Comparative Analysis of Leveling Instruments Wild NA3000 and Zeiss Ni-1

摘要

This study is a comparative analysis of leveling instruments in the verticalcontrol survey conducted on the Dhahran Test Range in Saudi Arabia. The vertical leveling observations for first-order were obtained using Zeiss Ni-1 and Wild NA3000 leveling instruments. The vertical control network was adjusted using a least square program developed at the United States National Geodetic Survey, (NGS). Vertical control, Optic level, Digital electronic image processing to determine height and distance.