Guy R. Cochrane
2005
SECRUHAB -- Habitat polygons for Southeast Santa Cruz Island (UTM 10N, NAD83)
(Volume II, Version 1.0, 2005)
vector digital data
Open-File Report
2005-1170
Pacific Coastal and Marine Science Center, Santa Cruz, CA
U.S. Geological Survey
http://pubs.usgs.gov/of/2005/1170/habitat/secruhab.tgz
http://pubs.usgs.gov/of/2005/1170/catalog.html
https://doi.org/10.3133/ofr20051170
Guy R. Cochrane
James E. Conrad
Jane A. Reid
Sarah Fangman
Nadine Golden
2005
Nearshore Benthic Habitat GIS for the Channel Islands National Marine Sanctuary and Southern California State Fisheries Reserves, Volume II Edition: 1.0
1.0
Open-File Report
2005-1170
Pacific Coastal and Marine Science Center, Santa Cruz, CA
U.S. Geological Survey
https://doi.org/10.3133/ofr20051170
Benthic habitat polygon coverages have been created for marine reserve locations surrounding the Santa Barbara Basin. Diver, ROV and submersible video transects, bathymetry data, sedimentary samples, and sonar mapping, have been integrated to describe the geological, biological, and oceanographic aspects of habitat. Anacapa Reserve, is part of the Marine Ecological Reserves Research Program (MERRP). The U.S. Geological Survey (USGS), in a cooperative project with Sea Grant-MERRP and investigators at National Marine Fisheries Service (NMFS), the Channel Islands National Marine Sanctuary (CINMS), and National Park Service (NPS) has collected sidescan sonar and video data to produce a polygon coverage. The habitat polygons have attributes for megahabitat, bottom induration, macrohabitat (where macrohabitat observations are available), polygon area, polygon perimeter, and water depth. The habitat GIS shows rocky habitat suitable for rockfish (Sebastes sp.), abalone (Haliotis sp.), and other threatened benthic species from the shoreline out to the 100-m depth limit of the survey.
These data are intended for science researchers, students, policy makers, and the general public. The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information.
Additional information about the field activities from which this data set was derived are available online at http://walrus.wr.usgs.gov/nearshorehab/
1999
ground condition
As needed
-119.723930
-119.58984
33.991569
33.932464
USGS Metadata Identifier
USGS:ae649158-6345-4a6e-b1bf-72306cb7c05b
USGS Thesaurus
scientific interpretation
sea-floor characteristics
habitats
geology
marine geology
None
U.S. Geological Survey
USGS
Coastal and Marine Hazards and Resources Program
CMHRP
Pacific Coastal and Marine Science Center
PCMSC
Coastal Geology
benthic habitat
fisheries
seafloor
ISO 19115 Topic Category
oceans
biota
geoscientificinformation
None
Southeast Santa Cruz Island
Channel Islands
Channel Islands National Marine Sanctuary
Southern California
Santa Barbara
Ventura
California
CA
North Pacific Ocean
Northern Pacific Ocean
United States
west coast
USA
None
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originators of the dataset and in products derived from these data.
U.S. Geological Survey, Pacific Coastal and Marine Science Center
PCMSC Science Data Coordinator
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060-5792
US
831-427-4747
pcmsc_data@usgs.gov
http://pubs.usgs.gov/of/2005/1170/images/secruhab.jpg
JPEG image of habitat polygons for the Southeast Santa Cruz Island
JPEG
Thanks to the Staff of the Channel Islands National Marine Sanctuary, the crew of the NOAA R/V Ballena, the crew of the NOAA R/V MacArthur, and the crew of the UCSD R/V Sproul.
SunOS, 5.8, sun4u UNIX; ArcInfo version 8.0.2
Habitat polygons were hand drawn from a georeferenced sidescan sonar mosaic tiff.
Habitat attribute types are from Greene, G.H., Yoklavich, M.M., Starr, R.M., O'Connell, V.M., Wakefield, W.W., Sullivan, D.E., McRea, J.E., and Cailliet, G.M., 1999. A classification scheme for deep seafloor habitats. Oceanologica Acta, 22, 663-678.
Macrohabitat attributes assignments are limited to areas where bottom video has been collected.
Polygon topology present. Every polygon has a label and are all polygons closed
Macrohabitat classification is missing where video information is lacking
Accuracy of the horizontal coordinates is on the order of 10 m based on uncertainty in position of sidescan sonar fish relative to ships gps position.
//Create coast grid
1. Created polygon feature class of portion of ca coast line needed in ArcGIS by tracing the coast shape file. created: coast_poly.shp
2. Converted polygon feature class to grid
using ArcMap Spatial Analyst-->convert feature to raster.
created: coast_mask
>----------------------------------------------------------------------------------------
//Calculated no data where there is land
1. Created shapefile mask
-create new polygon feature class in ArcCatlog
-add new polygon to project
-using ArcMap Editor make new polygon a rectangle around all data
-in arctoolbox-->analysis tool-->overlay-->erase
erase coast_poly polygon from new rectangle polygon
new shapefile_erase has hole of island data
-in spatial analyst-->options-->set mask-->use drop down to select newerase shapefile
2. Recalculated secru1mhabg with new mask poly by using the spatial analyst's raster calculator
[secru1mhab1g] = [secru1mhabg] --> select evaluate
resulting grid has a hole (no data) where land was
//Set all 0 data to no data
1. Spatial analyst raster calculator divide grid by itself
secru1mhab1g/secru1mhab1g
where 0/0 will equal no data
all other data will be equal to 1
calculation leaves you with value 1 where there was data
2. Spatial analyst raster calculator multiply new calculation by original grid:
secru1mhab1g * [Calculation] (note: result is Calcultion2) so all values * 1 gives you original data
>-------------------------------------------------------------------------------------------
//Calculated new grid with cleaned near shore data (from mud to rock)
1. created update rock grid.
