Measuring coordinates Small errors in the initial length measurement, would scale the whole network Because of the earth is " nearly flat, measuring angles in horizontal plane only aoWs“ horizonta| coordinates”tobe determined Another technique is needed for heights 02/11/02 12.540Lec0202/11/02 12.540 Lec 02 6 Measuring coordinates • Small errors in the initial length measurement, would scale the whole network • Because of the Earth is “nearly” flat, measuring angles in horizontal plane only allows “horizontal coordinates” to be determined. • Another technique is needed for heights