GOM15CTR: Digital bathymetry contours of the Gulf of Maine

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?
• 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: GOM15CTR: Digital bathymetry contours of the Gulf of Maine

Abstract:

The U.S. Geological Survey is conducting studies of the sea floor geology in the Gulf of Maine and along the New England Shelf that provide geologic framework information for habitat, resource, and environmental studies. This data set provides bathymetric contours for the Gulf of Maine GIS project area.

1. How should this data set be cited?

   Roworth, E., and Signell, R.P., 1998, GOM15CTR: Digital bathymetry contours of the Gulf of Maine: U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

   Online Links:

   • <http://pubs.usgs.gov/of/of98-801/bathy/data.htm#Contours>
   • <http://coastalmap.marine.usgs.gov/GISdata/regional/eastcoast/gome/bathymetry/contours/gom15ctr/gom15ctr.zip>

   This is part of the following larger work.

   Roworth, E., and Signell, R.P., 1998, Construction of Digital Bathymetry for the Gulf of Maine: Open File Report 98-801, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -71.500000

   East_Bounding_Coordinate: -63.000000

   North_Bounding_Coordinate: 46.000000

   South_Bounding_Coordinate: 39.500000

3. What does it look like?

   gom15ctr (GIF)

   Overview of the Gulf of Maine bathymetry contours

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

   Calendar_Date: 1998

   Currentness_Reference: publication date

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

   Geospatial_Data_Presentation_Form: vector digital data

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):

      • String (12502)

   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 0.000000. Longitudes are given to the nearest 0.000000. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257224.
      

7. How does the data set describe geographic features?

   gom15ctr

   FID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: ESRI)

   Coordinates defining the features.

   FNODE_

   FNODE_ is an ArcInfo internal control parameter and has no applicable relevance to the use of the data.

   TNODE_

   TNODE_ is an ArcInfo internal control parameter and has no applicable relevance to the use of the data.

   LPOLY_

   LPOLY_ is an ArcInfo internal control parameter and has no applicable relevance to the use of the data.

   RPOLY_

   RPOLY_ is an ArcInfo internal control parameter and has no applicable relevance to the use of the data.

   LENGTH

   Lenth of the line segment in native units.

   GOM15CTR_

   GOM15CTR_ is an ArcInfo internal control parameter and has no applicable relevance to the use of the data.

   GOM15CTR_I

   GOM15CTR_I is an ArcInfo internal control parameter and has no applicable relevance to the use of the data.

   CONTOUR

   Contour depth value in meters. Value is recorded as negative values. (Source: Software computed)

   Range of values
   Minimum:	-4000
   Maximum:	-5
   Units:	meters
   Resolution:	1

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • E. Roworth
   • R.P. Signell

2. Who also contributed to the data set?

   Ed Roworth and Richard Signell for the original gridding process and creation of the Arc contours.

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

   U.S. Geological Survey
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   (508) 548-8700 (voice)
   (508) 457-2310 (FAX)
   

A system-wide description of the seafloor topography is a basic requirement for most coastal oceanographic studies. These data are intended for science researchers, students, policy makers, and the general public. The data can be used with geographic informationsystems (GIS) software to display geologic and oceanographic information.

1. From what previous works were the data drawn?

   NOSDB: NOAA Hydrographic Survey Data and NGDC Marine Trackline Geophysics Data (source 1 of 8)

   National Oceanic and Atmospheri, National Geophysical Data Center, Unknown, National Ocean Service (NOS) Hydrographic Data Base: National Geophysical Data Center, Boulder, CO.

   Online Links:

   • <http://www.ngdc.noaa.gov/>
   • <http://www.ngdc.noaa.gov/mgg/bathymetry/hydro.html>
   • <http://www.ngdc.noaa.gov/mgg/geodas/trackline.html>

   Other_Citation_Details:

   This data file contains hydrographic data from the National Ocean Survey including corrected soundings, bottom characteristics and dangers to navigation. The data were digitized from hydrographic survey smooth sheets from surveys conducted between 1930 and 1965. Surveys completed after 1965 are incorporated into the data base as they are received. Data are available for most of the coastal waters of the United States including the Great Lakes, Hawaii, Alaska and Puerto Rico. Sounding density generally increases as water depth and distance from shore decrease. The tidal data used are:

   Atlantic--mean low water; Gulf of Mexico--low water datum; Pacific--mean lower low water; Hawaii--mean lower low water; Alaska--mean lower low water; Great

   Lakes--low water datum. Data are archived under entry ID FE00125; data inventories are archived under entry ID FE00125B.