-used gridpaint tool to paint in additional rock near shore area in rock only grid
2. Merged new rock grid with previous all hab grid in Spatial Analyst tool Raster Calculator
-set option to Extent-->union of inputs.
-in raster calculator dialogue box merge grids of rck and hab:
[secru1mhab4g] = merge([secru_rock3 - secru_rock3],[Calculation2 ])
3. Cleaned up painted in data outside sonar area
-Convert new grid to polygon.
-Use ArcToolbox Earse tool with "cookie cutter" made from entire sonar area.
>-------------------------------------------------------------------------------------------
//Filtered grid to decrease polygon total
steps:
1. filtered original grid using the "low" filter default
filter secru1mhab5g secru1mhab6g
2. reclassified new grid using spatial anlysis reclassification option and the following remap categories:
1 128 : 85
129 189 : 170
190 225 : 255
3. converted new floating point grid to an integer grid.
secru1mhab8g = int(secru1mhab7g)
4. converted new floating integer grid to polygon shapefile using Toolbox Raster to Features: new polygon shapefile: 85,257 polygons original polygon shapefile: 171,781 polygons
20051210
Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.
20201019
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Edited metadata to add USGS Thesaurus keywords and perform minor edits to bring the metadata up to current PCMSC standards. No data were changed. The metadata available from a harvester may supersede metadata bundled within a download file. Users are advised to compare the metadata dates to determine which metadata file is most recent.
20211021
U.S. Geological Survey
Susan Cochran
Geologist
Mailing and Physical
2885 Mission Street
Santa Cruz
CA
95060
831-460-7545
scochran@usgs.gov
Vector
G-polygon
85259
Universal Transverse Mercator
10
0.999600
-123.000000
0.000000
500000.000000
0.000000
coordinate pair
.000032
.000032
meters
North American Datum of 1983
Geodetic ReferenceSystem 80
6378137
298.2572222
>
>secruhab Fields:
>
>NAME ALIAS TYPE LENGTH PRECISION SCALE NUMBER_FORMAT
>ID ID Double 10 10 0 Numeric
>GRIDCODE GRIDCODE Double 10 10 0 Numeric
>CODE CODE String 10 10 0 -
>MEGA_ID MEGA_ID String 5 0 0 -
>MSO_MRC_ID MSO_MRC_ID String 5 0 0 -
>MDFR_ID MDFR_ID String 5 0 0 -
>BOTTOM_ID BOTTOM_ID String 5 0 0 -
>GEO_UNIT GEO_UNIT String 50 0 0 -
>Area Area Double 19 18 11 Numeric
Benthic habitat classification attributes: megahabitat, bottom induration, meso-macrohabitat, and modifiers from Green and others, 1999. CODE is a combination of the habitat attributes.
MEGA_ID is usually S for Shelf, but may be F for basin or canyon flank.
BOTTOM_ID is h for hard bottom, m for mixed hard and soft bottom, or s for soft sediment bottom
MSO_MRC_ID are visual observations when sand waves (w) were observed. These macrohabitats described in Greene and others 1999.
MDFR_ID are modifiers to describe the texture or lithology of the seafloor and appear in the code preceded by an underscore (_). Including; fractured (_f), differently eroded (_d), kelp (_k), and limestone (_l)
Habitat attribute types are Modified after Greene, G.H., Yoklavich, M.M., Starr, R.M., O'Connell, V.M., Wakefield, W.W., Sullivan, D.E., McRea, J.E., and Cailliet, G.M., 1999. A classification scheme for deep seafloor habitats. Oceanologica Acta, 22, 663-678.
Guy R. Cochrane
U.S. Geological Survey
Geophysicist
mailing and physical address
2885 Mission Street
Santa Cruz
CA
95060-5792
USA
(831) 427-4754
(831) 427-4748
gcochrane@usgs.gov
Downloadable Data
Although these data have been used by the U.S. Geological Survey (USGS), U.S. Department of the Interior (DOI), no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
shapefile
3.3
ESRI Shapefile Format
The SHP file contains the geospatial data. The SHX file contains the index of the geospatial data. The DBF file contains the attribute data in dBase format. The PRJ file contains the coordinate system information (optional). The AVL file contains the legend information (optional). The SBN and SBX files contain the spatial index of the geospatial data (optional). The XML file contains the metadata describing the data set <data set name>.shp.xml. An ASCII version of the metadata file. A browse graphic showing the data layer coverage and extent (optional).
zip archive
40.3
http://pubs.usgs.gov/of/2005/1170/habitat/secruhab.tgz
http://pubs.usgs.gov/of/2005/1170/catalog.html
https://doi.org/10.3133/ofr20051170
Data may be retrieved via any WWW browser.
None
These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of the importing data. A free data viewer, arcexplorer, capable of displaying the data is available from ESRI at www.esri.com.
20211021
U.S. Geological Survey, Pacific Coastal and Marine Science Center
PCMSC Science Data Coordinator
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060-5792
US
831-427-4747
pcmsc_data@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
local time