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Layer: IE GSI Sand and Gravel Aquifers 40k Ireland (ROI) ITM (ID: 0)

Name: IE GSI Sand and Gravel Aquifers 40k Ireland (ROI) ITM

Display Field: NAME

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>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 </SPAN></SPAN><SPAN><SPAN>–</SPAN></SPAN><SPAN><SPAN> bedrock aquifers, and sand and gravel aquifers. </SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>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. </SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>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. </SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>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:</SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>Regionally important </SPAN></SPAN><SPAN><SPAN>–</SPAN></SPAN><SPAN><SPAN> the aquifers are capable of supporting large public water supplies sufficient to support a large town; </SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>or</SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>Locally important </SPAN></SPAN><SPAN><SPAN>–</SPAN></SPAN><SPAN><SPAN> the aquifers are capable of supporting smaller public water supplies or group schemes; </SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>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.</SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>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).</SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).</SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>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.</SPAN></SPAN></P></DIV></DIV></DIV>

Service Item Id: 17c7a34d88324b9492807e8ccca1b6dd

Copyright Text: Contains Irish Public Sector Data (Geological Survey Ireland) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence.

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

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

Drawing Info: Advanced Query Capabilities:
HasZ: true

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Supported Operations:   Query   Query Attachments   Generate Renderer   Return Updates

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