   Type_of_Source_Media: CD-ROM

   Source_Contribution:

   The largest digital dataset available was the National Ocean Service Hydrographic Data Base (NOSHDB) distributed by the National Geophysical Data Center. This digital dataset contains survey data from the National Ocean Service, the Defense Mapping Agency, Hydrographic/Topographic Data Center, and international sources. The NOSHDB contains data digitized from smooth sheets of hydrographic surveys completed between 1930 and 1965, and from survey data acquired digitally on NOS survey vessels since 1965. The vertical datum is mean low water and the horizontal datum is NAD27. The data is extremely dense in many regions (greater than 0.5 km resolution), but there are large gaps in the coverage due to surveys currently in non-digital form. The coverage is limited to U.S. waters.

   NGDC's Marine Trackline Geophysics database contains bathymetric, magnetic, gravity and seismic navigation data collected during marine cruises from 1953 to the present. Data sources include both U.S. and foreign oceanographic institutions and government agencies. The trackline bathymetric data available for the Gulf of Maine was collected using a variety of vertical datum's and unfortunately, much of this data turned out to be unsuitable for inclusion. Only a high resolution survey of the canyons south of Georges Bank was included.

   All the surveys within our latitude/longitude bounds were extracted from the NOS Hydrographic Survey Data Vol. 1, Ver. 3.2 CD-ROM using the supplied GEODAS software. The GEODAS software was used to retrieve data from the NGDC National Ocean Service Hydrographic Survey data and Marine Trackline Geophysics CD's. This software enabled the geographic search and retrieval of the NOS surveys and was able to export ASCII files of longitude, latitude, and depth. Identification of bad NGDC survey points was accomplished by using ESRI's ArcView. The depth values of the raw soundings were coded by colored dots, with the hue indicating depth. Errors where tracks crossed were thus readily apparent, and erroneous data were quickly identified by clicking on the point to determining the point attributes (survey ID, numeric depth value). If the problem was obvious (e.g. fathoms coded as feet), the depth values were corrected. Otherwise, the erroneous values were not used. The depth values in survey H08938 (northern Massachusetts Bay) were too large by nearly a factor of six, suggesting that these data had been originally coded as feet instead of fathoms. The depth values for this survey were therefore divided by a factor of six, upon which they blended smoothly with values from neighboring surveys. Depth values from surveys H08602 and H08603, south of Nantucket, were also clearly incorrect. These were eliminated since there was sufficient coverage in this region from other surveys. For all of the good NOSHDB data, the longitudes and latitudes were converted from NAD27 to NAD83 horizontal datum using the NAD2NAD program from the freely-available PROJ map projection software package. The depths were converted from a mean low water datum to an approximate mean sea level by adding the mean tidal amplitude at each sounding location. The mean tidal amplitude was determined by interpolating results from a high resolution numerical model of the M2 tide in the Gulf of Maine (Lynch and Naimie, 1993).

   DBDB-V: Naval Oceanographic Office DBDB-V gridded bathymetry (source 2 of 8)

   Sandy, Richard J. , 1996, Naval Oceanographic Office DBDB-V gridded bathymetry.

   Online Links:

   • <http://pdas.navo.navy.mil/>

   Other_Citation_Details:

   The DBDB-V Database, is a digital bathymetric database which provides ocean floor depths at various gridded resolutions (i.e. 5, 2, 1, and 0.5 minute). The DBDB-V database was developed by NAVOCEANO to support the generation of bathymetric chart products and to provide ocean floor depth data to be integrated with other geophysical and environmental parameters for ocean modeling.

   Source_Contribution:

   The Naval Oceanographic Office (NAVOCEANO) Digital Bathymetric Data Base - Variable Resolution (DBDB-V) is a collection of varying resolution bathymetry grids ranging from a global 5 minute grid (equivalent to DBDB5 and ETOPO5), to 30 second grids in certain regions. In the Gulf of Maine, several of the 30 second DBDB-V grids provided crucial coverage in the interior of the Gulf and in Canadian waters. These grids were "constructed from a variety of public and classified source data" (Sandy, 1996). The horizontal datum is WGS84 and the vertical datum is mean sea level.

