NSW Foundation Spatial Data Framework - Elevation and Depth Theme Profile

Elevation and Depth is the measurement of the Earth’s surface above or below a vertical datum to obtain the height of the land.\r\nData is collected using a range of sensors including: laser, sonar, radar and optical.\r\nTechnical methodologies are used to derive spot heights, raster surfaces, contours, triangulated irregular networks and digital elevation models.

高程与水深（Elevation and Depth）是指以垂直基准面为参照，测量地球表面相对该基准面的高低位置，以获取陆地高程与水下深度的技术手段。
该类数据可通过多种传感器采集，包括激光传感器、声呐传感器、雷达传感器与光学传感器。
可通过专业技术方法生成测点高程、栅格表面、等高线、不规则三角网（Triangulated Irregular Network）以及数字高程模型（Digital Elevation Model）等数据成果。