Substitute of the leveling measurement of crossing rivers with EDM triangle elevation;

Digital Leveling and Building GIS Data Management System;

Variation Characteristics of Leveling Data of Datong Central Seismological Observatory of Shanxi;

Determination of level survey admissible error;

The integrative system development on indoor and outdoor works base on PDA level survey;

By restricting side length and vertical angle of observing sides, the level survey can be replaced by the triangle elevation method so that measuring accuracy can be increased, the labor strength be reduced and the working time be saved.

Accurate analysis of total station instrument to replace leveling survey;

In this paper,the theories,techniques,methodologies,and results of monitoring primary fractures connecting to the injection well in Anpeng Alkali Mine are presented, which combines micro-seismic monitoring with leveling survey techniques.

According to Tongliao power plant water source engineering,it particular discuss basis theory and means of combine of GPS and leveling survey,availability results is obtained.

It is presented that the conclusion that total station apparatus triangulated height measurement cannot fully replace leveling surveying at every aspect through detailed analysis and the comparison between the errors of triangulated height measurement and those of leveling surveying, thus provides a reference for the method selection.

In view of the above-mentioned facts,based on a vast amount of GPS surveying data and leveling surveying data,the law of variations of GPS height anomaly of the P.

0 from Microsoft Company in the leveling surveying to reduce the workload on the field.

This paper chiefly introduces the author s development thought of the research on levelling electronic data recording system by application of SHARP PC-E500 computer.

In this paper, the formulas for calculating the astronomical correction in levelling are given.