Name: Shallow Areas

Display Field: Descript

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This dataset encompasses portions of California and Nevada surrounding Lake Tahoe. TRPA derived a new GIS data layer that outlines the nearshore littoral drift splash zone around Lake Tahoe. The purpose of this task is to inform the Littoral Sediment Loading standard that is a part of the Water Quality Threshold Evaluation. The adopted TRPA Threshold Standard aims to decrease sediment load as required to attain turbidity values not to exceed three Nephlometric Turbidity Units (NTU) and not exceed one NTU in shallow waters of Lake Tahoe not directly influenced by stream discharges. The littoral drift splash zone GIS layer was outlined based on the interpretation of 2012-2013 ortho-rectified aerial photographs (NAIP, USDA) and in comparison to other informative GIS datasets that were available. Basically, areas were delineated along the shoreline where sand was visible in the nearshore and then these areas were enclosed based on the presence of steep slopes. Aerial imagery issues related to glare and shade necessitated the incorporation of several aerial photograph sources such as the 2012-2013 NAIP USDA Aerials and other TRPA imagery resources. The nearshore bathymetry data from USGS proved useful for detecting steeply sloping bathymetry (http://tahoe.usgs.gov/bath.html).

Service Item Id: 741f9dd0553c4e409b01d40a11cc2a8d

Copyright Text:

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

Extent:

XMin: -120.17012435384433
YMin: 38.9345865703356
XMax: -119.92302038050106
YMax: 39.25310896692793
Spatial Reference: 4326  (4326)

Drawing Info:

Renderer:
Simple Renderer:
Symbol:
Style: esriSFSSolid
Color: [132, 215, 221, 255]
Outline:
Style: esriSLSSolid
Color: [110, 110, 110, 255]
Width: 0
Label: N/A
Description: N/A
Transparency: 50
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
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false
Supports Percentile Statistics: true
Supports Having Clause: true
Supports Count Distinct: true
Supports Time Relation: true
Supports Sql Format: false
Supports Query Analytic: true
Supports Query With Current User: true

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• Descript ( type: esriFieldTypeString, alias: Descript, length: 50 )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• GlobalID ( type: esriFieldTypeGlobalID, alias: GlobalID, length: 38 )
• created_user ( type: esriFieldTypeString, alias: created_user, length: 255 )
• created_date ( type: esriFieldTypeDate, alias: created_date, length: 8 )
• last_edited_user ( type: esriFieldTypeString, alias: last_edited_user, length: 255 )
• last_edited_date ( type: esriFieldTypeDate, alias: last_edited_date, length: 8 )

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

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