This study is to compare the error tolerance on regulation of public surveying between orthometric height of control point by direct leveling and geoidal height of GPS/Leveling using Network GPS in order to analysis the accuracy of Network GPS. As a r...
This study is to compare the error tolerance on regulation of public surveying between orthometric height of control point by direct leveling and geoidal height of GPS/Leveling using Network GPS in order to analysis the accuracy of Network GPS. As a result of compared with direct leveling of orthometric height in leveling net that combination of unified control point and bench mark error was maximum -0.068m, minimum 0.002m. The orthometric height value was different according to net compose of application that in case of combination unified control point and bench mark were grade 3 to 4 each 4point and 7point.
Also, in order to calculate geometric height of public reference point, I calculate geoid height national geoid model and GPS levelling. As a result of comparison and analysis of computed geometric height and noticed performance. The results shows that levelling of Network GPS is a reliable result. Therefore, it may extract the survey result of direct leveling with equal height result as this study of comprehensive conclusion that nation control point from distribution chart can be composed optimum leveling net.