Directory of Important Wetlands in Australia (DIWA) Spatial Database

This is a polygon coverage representing the wetlands cited in the "A Directory of Important Wetlands in Australia" Third Edition (EA, 2001), plus various additions for wetlands listed after 2001.

This coverage is a compilation of various data sources and has been collected using a variety of methods. This dataset should therefore be used as an indicative guide only to wetland boundaries and locations. The data has been collated by the Australian Government Department of the Environment from various datasets including those supplied by the relevant State agencies.

State agency contributors include the Queensland Environmental Protection Authority, NSW Department of Environment and Conservation and the Victorian Department of Sustainability and Environment.

For the identification of wetland boundaries or locations in regard to the compliance of activities with relevant State legislation, the relevant State authority should be contacted to obtain the most recent and accurate wetland boundary information available.

The criteria for the definition of a wetland used in this dataset is that adopted by the Ramsar Convention, namely: "areas of marsh, fen, peatland or water, whether natural or artificial, permanent or temporary, with water that is static or flowing, fresh, brackish or salt, including areas of marine water the depth of which at low tide does not exceed six meters."

Attributes in the dataset include:

WNAME: the name of the wetland site as listed in the Directory.

REFCODE: an individual reference number including a cross reference to the State in which it occurs. The first 2-3 characters relate to the State or Territory of origin followed by the 3 digit sequential wetland numeric code. (eg. "NSW001": NSW=New South Wales; 001=wetland number).

SOURCE: the data source for the polygon.

FEAT_CODE: description of the waterbody's hydrographic feature (eg. 'lake', 'swamp'). This attribute is derived from the TOPO250K.WATERBOD coverage.

STATE: the State or Territory in which the waterbody occurs.

SUPPLY_BY: the name of the agency that supplied the boundary of a wetland and date of supply to the Department

This data was updated on 23/03/2010. The wetlands of "Lake Cowal/Wilbertroy Wetlands" (Refcode: NSW040) has an additional small polygon about 600 km away. It is considered as an error. This additional small polygon was removed.

本数据集为多边形覆盖数据，涵盖《澳大利亚重要湿地名录》第三版（EA, 2001）中提及的湿地，以及2001年后新增列入的各类湿地。

本覆盖数据集整合了多源数据，并通过多种方法采集完成。因此，本数据集仅可作为湿地边界与位置的参考指引。

该数据集由澳大利亚联邦环境部从各类数据集整理汇编而成，其中包括相关州级机构提供的数据。

参与数据提供的州级机构包括昆士兰州环境保护局、新南威尔士州环境与保护部，以及维多利亚州可持续与环境部。

若需依据相关州级法规核查活动合规性并确认湿地边界或位置，应联系相应州级主管部门，以获取最新且准确的湿地边界信息。

本数据集所采用的湿地定义，采用拉姆萨尔公约（Ramsar Convention）的标准，即："无论天然或人工、永久或临时的沼泽、沼原、泥炭地或水域地带，其水体静止或流动、淡水、咸淡水或咸水，包括低潮时水深不超过6米的海域区域。"

数据集中包含以下属性字段：
WNAME：名录中记载的湿地场地名称。
REFCODE：唯一参考编号，包含其所在州的交叉引用信息。编号前2至3位代表来源州或领地，后续3位为湿地的连续数字编码（例如"NSW001"：NSW代表新南威尔士州；001为湿地序号）。
SOURCE：该多边形的数据来源。
FEAT_CODE：水体水文特征的描述（例如"lake"（湖泊）、"swamp"（沼泽））。该属性源自TOPO250K.WATERBOD覆盖数据集。
STATE：该水体所在的州或领地。
SUPPLY_BY：提供湿地边界数据的机构名称，以及向澳大利亚联邦环境部提交该数据的日期。

本数据集于2010年3月23日完成更新。原"考阿尔湖/威尔伯特罗伊湿地"（参考编号：NSW040）附带了一处距其约600公里的小型冗余多边形，经判定为数据错误，该冗余多边形已被移除。