Hubbard Brook Experimental Forest 10ft contours: GIS Shapefile

Diazo copy of Hubbard Brook Watershed Map generated stereophoto- grammetrically based on May, 1956 aerial photography. Shows New Hampshire state plane coordinate system reference points which were projected into UTM Zone 19 and used as reference tics. The contour lines were manually digitized from the map. Data distributed as shapefile in Coordinate system EPSG:26919 - NAD83 / UTM zone 19N

本数据集为基于1956年5月航空摄影成果、通过立体摄影测量方法生成的哈伯德溪流域地图重氮复制件。该地图标注有新罕布什尔州平面坐标系参考点，此类参考点已投影至通用横轴墨卡托（Universal Transverse Mercator, UTM）第19带，并被用作参考格网。地图中的等高线均由人工从原图数字化提取而来。本数据集以形状文件（Shapefile）格式分发，采用的坐标系为EPSG:26919——NAD83/UTM第19北带。