Map ORR Digital Elevation Model 2m 1993

This Digital Elevation Model (DEM) of the Oak Ridge Reservation has a 2m spatial resolution and an error of +/- 2.32m (1:2,400scale). Melanie Harris (Qsystems) created the DEMs from a Digital Terrain Model (DTM) created from aerial photography taken during leaf-off in April of 1993. The aerial photographs were flown at 7200' Above Ground Level resulting in a nominal scale of 1:14400. The data were compiled at 1:2,400 scale (1=200') yielding the +/- 2.32m error. The original DTM was created as part of the DOE Basemapping and Imagery project for the Oak Ridge Environmental Restoration program.本橡树岭保留地的数字高程模型（Digital Elevation Model，DEM）空间分辨率为2米，误差范围为±2.32米，制图比例尺为1:2400。梅兰妮·哈里斯（Qsystems公司）以1993年4月落叶期拍摄的航空影像生成的数字地形模型（Digital Terrain Model，DTM）为基础，制作了该DEM数据。本次航空摄影的飞行离地高度为7200英尺，对应名义比例尺为1:14400。数据以1:2400的比例尺（即1英寸对应200英尺）进行编绘，由此产生了±2.32米的误差范围。原始数字地形模型是为橡树岭环境修复项目实施的美国能源部基础制图与影像项目的组成部分。