Name: Sediment Texture
Display Field: texture
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: This dataset contains interpreted polygons describing different sediment texture distribution of the Long Island Sound mapping project Phase II area. This dataset is the result of manual interpretation based on surface grab grain size analysis combined with detailed bathymetry and backscatter data.Time period of content: 2017-08-01 to 2022-10-13Data Quality Considerations: Outline of polygons is based on manual interpretation using grain size data from sediment grab analysis and mostly following backscatter boundaries.Attribute accuracy: We tried to be as accurate as possible. There were smaller areas with different backscatter signal, for which we did not had grab samples for ground verification. Changes in the backscatter values do not always correspond to the observed grain size results. In these cases, we used grain size results from grabs as the main guidance.Completeness: The dataset is complete.Positional accuracy: Polygon outlines are based on backscatter data that have 1 m pixel resolution, but interpretation could be several pixels (~ +/-10 m in each direction) of, since the exact boundary is not always clear. Small pockets of different environments might not have been distinguished. Attributes: texture: text field that describes the sediment texture class based on Schlee with additional classes added to distinguish coarser bottom types not included in the original Schlee classification:(outcrops with boulders and sand, boulder, boulder with gravel and sand, boulder with sand, gravel, gravelly sediment, sand, sand/silt/clay, silty sand, sandy silt, silty clay, no data) Area_km2: area of a polygon in square kilometer
Copyright Text: Cecilia McHugh, Frank O. Nitsche, Timothy C. Kenna, Long Island Sound Cable Fund Steering Committee
Min. Scale: 0
Max. Scale: 0
Default Visibility: true
Max Record Count: 2000
Supported query Formats: JSON, geoJSON, PBF
Use Standardized Queries: True
Extent:
XMin: -72.489041563385
YMin: 41.1698788392373
XMax: -71.8520037056646
YMax: 41.3784428881027
Spatial Reference: 4269 (4269)
Drawing Info:
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HasZ: false
HasM: false
Has Attachments: false
Has Geometry Properties: true
HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText
Object ID Field: FID
Unique ID Field:
IsSystemMaintained : True
Global ID Field:
Type ID Field: texture
Fields:
- FID (type: esriFieldTypeOID, alias: FID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
- texture (type: esriFieldTypeString, alias: texture, SQL Type: sqlTypeOther, length: 50, nullable: true, editable: true)
- area_km2 (type: esriFieldTypeDouble, alias: area_km2, SQL Type: sqlTypeOther, nullable: true, editable: true)
- Shape__Area (type: esriFieldTypeDouble, alias: Shape__Area, SQL Type: sqlTypeDouble, nullable: true, editable: false)
- Shape__Length (type: esriFieldTypeDouble, alias: Shape__Length, SQL Type: sqlTypeDouble, nullable: true, editable: false)
Types:
ID: outcrops w boulder sand
Name: outcrops w/ boulder & sand
Domains:
Templates:
Name: outcrops w/ boulder & sand
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
Attributes:
- texture: outcrops w boulder sand
ID: boulder
Name: boulder
Domains:
Templates:
Name: boulder
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
ID: boulder w gravel sand
Name: boulder w/ gravel & sand
Domains:
Templates:
Name: boulder w/ gravel & sand
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
Attributes:
- texture: boulder w gravel sand
ID: gravel
Name: gravel
Domains:
Templates:
Name: gravel
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
ID: gravelly sed
Name: gravelly sediment
Domains:
Templates:
Name: gravelly sediment
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
ID: boulder w sand
Name: boulder w sand
Domains:
Templates:
Name: boulder w sand
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
ID: sand
Name: sand
Domains:
Templates:
Name: sand
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
ID: silty sand
Name: silty sand
Domains:
Templates:
Name: silty sand
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
ID: sand/silt/clay
Name: sand/silt/clay
Domains:
Templates:
Name: sand/silt/clay
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
ID: sandy silt
Name: sandy silt
Domains:
Templates:
Name: sandy silt
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
ID: silty clay
Name: silty clay
Domains:
Templates:
Name: silty clay
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
ID: no data
Name: no data
Domains:
Templates:
Name: no data
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
Is Data Versioned: false
Has Contingent Values: false
Supports Rollback On Failure Parameter: true
Last Edit Date: 12/19/2024 6:50:10 PM
Schema Last Edit Date: 12/19/2024 6:50:10 PM
Data Last Edit Date: 12/19/2024 6:50:10 PM
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