Bathymetry and topography data (BATTOPOG, BATTOPSD.TIF) for the Monterey Bay region from Point Ano Nuevo to Point Sur, California

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:

Bathymetry and topography data (BATTOPOG, BATTOPSD.TIF) for the Monterey Bay region from Point Ano Nuevo to Point Sur, California

Abstract:

This dataset contains elevation data above and below sealevel for the the greater Monterey Bay area between Point Ano Nuevo to the north and Point Sur to the south. BATTOPOG is a 30-meter grid of offshore bathymetry and onshore topography assembled from USGS Digital Elevation Model (DEM) and National Oceanic and Atmospheric Administration (NOAA)/National Ocean Service (NOS) data. BATTOPSD.TIF is a shaded relief version of BATTOPOG converted to a TIFF image.

This is one of a collection of digital files of a geographic information system of spatially referenced data related to the USGS Coastal and Marine Geology Program "Monterey Bay National Marine Sanctuary Project" <http://walrus.wr.usgs.gov/mbms>. The data were collected and analyzed between 1994 and 2000.

1. How should this data set be cited?

   Degnan, Carolyn H. , Wong, Florence L. , and Lee, Wilson C. , 2001, Bathymetry and topography data (BATTOPOG, BATTOPSD.TIF) for the Monterey Bay region from Point Ano Nuevo to Point Sur, California:.

   Online Links:

   • <http://geopubs.wr.usgs.gov/open-file/of01-179>

   This is part of the following larger work.

   Wong, F.L., and Eittreim, S.E., 2001, Continental Shelf GIS for the Monterey Bay National Marine Sanctuary: U.S. Geological Survey Open-File Report 01-179, U.S. Geological Survey, Menlo Park, CA.

   Online Links:

   • <http://geopubs.wr.usgs.gov/open-file/of01-179/>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -122.45742314

   East_Bounding_Coordinate: -121.66685445

   North_Bounding_Coordinate: 37.16997434

   South_Bounding_Coordinate: 36.16417055

3. What does it look like?

   <http://geopubs.wr.usgs.gov/open-file/of01-179/images/battopo.gif> (GIF)

   location map of battopog

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

   Calendar_Date: 1998

   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 Raster data set. It contains the following raster data types:

      • Dimensions 3697 x 2319, type Grid Cell

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

      Grid_Coordinate_System_Name: Universal Transverse Mercator

      Universal_Transverse_Mercator:

      UTM_Zone_Number: 10

      Transverse_Mercator:

      Scale_Factor_at_Central_Meridian: 0.9996

      Longitude_of_Central_Meridian: -123.00000

      Latitude_of_Projection_Origin: 0.00000

      False_Easting: 500000.00

      False_Northing: 0.00

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 30.0
      Ordinates (y-coordinates) are specified to the nearest 30.0
      Planar coordinates are specified in Meters

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is GRS1980.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257.
      

7. How does the data set describe geographic features?

   Entity_and_Attribute_Overview:

   BATTOPOG is an ArcInfo grid with the following attributes:

   
    Data Type:                 Integer
    Number of Values =            4417
    Attribute Data (bytes) =         8
   
    BOUNDARY (UTM meters)
    Xmin =  548796.110
    Xmax =  618366.110
    Ymin = 4002959.860
    Ymax = 4113869.860
   
    STATISTICS (grid cell values, elevation in meters)
    Minimum Value =       -2957.000
    Maximum Value =        1469.000
    Mean          =        -450.719
    Standard Deviation =    796.272
   

   BATTOPSD.TIF is a grayscale TIFF image with the following attributes::

    Image Depth =                8
    Image Bands =                1
    Number of Columns =       2319
    Number of Rows =          3697
    Pixel Size DX =          30.00
    Pixel Size DY =          30.00
   
    BOUNDARY (UTM meters)
    Xmin =                 548796.11
    Ymin =                4002959.86
    Xmax =                 618366.11
    Ymax =                4113869.86
   

   Entity_and_Attribute_Detail_Citation: none

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Carolyn H. Degnan
   • Florence L. Wong
   • Wilson C. Lee

2. Who also contributed to the data set?

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

   Florence L. Wong
   United States Geological Survey (USGS)
   Geologist, GIS Coordinator
   USGS, MailStop 999, 345 Middlefield Road
   Menlo Park, CA 94025-3561
   USA
   

   (650) 329-5327 (voice)
   (650) 329-5190 (FAX)
   fwong@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 about the shallower areas of the Monterey Bay National Marine Sanctuary.

1. From what previous works were the data drawn?

   Graham and Pike (1998) (source 1 of 5)

   Graham, Scott E., and Pike, Richard J., 1998, Elevation maps of the San Francisco Bay region, California: A digital database: U.S. Geological Survey Open-file Report 98-625.

