Comparative Analysis of Leveling Instruments Wild NA3000 and Zeiss NI-1
ARMY TOPOGRAPHIC ENGINEERING CENTER ALEXANDRIA VA
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This study is a comparative analysis of leveling instruments in the vertical control 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.