Layer: 2013 California Department of Fish & Wildlife Kelp Polygons (ID:3)

View In: Map Viewer

Name: 2013 California Department of Fish & Wildlife Kelp Polygons

Display Field: Type

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Two datasets were compiled for this survey. Both vector datasets are thematic maps representing mosaicked multi-spectral imagery, targeting both exposed and submerged kelp beds. The imagery collected by Sandoval and Associates, LLC under contract by CDFW was aquired at a 0.30 meter spatial resolution using a Microsoft UltraCam Eagle digital camera. The NAVAIR Point Mugu Sea Range imagery used to create the classification was acquired at a spatial resolution of 0.38 meters using a Microsoft UltraCam-X digital camera. Both systems acquiried imagery in the red, green, blue and near-infrared bands and the image mosaic product used for the classification is a result of the resampling to 2 meter resoultion. Surface kelp canopy and subsurface kelp classifications are seperate. Not all areas were surveyed. Areas that were surveyed: Anacapa, San Nicolas, and Santa Catalina Islands; portions of Santa Rosa, San Miguel, and Santa Cruz Islands; San Clemente mainland to Malibu, Oxnard to Santa Barbara, and Bodega Bay to north of Jenner.DISCLAIMER The user is cautioned against making direct comparisons between the various kelp surveys for the following reasons: (1)Timing of the survey is important, particularly with respect to growing season, conditions in the ocean, storms, and harvest levels preceding the dates of imagery collection. Season variability may account for differences in surveys which may not reflect a change in the bed's extent, productivity, or harvest level. (2) Statisical significance in change of area should be evaluated. To do this, a variance parameter is needed, which is obtained by repeated measurements. (3) Survey methods may not be consistent. Some method of calibration between the methods should be performed in order to insure a change of area is not due to survey instrumentation and not misinterpreted as a biological change. (4) An area where no kelp data are present may represent an area devoid of kelp, or may represent an area where kelp was not detected due to poor photo quality, missing photo coverage, or other issues with data collection and processing. Image coverage is extensive for the state, but the user is advised to consult the supplementary information for each year to determine whether imagery were acquired for an area of interest.

Copyright Text: California Department of Fish and Wildlife - Marine Region, Naval Air Systems Command.

Min. Scale: 0

Max. Scale: 0

Default Visibility: true

Max Record Count: 2000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

Drawing Info:

{"renderer":{"type":"simple","symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[45,150,89,76],"outline":{"type":"esriSLS","style":"esriSLSSolid","color":[110,110,110,255],"width":0.7}}},"scaleSymbols":true,"transparency":0,"labelingInfo":null}
HasZ: false

HasM: false

Has Attachments: false

Has Geometry Properties: true

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Object ID Field: OBJECTID

Unique ID Field:

Global ID Field:

Type ID Field:

Fields:

OBJECTID (type: esriFieldTypeOID, alias: OBJECTID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
Type (type: esriFieldTypeString, alias: Type, SQL Type: sqlTypeOther, length: 50, nullable: true, editable: true)
KELPBED (type: esriFieldTypeString, alias: KELPBED, SQL Type: sqlTypeOther, length: 5, nullable: true, editable: true)
Area (type: esriFieldTypeDouble, alias: Area, SQL Type: sqlTypeOther, nullable: true, editable: true)
Length (type: esriFieldTypeDouble, alias: Length, 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)

Templates:

Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 7/28/2024 6:17:37 AM

Schema Last Edit Date: 7/28/2024 6:17:37 AM

Data Last Edit Date: 7/28/2024 6:17:37 AM

Supported Operations: Query Query Pivot Query Top Features Query Analytic Query Bins Generate Renderer Validate SQL Get Estimates ConvertFormat