Name: Unstable Slopes

Display Field: SLPCLASS

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The digital maps presented here were originally published as hard copy maps in the Coastal Zone Atlas of Washington between 1978 and 1980. Although the Atlas has been out of print for many years, the maps contain information that remain the basis for local planning decisions. After receiving multiple requests for electronic versions of portions of the Atlas, an effort was made to scan, georeference and digitize aspects of the Atlas, beginning with the slope stability maps. These maps indicate the relative stability of coastal slopes as interpreted by geologists based on aerial photographs, geological mapping, topography, and field observations. Such methods are standard, but may occasionally result in some unstable areas being overlooked and in some stable areas being incorrectly identified as unstable. Further inaccuracies are introduced to the data through the process of converting the published maps into digital format. Important land use or building decisions should always be based on detailed geotechnical investigations. This mapping represents conditions observed in the early and mid-1970s. Shorelines and steep slopes are dynamic areas and many landslides have occurred since that time that are not reflected on these maps. Subsequent human activities may have increased or decreased the stability of some areas.

Copyright Text: Washington State Department of Ecology, Shorelands and Coastal Zone Management Program

Default Visibility: false

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

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Supports Advanced Queries: true

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Has Labels: true

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Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: 1150892.0426205546
YMin: 333755.1311710626
XMax: 1269003.0960961431
YMax: 519801.4496944696
Spatial Reference: 102748  (2285)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: SLP_CLASS
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
N/A
Default Label: N/A
UniqueValueInfos:
• Value: Unstable slope
  Label: Unstable slope
  Description: N/A
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  Style: esriSLSSolid
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• Value: Unstable-old slide
  Label: Unstable-old slide
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  Style: esriSLSSolid
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  Label: Unstable-recent slide
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Labeling Info:
Label Placement: esriServerPolygonPlacementAlwaysHorizontal
Label Expression: [SLP_CLASS]
Use Coded Values: true
Symbol:
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Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
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HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• SLP_CLASS ( type: esriFieldTypeString, alias: Slope Class, length: 100 )
• LOCATION ( type: esriFieldTypeString, alias: Location, length: 100 )
• ACRES ( type: esriFieldTypeDouble, alias: Acres )
• HECTARES ( type: esriFieldTypeDouble, alias: Hectacres )
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• Shape ( type: esriFieldTypeGeometry, alias: Shape )

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

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