Coverage smihab -- Habitat polygons for San Miguel

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

Title: Coverage smihab -- Habitat polygons for San Miguel

Abstract:

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. Big Sycamore 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.

Supplemental_Information:

Additional information about the field activities from which this data set was derived are available online at <http://walrus.wr.usgs.gov/nearshorehab/>

Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology.

1. How should this data set be cited?

   Cochrane, Guy R. , 2002mmdd, Coverage smihab -- Habitat polygons for San Miguel: USGS Open-File Report USGS OFR 03-85, U.S. Geological Survey, Menlo Park, CA.

   Online Links:

   • <URL:http://geopubs.wr.usgs.gov/open-file/of03-85>

   This is part of the following larger work.

   Cochrane, Guy R. , Nasby, Nicole M. , Reid, Jane A. , Waltenberger, Ben, and Lee, Kristen M. , 2003, Nearshore Benthic Habitat GIS for the Channel Islands National Mairne Santuary and Southern California State Fisheries Reserves, Volume 1.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -120.45515442

   East_Bounding_Coordinate: -120.29520416

   North_Bounding_Coordinate: 34.02464294

   South_Bounding_Coordinate: 33.97219086

3. What does it look like?

   <http://geopubs.wr.usgs.gov/open-file/of03-85/s_mig/smihab.jpg> (JPEG)

   JPEG image of habitat polygons

4. Does the data set describe conditions during a particular time period?

   Calendar_Date: 2002

   Currentness_Reference: Ground Condition

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: map

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • Point (2246)
      • String (2249)
      • GT-polygon composed of chains (2246)

   2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.0000245498723. Longitudes are given to the nearest 0.0000245498723. Latitude and longitude values are specified in Decimal Degrees.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is GRS1980.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.
      

7. How does the data set describe geographic features?

   Entity_and_Attribute_Overview:

   
   
   
   SMIGHAB.PAT:
   
   
   
   COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
   
       1  AREA                   4    12     F      3
   
       5  PERIMETER              4    12     F      3
   
       9  SMIGHAB#               4     5     B      -
   
      13  SMIGHAB-ID             4     5     B      -
   
      17  CODE                  11    11     C      -
   
      28  MEGA_ID                9     9     C      -
   
      37  BOTTOM_ID              9     9     C      -
   
      46  MSO_MRC_ID             9     9     C      -
   
      55  MDFR_ID                9     9     C      -
   
      64  AREA_SQM               8    18     F      0
   
      72  PERIM_M                8    18     F      0
   
   

   Attributes 5-9 are 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 is based on visual observations of kelp (k), sand waves (w) and other macrohabitats described in Greene and others 1999. MDFR_ID are modifiers to describe the texture or lithology of the seafloor such as f for fractured.

   Entity_and_Attribute_Detail_Citation:

   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.

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Guy R. Cochrane

2. Who also contributed to the data set?

   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.

3. To whom should users address questions about the data?

   Guy R. Cochrane
   United States Geological Survey (USGS)
   Geophysicist
   USGS, MailStop 999, 345 Middlefield Road
   Menlo Park, CA 94025-3561
   USA
   

   (650) 329-5076 (voice)
   (650) 329-5190 (FAX)
   gcochrane@usgs.gov
   

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.

1. From what previous works were the data drawn?

2. How were the data generated, processed, and modified?

   Date: 05-Jul-2002 (process 1 of 1)

   Cochrane, G.R., and K. D. Lafferty, 2002, Use of acoustic classification of sidescan sonar data for mapping benthic habitat in the Northern Channel Islands, California. Continental Shelf Research, 22:683-690.

3. What similar or related data should the user be aware of?

   United States Geological Survey, Coastal and Marine Geology (CMG), 20020916, USGS CMG San Miguel Habitat Metadata.

   Online Links:

   • <http://geopubs.wr.usgs.gov/open-file/of03-85/>

   This is part of the following larger work.

   United States Geological Survey, Coastal and Marine Geology (CMG), 20020916, USGS CMG Infobank.

   Online Links:

   • <http://walrus.wr.usgs.gov/infobank>

1. How well have the observations been checked?

   Habitat polygons were hand drawn from a georefereced 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.

2. How accurate are the geographic locations?

   Accuracy of the horizontal coordinates is on the order of 10 m based on uncertainty in position of sidescansonar fish relative to ships gps position.

3. How accurate are the heights or depths?

4. Where are the gaps in the data? What is missing?

   Macrohabitat classification is missing where video information is lacking.

5. How consistent are the relationships among the observations, including topology?

   Polygon topology present. Every polygon has a label and are all polygons closed.

Are there legal restrictions on access or use of the data?

Access_Constraints: None

Use_Constraints: Not Suitable for navigation.

1. Who distributes the data set? (Distributor 1 of 1)

   United States Geological Survey (USGS)
   c/o Guy R. Cochrane
   Geophysicist
   USGS, MailStop 999, 345 Middlefield Road
   Menlo Park, CA 94025-3561
   USA
   

   (650) 329-5076 (voice)
   (650) 329-5190 (FAX)
   gcochrane@usgs.gov
   

2. What's the catalog number I need to order this data set?

3. What legal disclaimers am I supposed to read?

   Please recognize the U.S. Geological Survey (USGS) as the source of this information.

   Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, 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 U.S. Geological Survey in the use of this data, software, or related materials.

4. How can I download or order the data?

Dates:

Last modified: 15-Jan-2003
Last Reviewed: 15-Jul-2003

Metadata author:

United States Geological Survey (USGS)
c/o Guy R. Cochrane
Geophysicist
USGS, MailStop 999, 345 Middlefield Road
Menlo Park, CA 94025-3561
USA

(650) 329-5076 (voice)
(650) 329-5190 (FAX)
gcochrane@usgs.gov

Metadata standard:

FGDC Content Standards for Digital Geospatial Metadata ("CSDGM version 2") (FGDC-STD-001-1998)