   Greenberg Data: Supplemental Data from Bedford Institute of Oceanography (source 3 of 8)

   Greenberg, Dave, Greenberg Data: Supplemental Data from Bedford Institute of Oceanography:, Bedford Institute of Oceanography.

   Source_Contribution:

   Dave Greenberg from Bedford Institute in Canada supplied a bathymetry grid that had nominal 5 km spacing over most of the region. This data filled gaps in the interior of the Gulf between the NOSDB data and the DBDB-V data as well as providing coverage of the Scotian Shelf. The depths are relative to mean sea level. The horizontal datum is NAD27.

   Flagg Data: Supplemental Data from Brookhaven National Laboratory (source 4 of 8)

   Flagg, Charles, Flagg Data: Supplemental Data from Brookhaven National Laboratory:, Brookhaven National Laboratory.

   Source_Contribution:

   Bathymetry collected by Charles Flagg from Brookhaven National Laboratory during ADCP cruises for the Globec Georges Bank program were obtained to fill gaps on the eastern flank of Georges Bank. Depth values are relative to sea surface at the time of measurement. The horizontal datum is WGS84.

   Coastlines: NOAA Medium resolution digital Shoreline and DMA World Vector Shoreline (source 5 of 8)

   National Oceanic and Atmospheric Administration, and Agency, Defense Mapping , Coastlines: NOAA Medium resolution digital Shoreline and DMA World Vector Shoreline.

   Source_Contribution:

   The Medium Resolution Digital Shoreline is a high quality (1:80,000), GIS-ready, general use digital vector dataset for US shoreline created by the Strategic Environmental Assessments Division of NOAA's Office of Ocean Resources, Conservation and Assessment. The horizontal datum is NAD83 (equivalent to WGS84) and the shoreline is based on mean high water. The DMA's World Vector Shoreline (WVS) dataset is available on NGDC's "Global Relief" CD-ROM and is suitable for scales close to 1:250,000 . Ninety percent of all identifiable shoreline features are accurate to within 500 meters.

   ETOPO5: Defense Mapping Agency ETOPO5 Digital relief of the Surface of the Earth (source 6 of 8)

   Agency, Defense Mapping , ETOPO5: Defense Mapping Agency ETOPO5 Digital relief of the Surface of the Earth.

   Source_Contribution:

   ETOPO5 was generated from a digital data base of land and sea- floor elevations on a 5-minute latitude/longitude grid. The original source of the data in the ocean areas in ETOPO5 is from the U.S. Naval Oceanographic Office.

   GEBCO: General Bathymetric Chart of the Oceans (source 7 of 8)

   Center, British Oceanographic , GEBCO: General Bathymetric Chart of the Oceans.

   Source_Contribution:

   Digitized bathymetry for the World Ocean at a scale varying from 1:10 million to 1:500,000 depending on data density. GEBCO bathymetry is available from the British Oceanographic Center on behalf of the International Hydrographic Organization.

   DEM: USGS North American 30 arc-second Digital Elevation Model (source 8 of 8)

   , DEM: USGS North American 30 arc-second Digital Elevation Model.

   Source_Contribution:

   The USGS North American 30 arc-second DEM was used for land values in the Gulf Of Maine in the US and Canada. The North American 30 arc-second DEM was obtained from the USGS EROS Data Center. The horizontal datum is WGS84. The vertical datum is mean sea level.

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

   Date: Unknown (process 1 of 10)

   All the surveys within our latitude/longitude bounds were extracted from the NOS Hydrographic Survey Data Vol. 1, Ver. 3.2 CD-ROM using the supplied GEODAS software. The GEODAS software was used to retrieve data from the NGDC National Ocean Service Hydrographic Survey data and Marine Trackline Geophysics CD's. This software enabled the geographic search and retrieval of the NOS surveys and was able to export ASCII files of longitude, latitude, and depth.

