NSW Foundation Spatial Data Framework - Elevation and Depth - NSW Contours

Contours are virtual imaginary lines on the ground, joining points of an equal elevation in relation to the Australian Height Datum (AHD). A contour can be a standard contour, depression contour or an ancillary contour. It is a part of the NSW Digital Topographic Database (DTDB).

等高线（Contours）是地面上的虚拟假想线条，用于连接相对于澳大利亚高程基准面（Australian Height Datum, AHD）高程相等的各点。等高线可分为标准等高线、洼地等高线与辅助等高线三类，且为新南威尔士州数字地形数据库（NSW Digital Topographic Database, DTDB）的组成部分。