Accuracy analysis and approaches of total station triangle elevation surveying
Jiangtao Yang · Journal of Northwest A&F University · 2008
【Objective】 The research on the advantages and disadvantages,applying conditions and ranges of each total station triangle elevation surveying approach to replace water leveling survey provides a theoretical basis for choosing the most appropriate survey method in the practical work.【Method】 From the three approaches of Triangle Elevation Surveying by using total station:single-direction observation,double-direction observation and midway method,three calculation formulas were deducted based on some surveying principles.Then after error analysis,the error transmission principle was applied to figure out the error formulas respectively and then a contrastive analysis was made for each elevation survey accuracy upon the impact of various factors.【Result】 The analysis results show that if Triangle Elevation Surveying by using total station was applied within certain reasonable ranges,the observation result could reach the water leveling survey measurements of grade three or grade four specifications,among which double-direction observation accuracy was the highest,the midway method the second,and the single-direction observation the poorest.【Conclusion】 To conclude,this Triangle Elevation Surveying is a rather simple and quick method that it can provide a new access to build up a height controlling network.