Drainage Open Drain

This layer shows location of drainage open drains within the Metropolitan Region and is provided for information only. An Open drain is defined as a link in the drainage network. It includes different types of table drains, swale, and living stream etc. It can be owned by Main Roads WA or others. Data dictionary: Field Alias Type Description Pipe_No Pipe No String “Road_No” & ”.“ & Unique Database Number e.g. H015.569 Asset_Owner Asset Owner String Owner of the asset e.g. Main Roads Road_No Road No String MRWA Road Number Asset_Status Asset status String Functionality of asset (Operational or Non-operational Data_Status Data Status String Field survey verification e.g. Verified / Asset Captured via Desktop only Pipe_Type Pipe Type String Pipe Type (Open Drain) Length Pipe Length Double Pipe/Open drain section length in metres Diameter_Width Diameter/Width Long Pipe/Open drain Diameter or Width if a culvert or non-circular in mm Up_IL Upstream Invert Double Upstream end of pipe/open drain Invert Level in metres Dn_IL Downstream Invert Double Downstream end of pipe/open drain Invert Level in metres Mapping_Comments Mapping Comments String Any additional comments that relate to this pipe/open drain section including assumptions Confidence_Rating Confidence Rating String A confidence level assigned based on the source data used to digitise the feature Disclaimer: 1. Please note that Main Roads WA drainage data is provided for information only and the data may be inaccurate, incomplete or out-of-date. Please use as a reference only and verification is to be undertaken on site. 2. Confidence Rating has been assigned to individual assets to provide an indication of the accuracy of the data. However please note that this is only an estimated rating which should be used as a reference only. 3. Asset Owner – Please note that Main Roads WA drainage data includes multiple organisations’ interface drainage and, as a result, the ‘Asset Owner’ attribute is only to be used as a reference only as it may be inaccurate and should not be referred to as the source of truth. 4. Asset Types: a. Interfacing Structures i. Note that the drainage data includes interface points between Main Roads WA drainage structures and structures owned by other asset owners. However not all assets owned by other asset owners have been included. Please seek clarification from the respective asset owners if required. b. Ghost Link i. Ghost link can be used to represent an interfacing drainage network not owned by Main Roads WA. These are commonly used to simplify complex networks located downstream on route to the ultimate stormwater outlet destination.

本图层展示了大都会区域内露天排水渠（Open drains）的位置，仅供参考。露天排水渠（Open drain）被定义为排水网络中的链路，涵盖各类明渠、滞洪洼地以及天然溪流等。其管护主体可为西澳主干道局（Main Roads WA）或其他机构。
数据字典：字段名、字段别名、数据类型及说明如下：
Pipe_No：别名Pipe No，字符串型，说明为由「Road_No」与「.」拼接唯一数据库编号而成，例如H015.569
Asset_Owner：别名Asset Owner，字符串型，说明为资产管护主体，例如西澳主干道局（Main Roads WA）
Road_No：别名Road No，字符串型，说明为西澳主干道局道路编号
Asset_Status：别名Asset status，字符串型，说明为资产运行状态（可运行或不可运行）
Data_Status：别名Data Status，字符串型，说明为野外测绘验证情况，例如已验证/仅通过桌面端采集
Pipe_Type：别名Pipe Type，字符串型，说明为管道类型（露天排水渠）
Length：别名Pipe Length，双精度浮点数型，说明为管道/露天排水渠段长度，单位：米
Diameter_Width：别名Diameter/Width，长整型，说明为管道/露天排水渠的直径或宽度（若为涵洞或非圆形截面），单位：毫米
Up_IL：别名Upstream Invert，双精度浮点数型，说明为管道/露天排水渠上游端的管底高程，单位：米
Dn_IL：别名Downstream Invert，双精度浮点数型，说明为管道/露天排水渠下游端的管底高程，单位：米
Mapping_Comments：别名Mapping Comments，字符串型，说明为与该管道/露天排水渠段相关的补充说明，包括各项假设条件
Confidence_Rating：别名Confidence Rating，字符串型，说明为基于数字化采集该要素所使用的源数据所赋予的置信等级
免责声明：
1. 请注意，西澳主干道局（Main Roads WA）提供的排水数据仅供参考，该数据可能存在不准确、不完整或过时的情况。请仅将其作为参考依据，并需在现场进行验证。
2. 已为各单个资产赋予置信评级，以体现数据的准确程度。但请注意，该评级仅为估算值，仅可作为参考使用。
3. 资产所有者：请注意，西澳主干道局（Main Roads WA）的排水数据涵盖了多机构的接口排水设施，因此「资产所有者」属性仅可作为参考，其信息可能不准确，不应作为权威依据。
4. 资产类型：
a. 接口结构
i. 请注意，本排水数据包含西澳主干道局（Main Roads WA）排水设施与其他资产所有者所有的设施之间的接口点，但未纳入其他资产所有者拥有的全部设施。如有需要，请向相应的资产管护机构咨询确认。
b. 虚链路（Ghost Link）
i. 虚链路可用于表示不属于西澳主干道局（Main Roads WA）所有的接口排水网络，通常用于简化最终通往雨水排放口的复杂下游管网。