Name: IE_GSI_Quaternary_Geomorphology_Subglacial_Lineation_Large_50K_IE26_ITM

Display Field: GL_TYPE

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: In terms of time scale in geology, Quaternary is the present-day time and it began 2.6 million years ago. A lot of this time period relates to the Ice Age. Quaternary geomorphology is the record of landscape features that were created in the last 2.6 million years. In Ireland, movement of glaciers and ice sheets created many of these features. Subglacial landforms are created beneath the ice. They were created during ice expansion. Crags are formed when a glacier or ice sheet passes over an area that contains a particularly strong rock. The force of the glacier erodes the surrounding softer material, leaving a rocky streamlined hill (crag). The crag often serves as a partial shelter to softer material in the aftermath of the glacier. A tapering tail of material is often left behind on the down-ice side of the crag. Where the tail is formed of weaker rock, the feature forms a streamlined bedrock ridge.Drumlins are smooth, oval-shaped hills, shaped like a half-buried egg. They are made up of glacial till. As the glaciers retreated, they left these deposits behind. The exact process of drumlin formation is unknown.Mega-scale glacial lineations, like drumlins, are typically smooth hills of subglacially-deposited material, but are much longer. They are produced beneath zones of fast-flowing ice.Geologists map and record evidence during field visits, from air photographs and from Digital Elevation Models (DEMs). Lines are drawn on a map to show where features are found. We collect new data to update our map and also use data from other sources.This map shows the currently mapped large Subglacial Lineations in Ireland.This map is to the scale 1:50,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 500m.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The data is shown as lines. Each line holds information on the glacial landform type, data source, data reference and its unique identifier.

Service Item Id: 78c491406a0d4651ba11a9da99a29942

Copyright Text: Geological Survey Ireland

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 400001

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: true

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: 435835.590700003
YMin: 520182.12600001297
XMax: 734057.2002000021
YMax: 946958.4382000121
Spatial Reference: 2157  (2157)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: GL_TYPE
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
N/A
Default Label: N/A
UniqueValueInfos:
• Value: Crag-and-Tail
  Label: Crag-and-Tail
  Description: N/A
  Symbol:
  Style: esriSLSSolid
  Color: [255, 255, 255, 255]
  Width: 0
• Value: Drumlin
  Label: Drumlin
  Description: N/A
  Symbol:
  Style: esriSLSSolid
  Color: [230, 0, 169, 255]
  Width: 0
• Value: Mega Scale Glacial Lineation
  Label: Mega Scale Glacial Lineation
  Description: N/A
  Symbol:
  Style: esriSLSSolid
  Color: [217, 147, 192, 255]
  Width: 1
• Value: Streamlined Bedrock
  Label: Streamlined Bedrock
  Description: N/A
  Symbol:
  Style: esriSLSSolid
  Color: [78, 78, 78, 255]
  Width: 0
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

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• SHAPE ( type: esriFieldTypeGeometry, alias: SHAPE )
• SGLINID ( type: esriFieldTypeString, alias: Subglacial Lineation Unique ID, length: 30 )
• GL_TYPE ( type: esriFieldTypeString, alias: Glacial Landform Type, length: 50 , Coded Values: [Composite Thrust Block Moraine: Composite Thrust Block Moraine] , [Corrie: Corrie] , [Crag-and-Tail: Crag-and-Tail] , ...23 more... )
• DATASOURCE ( type: esriFieldTypeString, alias: Data Source, length: 254 )
• DATA_REF ( type: esriFieldTypeString, alias: Data Reference, length: 254 )
• GLOBALID ( type: esriFieldTypeGlobalID, alias: GLOBALID, length: 38 )
• SHAPE.LEN ( type: esriFieldTypeDouble, alias: SHAPE.LEN )

Supported Operations:   Query   Query Attachments   Generate Renderer   Return Updates

  Iteminfo   Thumbnail   Metadata