Name: IE_GSI_Sand_and_Gravel_Aquifers_40K_IE26_ITM

Display Field: NAME

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Groundwater is the water that soaks into the ground from rain and can be stored beneath the ground. An aquifer is a body of rock and/or sediment that holds groundwater. There are two main types of aquifer in Ireland – bedrock aquifers, and sand and gravel aquifers. Bedrock is the solid rock at or below the land surface. Over much of Ireland, the bedrock is covered by materials such as sands and gravel. The sands and gravels occur naturally on top of the bedrock. They were laid down by meltwater from melting ice sheets, by rivers, or by wind. Not all sand and gravel layers are aquifers. This is because some of them are very thin or are dry. If the sands and gravels are saturated with water, they have the potential to supply large volumes of water through wells or springs. The Sand and Gravel aquifer map shows land areas in Ireland where sands and gravels beneath the ground contain enough groundwater to provide significant water supplies. They are classified as either:Regionally important – the aquifers are capable of supporting large public water supplies sufficient to support a large town; orLocally important – the aquifers are capable of supporting smaller public water supplies or group schemes; Geologists record information about how thick the sand and gravel layers on top of the bedrock are. They also note down how big the different grains of sand and gravel are. Information from quarries and deep pits is used. Information from boreholes (a deep narrow round hole drilled in the ground) is also used. All of the information is interpreted by a hydrogeologist and areas are drawn on a map to show the aquifers.This Sand and Gravel Aquifer map is to the scale 1:40,000 (1 cm on the map relates to a distance of 400 m).It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The aquifer data is shown as polygons. Each polygon holds information on the aquifer code, description, name, comments and confidence level associated with the delineation of the area as an aquifer.

Service Item Id: 17c7a34d88324b9492807e8ccca1b6dd

Copyright Text: Geological Survey Ireland

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 40000

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: 325515.2406
YMin: 542372.1357
XMax: 731723.8358
YMax: 951582.7156000009
Spatial Reference: 2157  (2157)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: AQUIFERDES
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
N/A
Default Label: N/A
UniqueValueInfos:
• Value: Regionally important gravel aquifer
  Label: Regionally important gravel aquifer
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [168, 0, 0, 255]
  Outline:
  N/A
• Value: Locally important gravel aquifer
  Label: Locally important gravel aquifer
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [255, 127, 127, 255]
  Outline:
  N/A
Transparency: 15
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

HasZ: true

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• SHAPE ( type: esriFieldTypeGeometry, alias: Shape )
• NAME ( type: esriFieldTypeString, alias: Gravel Body Name, length: 255 )
• AQUIFERCAT ( type: esriFieldTypeString, alias: Aquifer Category, length: 10 )
• AQUIFERDES ( type: esriFieldTypeString, alias: Aquifer Description, length: 50 )
• AQUIFERTYP ( type: esriFieldTypeString, alias: Aquifer Type, length: 10 , Coded Values: [Lg: Locally important gravel aquifer] , [Rg: Regionally important gravel aquifer] )
• NOTES ( type: esriFieldTypeString, alias: Comments, length: 255 )
• CONFIDENCE ( type: esriFieldTypeString, alias: Confidence, length: 20 , Coded Values: [High: High] , [Moderate to High: Moderate to High] , [Moderate: Moderate] , ...2 more... )
• SGAQ40KID ( type: esriFieldTypeString, alias: Aquifer Sand and Gravel Unique ID, length: 25 )
• AREA_KM2 ( type: esriFieldTypeDouble, alias: Area (km2) )
• GLOBALID ( type: esriFieldTypeGlobalID, alias: GLOBALID, length: 38 )
• SHAPE.AREA ( type: esriFieldTypeDouble, alias: SHAPE.AREA )
• SHAPE.LEN ( type: esriFieldTypeDouble, alias: SHAPE.LEN )

Supported Operations:   Query   Query Attachments   Generate Renderer   Return Updates

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