Layer: SeafloorCharacter_5m_OffshoreAptos.tif (ID: 6)

Name: SeafloorCharacter_5m_OffshoreAptos.tif

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Description: This part of DS 781 presents the seafloor-character map Offshore of Aptos, California. The raster data file is included in "SeafloorCharacter_5m_OffshoreAptos.zip," which is accessible from http://pubs.usgs.gov/ds/781/OffshoreAptos/data_catalog_OffshoreAptos.html. This raster-format seafloor character map shows three substrate classes Offshore of Aptos, California. The substrate classes mapped in this area have been further divided into the following California Marine Life Protection Act depth zones and slope classes: Depth Zone 3 (30 to 100 m), Depth Zone 4 (100 to 200 m), Depth Zone 5 (greater than 200 m), Slope Class 1 (0 degrees - 5 degrees), and Slope Class 2 (5 degrees - 30 degrees). Depth Zones 1-2 (intertidal to 30 m), and Slopes Classes 3-4 (greater than 30 degrees) are not present in the region covered by this dataset. The map is created using a supervised classification method described by Cochrane (2008), available at http://doc.nprb.org/web/research/research%20pubs/615_habitat_mapping_workshop/Individual%20Chapters%20High-Res/Ch13%20Cochrane.pdf.

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