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.
Feature Type: Polygon
Type: FeatureLayer
Display Field: N/A
Primary Key Field: OBJECTID
Show Map Tips: True
Searchable: False
Identifiable: True
Queryable: True
Can Copy Feature: True
Snappable: True
Snapping Enabled: False
Has Attachments: False
Feature Label: <b>Unstable Slopes</b>
Feature Description: <span style="font-style: italic;">All Critical Areas maps are reference tools only. There may be buffers associated with these features and they are not final determinations. For more information on how Critical Areas affect your parcel, please contact a Critical Areas Planner at <a href="mailto:planningdept@islandcountywa.gov?subject=ICGeoMap Critical Areas Question" style="">planningdept@islandcountywa.gov</a></span> <div><br/></div><div><span style="font-weight: bold;">Slope Class: </span>{SLP_CLASS}<div style=""><span style="font-weight: bold;">Location:</span> {LOCATION}</div><div style=""><span style="font-weight: bold;">Acres:</span><span style="font-weight: normal;"> {ACRES}</span></div><div style="font-weight: normal;"><br/></div></div>
Feature Long Description: N/A
Feature Zoom Factor: N/A
Feature Zoom Scale: N/A
Feature Border Color: N/A
Feature Border Width: N/A
Feature Fill Color: N/A
Icon: N/A
Include in Layer List: True
Include in Legend: True
Can Toggle Labels: True
Show Labels: True
Allow Symbolization: True
Draw Index: 6
Legend URL: N/A
Style Name: N/A
Data Provider: Default
Time Zone ID: N/A
Fields:
OBJECTID (Type: Int32, Visible: False, Searchable: False, Can Symbolize Unique Value: True, Can Symbolize Class Breaks: True, Addressable: True)
SLP_CLASS [Slope Class] (Type: String, Visible: True, Searchable: False, Can Symbolize Unique Value: True, Can Symbolize Class Breaks: True, Addressable: True)
LOCATION [Location] (Type: String, Visible: True, Searchable: False, Can Symbolize Unique Value: True, Can Symbolize Class Breaks: True, Addressable: True)
ACRES [Acres] (Type: Double, Visible: True, Searchable: False, Can Symbolize Unique Value: True, Can Symbolize Class Breaks: True, Addressable: True)
HECTARES [Hectacres] (Type: Double, Visible: True, Searchable: False, Can Symbolize Unique Value: True, Can Symbolize Class Breaks: True, Addressable: True)
MAPPLATE_ [MapPlate] (Type: String, Visible: True, Searchable: False, Can Symbolize Unique Value: True, Can Symbolize Class Breaks: True, Addressable: True)
Shape (Type: Object, Visible: False, Searchable: False, Can Symbolize Unique Value: False, Can Symbolize Class Breaks: False, Addressable: True)
Layer Hyperlinks:
About this layer (https://maps.islandcountywa.gov/WebFiles/DataDownloads/Metadata/UnstableSlopes.html)