   Identification of bad NGDC survey points was accomplished by using ESRI's ArcView. The depth values of the raw soundings were coded by colored dots, with the hue indicating depth. Errors where tracks crossed were thus readily apparent, and erroneous data were quickly identified by clicking on the point to determining the point attributes (survey ID, numeric depth value). If the problem was obvious (e.g. fathoms coded as feet), the depth values were corrected. Otherwise, the erroneous values were not used. The depth values in survey H08938 (northern Massachusetts Bay) were too large by nearly a factor of six, suggesting that these data had been originally coded as feet instead of fathoms. The depth values for this survey were therefore divided by a factor of six, upon which they blended smoothly with values from neighboring surveys. Depth values from surveys H08602 and H08603, south of Nantucket, were also clearly incorrect. These were eliminated since there was sufficient coverage in this region from other surveys.

   For all of the good NOSHDB data, the longitudes and latitudes were converted from NAD27 to NAD83 horizontal datum using the NAD2NAD program from the freely-available PROJ map projection software package. The depths were converted from a mean low water datum to an approximate mean sea level by adding the mean tidal amplitude at each sounding location. The mean tidal amplitude was determined by interpolating results from a high resolution numerical model of the M2 tide in the Gulf of Maine (Lynch and Naimie, 1993).

   Person who carried out this activity:
   

   Richard P. Signell
   U.S. Geological Survey
   384 Woods Hole
   Woods Hole, MA 02543-1598
   USA
   

   (508) 548-8700 (voice)
   (508) 457-2310 (FAX)
   

   Data sources used in this process:

   • NOSDB

   Date: Unknown (process 2 of 10)

   The NAVOCEANO DBDB-V bathymetry dataset was retrieved in its native binary format. This format required the use custom software that was supplied by NAVOCEANO for a SGI workstation. The SGI binary was used to convert the DBDB-V data to ASCII triplets (lon,lat,z). No datum corrections were made, since the data were already in WGS84 and relative to mean sea level.

   Person who carried out this activity:
   

   Richard P. Signell
   U.S. Geological Survey
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   (508) 548-8700 (voice)
   (508) 457-2310 (FAX)
   

   Data sources used in this process:

   • Dave Greenberg from Bedford Institute in Canada supplied a bathymetry grid that had nominal 5 km spacing over most of the region. This data filled gaps in the interior of the Gulf between the NOSDB data and the DBDB-V data as well as providing coverage of the Scotian Shelf. The depths are relative to mean sea level. The horizontal datum is NAD27. In addition, bathymetry collected by Charles Flagg from Brookhaven National Laboratory during ADCP cruises for the Globec Georges Bank program were obtained to fill gaps on the eastern flank of Georges Bank. Depth values are relative to sea surface at the time of measurement. The horizontal datum is WGS84.

   (process 3 of 10)

   The Greenberg data were converted to WGS84. No vertical datum conversions were performed, since the Greenberg data were relative to MSL and the Flagg data were unknown. Because of the relatively small tide range (< 1 m) in the Georges Bank region, however, the depth anomalies relative to MSL were considered insignificant.

   Person who carried out this activity:
   

   Richard P. Signell
   U.S. Geological Survey
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   (508) 548-8700 (voice)
   (508) 457-2310 (FAX)
   

   Data sources used in this process:

   • Greenberg data
   • Flagg data

   (process 4 of 10)

   NOAA's Medium resolution digital Shoreline and DMA World Vector Shoreline were edited in ArcInfo to match at the US Canadian border. Horizontal datum correction was not necessary. The shorelines were converted from an elevation of 0 above mean high water datum to elevations relative to mean sea level by adding the mean tidal amplitude at each sounding location by interpolating results from a high resolution numerical model of the M2 tide in the Gulf of Maine (Lynch and Naimie, 1993). The shoreline data were then used as elevation values in the composite dataset for the purpose of better defining the topography in the vicinity of the coast.

   Person who carried out this activity:
   

   Richard P. Signell
   U.S. Geological Survey
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   (508) 548-8700 (voice)
   (508) 457-2310 (FAX)
   

   Data sources used in this process:

   • coastlines

   Date: Unknown (process 5 of 10)

   All depth values less than 500 m were eliminated, since we were only interested in using ETOPO5 to describe the regions of the slope and rise where we had no other data.

   Person who carried out this activity:
   

   Richard P. Signell
   U.S. Geological Survey
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   (508) 548-8700 (voice)
   (508) 457-2310 (FAX)
   

   Data sources used in this process:

   • ETOPO5

   Date: Unknown (process 6 of 10)

   The 2000 and 3000 m isobaths were extracted from the GEBCO dataset in the region of interest and were used as digital soundings to enhance definition of the seamounts south of Georges Bank.

