Parent Layer: Overland Flow Paths 2017

Name: Depression Storage Areas 2017

Display Field: Min_Depth

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Surface depressions can be mapped to define zones of potential inundation should the primary network become blocked.Depressions can be delineated under the assumption that these areas would fill to capacity prior tospilling. To qualify for inclusion in the depression’s dataset, individual depressions need to meet the following setof criteria relating footprint area, storage volume and maximum depth. Surface area > 100 m2 Maximum depth > 0.20 m Volume > 30 m3The Field "Valid_Depression" can be used to identify those depression features that meet the above criteriaDisclaimerThis overland flow path layer provides a high-level understanding of routes where surface stormwater may flow during rainfall events. It is subject to the following limitations:The layer uses a surface generated by LiDAR only and does not account for the stormwater reticulation network or for any surface obstructions such as buildings or fences.The layer is subject to limitations in the LiDAR data. These include lower precision under dense foliage and lack of LiDAR data in some rural areas in the District.The layer is generated through a GIS algorithm which divides terrain into a grid of squares. Water is modelled to flow from each grid square to the lowest adjacent grid square. This method means that fine features such as kerbs may not be accurately represented.The layer does not include any assessment of depth, width, or rate, of flows.In some locations, change to landform since LiDAR was generated will have altered overland flow paths from those displayed on the layer.These limitations mean that overland flow paths represented on the layer should not be considered definitive and are subject to further investigation. Likewise, flow paths that exist in reality, may not be represented on this layer.A draft disclaimer for the depression storage layer is provided as follows for your consideration.The depression storage layer provides an indicative extent of where ponding may form during prolonged rainfall.It is subject to the following limitations:It is assumed that the depression storage areas shown would fill to capacity prior to spillingThe depression storage areas shown exceed the following minimum criteria regarding ponding area, storage volume and depth.Surface area > 100 m2 Maximum depth > 0.20 m Volume > 30 m3The layer uses a surface generated by LiDAR only and is subject to the limitations of LiDAR. In some locations, change to landform since LiDAR was generated will have altered the potential depression storage area from those displayed on the layer.

Service Item Id: 7a9fc3d738ea4b5a9611e1b7ca8170e8

Copyright Text: Morphum Environmental 2019

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 20000

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: 1708161.9330000002
YMin: 6008380.9601
XMax: 1742490.0365000004
YMax: 6057073.0538
Spatial Reference: 2193  (2193)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: Valid_Depression
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
N/A
Default Label: N/A
UniqueValueInfos:
• Value: YES
  Label: Depression Storage Areas
  Description: N/A
  Symbol:
  Style: esriSFSBackwardDiagonal
  Color: [0, 197, 255, 255]
  Outline:
  Style: esriSLSSolid
  Color: [55, 149, 200, 255]
  Width: 2
Transparency: 0
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• Min_Depth ( type: esriFieldTypeString, alias: Minimum Depth in meters, length: 200 )
• Max_Depth ( type: esriFieldTypeString, alias: Maximum Depth in meters, length: 200 )
• Surface_Vol ( type: esriFieldTypeString, alias: Surface Volumn m3, length: 200 )
• Valid_Depression ( type: esriFieldTypeString, alias: Valid Depression, length: 200 )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• Shape.STArea() ( type: esriFieldTypeDouble, alias: Shape.STArea() )
• Shape.STLength() ( type: esriFieldTypeDouble, alias: Shape.STLength() )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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