   Online Links:

   • <http://wrgis.wr.usgs.gov/open-file/of98-625>

   Type_of_Source_Media: electronic

   Source_Contribution: grid of topography north of latitude 37 North

   Mark (1992) (source 2 of 5)

   Mark, R.K., 1992, A multidirectional, oblique-weighted, shaded relief image of the island of Hawaii: U.S. Geological Survey Open-file Report 92-422.

   Type_of_Source_Media: paper

   Source_Contribution: shaded relief calculation

   NOAA (1998) (source 3 of 5)

   NOAA, 1998, NOS Hydrographic Survey Data, US Coastal Waters: Data Announcement 98-MGG-03.

   Online Links:

   • <http://www.ngdc.noaa.gov/mgg/fliers/98mgg03.html>

   Other_Citation_Details: Boulder, CO, World Data Center for Marine Geology & Geophysics

   Type_of_Source_Media: CD-ROM

   Source_Contribution: bathymetric data points

   Ramsey (1997) (source 4 of 5)

   Ramsey, D.W., 1998, written communication, 30-m elevation grid for Monterey 30- x 60-minute quadrangle.

   Type_of_Source_Media: electronic

   Source_Contribution: 30-m elevation grid

   Wessel and Smith (1998) (source 5 of 5)

   Wessel, P., and Smith, W. H. F., 1998, New, improved version of Generic Mapping Tools released: Eos, Trans. Amer. Geophys. Union 79:579.

   Online Links:

   • <http://gmt.soest.hawaii.edu>

   Type_of_Source_Media: online

   Source_Contribution: grid tools

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

   Date: Nov-1999 (process 1 of 4)

   C.H. Degnan: extracted bathymetry data from NOAA (1998), gridded it in GMT (Wessel and Smith, 1998) with a 2-second grid spacing, and exported the grid values as ASCII xyz coordinates.

   Date: Dec-1999 (process 2 of 4)

   W.C. Lee: converted bathymetry xyz coordinates to ArcInfo point coverage. Created ArcInfo TIN from point coverage; converted TIN to 50-m grid (Arc: TINLATTICE, quintic option). Assembled 30-m elevation grid for western part of Point Sur 30- x 60-minute quadrangle from 7.5-minute USGS DEMs.

   Date: Aug-2000 (process 3 of 4)

   Note - Names of intermediate files are used in the following description for reference only; those intermediate files are not included in this dataset.

   F.L. Wong: Applied low-pass filter (Arc: FILTER, 2 iterations) to bathymetry grid to smooth data. Resampled bathymetry to 30 m cell size and converted to integer grid BATIG.

   Converted elevation grid SFBR-EL north of latitude 37 North (Graham and Pike, 1998) from datum NAD27 to NAD83 and z-units from decimeters to meters. Similarly converted Monterey elevation grid (Ramsey, 1997).

   In study window, built a grid mask enclosed by the coastline and the scratch boundary. With mask active, merged Point Sur, Monterey, and SFBR-EL 30-m grids as TOPOG. Converted TOPOG from floating point to integer grid TOPOIG.

   Merged TOPOIG and BATIG as BATTOPOG. Applied shading scheme (Mark, 1992) to grid to produce shaded relief grid BATTOPOSHDG Converted battoposhdg to TIFF image BATTOPSD.TIF.

   Date: 21-Feb-2001 (process 4 of 4)

   First draft of metadata created by F.L. Wong using a modified version of FGDCMETA.AML on ARC/INFO data set BATTOPOG

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

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?

   Complete.

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

   Not applicable for raster data.

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

Access_Constraints: None

Use_Constraints:

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.

This information is not intended for navigational purposes.

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

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

   United States Geological Survey (USGS)
   c/o Florence L. Wong
   Geologist, GIS Coordinator
   USGS, MailStop 999, 345 Middlefield Road
   Menlo Park, CA 94025-3561
   USA
   

   (650) 329-5327 (voice)
   (650) 329-5190 (FAX)
   fwong@usgs.gov
   

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

   USGS Open-File Report 01-179

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.

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

   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?
   • Availability in digital form:

     Data format:	Arc GRID, TIFF Size: 13 megabytes, 8 megabytes
     Network links:	<http://geopubs.wr.usgs.gov/open-file/of01-179>

   • Cost to order the data: none

Dates:

Last modified: 21-Mar-2001
Last Reviewed: May-2001

Metadata author:

United States Geological Survey (USGS)
c/o Florence L. Wong
Geologist, GIS Coordinator
USGS, MailStop 999, 345 Middlefield Road
Menlo Park, CA 94025-3561
USA

(650) 329-5327 (voice)
(650) 329-5190 (FAX)
fwong@usgs.gov

Metadata standard:

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