Sw Catchment (OpenData)

The SwCatchment represents the areas of terrain from which runoff from rainfall drains into a common location, whether naturally or through a piped networ, above a defined point, usually a downstream point of a watercourse. It is spatially abstracted to: an area. Entity type: Concept Projection: New Zealand Transverse Mercator (NZTM) - EPSG: 2193 Vertical datum: New Zealand Vertical Datum 2016 (NZVD2016) - EPSG: 7839

SwCatchment指位于某一指定点（通常为水道下游节点）以上的地表汇水区域，该区域内的降雨径流无论通过自然路径还是管网系统，最终均汇入同一地点。该要素的空间抽象形式为面域。实体类型：概念实体；投影坐标系：新西兰横轴墨卡托投影（New Zealand Transverse Mercator, NZTM）——EPSG:2193；垂直基准面：2016新西兰垂直基准面（New Zealand Vertical Datum 2016, NZVD2016）——EPSG:7839。