Seafloor character, 2 m resolution--Offshore of Aptos, California

This part of DS 781 presents the seafloor-character map Offshore of Aptos, California. The raster data file is included in "SeafloorCharacter_2m_OffshoreAptos.zip," which is accessible from http://dx.doi.org/10.5066/F7K35RQB.
This raster-format seafloor character map shows five 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 2 (intertidal to 30 m), Depth Zone 3 (30 to 100 m), Depth Zone 4 (100 to 200 m), Slope Class 1 (0 degrees - 5 degrees), and Slope Class 2 (5 degrees - 30 degrees). Depth Zone 1 (intertidal), Depth Zone 5 (greater than 200 m), and Slopes Classes 3-4 (greater than 30 degrees) are not present in the region covered by this block. The map is created using a supervised classification method described by Cochrane (2008).
References Cited:
California Department of Fish and Game, 2008, California Marine Life Protection Act master plan for marine protected areas; Revised draft: California Department of Fish and Game, accessed April 5 2011, at http://www.dfg.ca.gov/mlpa/masterplan.asp.
Cochrane, G.R., 2008, Video-supervised classification of sonar data for mapping seafloor habitat, in Reynolds, J.R., and Greene, H.G., eds., Marine habitat mapping technology for Alaska: Fairbanks, University of Alaska, Alaska Sea Grant College Program, p. 185-194, accessed April 5, 2011, at http://doc.nprb.org/web/research/research%20pubs/615_habitat_mapping_workshop/Individual%20Chapters%20High-Res/Ch13%20Cochrane.pdf.
Sappington, J.M., Longshore, K.M., and Thompson, D.B., 2007, Quantifying landscape ruggedness for animal habitat analysis--A case study using bighorn sheep in the Mojave Desert: Journal of Wildlife Management, v. 71, p. 1419-1426.

本DS 781数据集的此部分展示了加利福尼亚州阿普托斯近海的海底特征图（seafloor-character map）。其栅格数据文件包含于"SeafloorCharacter_2m_OffshoreAptos.zip"中，可通过http://dx.doi.org/10.5066/F7K35RQB获取。

这份栅格格式的海底特征图展示了阿普托斯近海的5种底质类型（substrate classes）。本区域内的底质类型已进一步划分为以下《加州海洋生物保护法》（California Marine Life Protection Act）规定的深度带与坡度等级：深度带2（潮间带至30米）、深度带3（30米至100米）、深度带4（100米至200米）、坡度等级1（0°~5°）以及坡度等级2（5°~30°）。深度带1（潮间带）、深度带5（水深大于200米）以及坡度等级3-4（坡度大于30°）不在本次制图覆盖区域内。本图采用Cochrane（2008）提出的监督分类方法（supervised classification method）制作。

参考文献：
加利福尼亚州鱼类与野生动物局（California Department of Fish and Game），2008年，《加州海洋生物保护法》海洋保护区总体规划；修订草案：加利福尼亚州鱼类与野生动物局，2011年4月5日获取，http://www.dfg.ca.gov/mlpa/masterplan.asp。
Cochrane, G.R.，2008年，用于海底栖息地制图的声呐数据视频监督分类，收录于Reynolds, J.R.与Greene, H.G.编辑的《阿拉斯加海洋栖息地制图技术》：费尔班克斯，阿拉斯加大学，阿拉斯加海洋资助学院项目，第185-194页，2011年4月5日获取，http://doc.nprb.org/web/research/research%20pubs/615_habitat_mapping_workshop/Individual%20Chapters%20High-Res/Ch13%20Cochrane.pdf。
Sappington, J.M.、Longshore, K.M.与Thompson, D.B.，2007年，用于动物栖息地分析的景观粗糙度量化——以莫哈韦沙漠大角羊为例：《野生动物管理杂志》（Journal of Wildlife Management），第71卷，第1419-1426页。