Geological map of FURUBOTNABBEN, Heimefrontfjella, Antarctica (Scale 1:25,000)

Topographic data of this geological map were obtained through stereoscopic aerial photo interpretation. The photogrammetric photo flights were undertaken in 1986 by the Institut für Angewandte Geodäsie, Frankfurt. Horizontal ground control points required for aerial photo interpretation were determined by means of Doppler satellite observation during the 2nd German Neuschwabenland Expedition 1985/86. Vertical ground control points were taken from unpublished map drafts at 1:100 000 scale by Norsk Polarinstitutt, Oslo. The elevation above mean sea level was transferred to Heimefrontfjella barometrically. For this reason assertions concerning the absolute elevation (referred to sea level) are uncertain. Contours and spot heights presented on the map were obtained from the photogrammetric evaluation of the photography taken in 1986; relative elevation data (hight differences) are accurate to approximately ±10 m.本地质图的地形数据通过立体航空像片解译获取。1986年，法兰克福应用大地测量研究所（Institut für Angewandte Geodäsie）开展了航空摄影测量飞行作业。航空像片解译所需的地面平面控制点，由1985/1986年第二届德国新施瓦本远征队通过多普勒卫星观测测定。地面高程控制点则取自挪威极地研究所（Norsk Polarinstitutt，奥斯陆）未公开的1:10万比例尺地图草图。海姆弗伦特山脉（Heimefrontfjella）的平均海平面以上高程通过气压测量法推算得到，因此基于平均海平面的绝对高程相关表述存在不确定性。本图所载的等高线与单点高程数据，均源自1986年航空摄影的摄影测量解译成果；相对高程数据（高差）的精度约为±10米。