representative surveying and mapping of the modern digital technique system, carrying 1:2000 scale lands make use of the product of the present condition inquiry to carry out the process on YiWu of Zhejiang Province.
The purpose of this paper is to summarize the courses of national land surveying and monitoring, the objective, technique frameand core problems were put forward.
The no staff and self-reducing tacheometer is a new type of surveying instrument designed and constructed by a group of teachers and students of our department. This instrument can be used for topographic and tacheometric measurements with low degree of accuracy for geographic and geological details, and also for land and forest valuations. The most distinguished advantage of this instrument lies in the fact that there is no necessity to place a staff at the point to be sighted, and the horizontal di...
The transformation of old coordinates to new ones is a common problem in city surveying. To solve this problem, it is necessary not only to consider the relationship caused by the difference of the method of projection, by that of the elements of ellipsoids and by that of the original data between the new and the old coordinates, but also to consider the observation errors caused by the two measurements. To ensure the precision of the mathematical relationship, the present paper has adopted the least ...
In this paper,firstly,the authors studied some of the problems concerning laser align- ment,which include:the laws of the image formed by round zone plate,atmospheric effect on laser alignment and main points in designing laser source and detector.Secondly, they described the Laser Alignment Instrument developed by the Engineering Surveying Laboratory in our College and its use in the measurement of the horizontal deformation of large dams.The conclusions are as follows: a)Laser alignment using round ...