Healthy Rivers - Lake Freshwater Management Units

Freshwater Management Units depicting lake catchments. Dune riverine, volcanic and some peat lake types were created from the NIWA REC Catchments. Not all lake FMU catchments are mutually exclusive (overlaps occur). For example; lake FMU catchment "A" can have an outflow to another larger lake FMU catchment "B" resulting in catchment "A" being contained by the larger catchment "B". An attribute - ORDER_RANK - is populated with values ranging from 1 to 3. 1’s are catchments that do not contain any other catchments within them. 2’s are catchments that contain one or more 1 catchments. 3’s are catchments that contain one or more 2 catchments. For cartographic purposes, ensure the display order follows ORDER_RANK; 1's drawn at the top of the display order, then 2's and 3's last. For analytical purposes, where two or more lake FMU catchments intersect the same polygon (ie farm property), use ORDER_RANK to determine which lake FMU catchment the polygon belongs to; 1's take primacy over 2's and 3's, while 2's take primacy over 3's. The dataset includes boundary information for the Waikato and Waipa catchments that fall within the Waikato Regional Council legal boundaries or are covered by the RCP maps. This project is co-managed under the JMAs of Ngāti Maniapoto, Raukawa, Ngāti Tūwharetoa, Te Arawa River Iwi and Waikato-Tainui as at 12 February 2012. See metadata for feature HEALTHY_RIV_FMU_LAKE in Healthy Rivers - Plan Change 1 - GIS Layer淡水管理单元（Freshwater Management Units, FMU）用于表征湖泊集水区。沙丘河流型、火山型及部分泥炭湖型集水区源自NIWA REC集水区。并非所有湖泊FMU集水区均互斥（存在重叠情况）。例如：湖泊FMU集水区"A"可向另一更大的湖泊FMU集水区"B"汇流，从而使集水区"A"被更大的集水区"B"所包含。数据集包含属性字段ORDER_RANK，其取值范围为1至3。取值为1的集水区内部不包含任何其他集水区；取值为2的集水区包含一个或多个取值为1的集水区；取值为3的集水区包含一个或多个取值为2的集水区。出于制图需求，需确保显示顺序遵循ORDER_RANK规则：取值为1的集水区优先绘制，其次为取值为2的集水区，最后为取值为3的集水区。出于分析需求，当两个或多个湖泊FMU集水区与同一多边形（即农场地块）相交时，需通过ORDER_RANK判定该多边形所属的湖泊FMU集水区：取值为1的集水区优先级高于取值为2和3的集水区，而取值为2的集水区优先级高于取值为3的集水区。本数据集涵盖怀卡托（Waikato）与怀帕（Waipa）集水区的边界信息，这些集水区要么处于怀卡托地区议会的法定管辖范围内，要么覆盖于RCP地图范围内。截至2012年2月12日，本项目由Ngāti Maniapoto、Raukawa、Ngāti Tūwharetoa、Te Arawa River Iwi及Waikato-Tainui的共同管理协议（Joint Management Agreements, JMAs）共同管理。请参阅《健康河流-计划变更1》地理信息系统（GIS）图层中要素HEALTHY_RIV_FMU_LAKE的元数据。