   Person who carried out this activity:
   

   Richard P. Signell
   U.S. Geological Survey
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   (508) 548-8700 (voice)
   (508) 457-2310 (FAX)
   

   Data sources used in this process:

   • GEBCO

   Date: Unknown (process 7 of 10)

   No datum conversions were necessary, since the data was already using the WGS84 and MSL horizontal and vertical datums.

   Person who carried out this activity:
   

   Richard P. Signell
   U.S. Geological Survey
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   (508) 548-8700 (voice)
   (508) 457-2310 (FAX)
   

   Data sources used in this process:

   • DEM

   Date: Unknown (process 8 of 10)

   The 15 and 30 second bathymetry grids were constructed using the freely-available Generic Mapping Tools (GMT) software (Wessel and Smith, 1991). The gridding technique consists of (1) pre-filtering the data with a block-median procedure to avoid aliasing small wavelengths, then solving a partial differential equation that combines Laplacian and bi-harmonic terms. See the paper by Smith and Wessel (1990).

   Note about NAD83 and WGS84 horizontal datums; The horizontal differences between NAD83 and WGS84 were determined to be insignificant at the resolution of the 15 and 30 arc-second grids. With cell sizes of ~500 and 1000 meters any displacement of data points because of differences in horizontal datum would have no effect on the outcome of the grid cell value after pre-filtering through the GMT block median procedure.

   Note about grid cell sizes: we produced the 15 and 30 arc-second grids because of varying source data resolution in the near-shore and offshore areas. The 15 arc-second grid has much higher source data resolution (NOS data) in the nearshore areas and could possibly be recompiled at a higher resolution in certain areas. The 30 arc second grid was produced for a more uniform fit of the data since the DBDB-V, and the USGS DEM contained data spaced at this resolution.

   Person who carried out this activity:
   

   Richard P. Signell
   U.S. Geological Survey
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   (508) 548-8700 (voice)
   (508) 457-2310 (FAX)
   

   Data sources used in this process:

   • gom15.xyz
   • gom30.xyz

   Data sources produced in this process:

   • gom15.grd
   • gom30.grd

   Date: Unknown (process 9 of 10)

   Contours lines were generated at the following intervals from the 15 second grid: {-4000.000, -3000, -2000, -1000, -500, -400, -300, -280, -260, -240, -220, -200, -180, -160,-140, -120, -100, -90, -80, -70, -60, -50, -40, -30, -20, -15, -10, -5}.

   The contour lines were exported and saved in the Arc export format.

   Person who carried out this activity:
   

   Richard P. Signell
   U.S. Geological Survey
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   (508) 548-8700 (voice)
   (508) 457-2310 (FAX)
   

   Data sources used in this process:

   • gom15.grd

   Data sources produced in this process:

   • selconddd.e00

   Date: 08-Mar-2004 (process 10 of 10)

   The Arc export file was converted to a shapefile.

   Person who carried out this activity:
   

   Valerie Paskevich
   U.S. Geological Survey
   Information Specialist, GIS Coordinator
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   (508) 548-8700 x2281 (voice)
   (508) 457-2310 (FAX)
   vpaskevich@usgs.gov
   

   Data sources used in this process:

   • selconddd.e00

   Data sources produced in this process:

   • gom15_ctr.dbf
   • gom15_ctr.shp
   • gom15_ctr.shx

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 observations, including topology?

   No additional checks for topological consistency were performed on the data.

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

Access_Constraints: None

Use_Constraints:

Bathymetry is not to be used for navigational purposes.

Public domain data from the U.S. government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.

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

   U.S. Geological Survey
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   (508) 548-8700 (voice)
   

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

   Downloadable Data: gom15cnt

3. What legal disclaimers am I supposed to read?

   Although this data set has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. 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.

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	Size: 18.265

   • Cost to order the data:

5. What hardware or software do I need in order to use the data set?

   The 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 importing data. A free data viewer, arcexplorer, is available from ESRI at www.esri.com.

Dates:

Last modified: 08-Mar-2004

Metadata author:

Valerie Paskevich
U.S. Geological Survey
Information Specialist / GIS Coordinator
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

(508) 548-8700 x2281 (voice)
(508) 457-2310 (FAX)
vpaskevich@usgs.gov

Metadata standard:

FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)