Topography Spot Elevations

The dataset contains DTM masspoints derived photogrammetrically to support 2’ contours. This data is used for the planning and management of Washington, D.C. by local government agencies.本数据集包含通过摄影测量方式获取的数字地形模型（Digital Terrain Model）离散测点，用于支撑2英尺等高线的制作。该数据集可供华盛顿哥伦比亚特区的地方政府机构开展规划与管理工作时使用。