Summit to Sea Characterization of Coastal Watersheds - US Virgin Islands 2005

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Frequently anticipated questions:

What does this data set describe?

Title:
Summit to Sea Characterization of Coastal Watersheds - US Virgin Islands 2005
Abstract:
This Characterization of Coastal Watershed for St Croix, St. John and St Thomas, US Virgin Islands, is a GIS products suite consisting of layers derived from diverse source data sets and subsequent GIS processes. The layers are:

1. Watershed boundaries (shapefiles), or hydrological units and their physical and erosion related characteristics; 2. Estimated depth represents the relative bathymetry of the U.S. Virgin Islands shallow waters based on Landsat imagery: 3. Indicates the potential threat of sediment delivery and land-based sources of pollution to benthic habitats. This dataset is derived from NOAA's study, the Benthic Habitats of Puerto Rico and the U.S. Virgin Islands: 4. Digital Elevation Model (DEM) was created from the existing U.S. Geological Survey, National Elevation Dataset (NED) by filtering artifacts, converting to the NAD83 datum, edge-matching, and sliver filling of missing data. 5. Steepest downhill descent for each raster cell calculated by the Slope function in ArcGIS; 6. Relative erosion rate by land cover type 2000 were determined from a table; 7. Relative erosion rate by land cover type 1990 were determined from a table; 8. Erodibility of soils (Kffact) based upon soil composition derived from the SSURGO soils data base; 9. Mean annual precipitation (mm), derived from climate data collected at weather stations from 1990-2000 (NOAA Monthly Surface Data, NCDC); 10. Maximum monthly precipitation, derived from monthly precipitation for all available weather stations in U. S. V. I. 11. Watershed outflow points, (areas of maximum flow accumulation within hydrological basins) calculated from FLOWDIRECTION and FLOWACCUMULATION which were derived from the Digital Elevation Model (DEM); 12. topographic slope for Puerto Rico, derived from the U.S. Geological Survey's National Elevation Dataset using various processing and filtering to improve results; 13. Relative Erosion Potential - 2000 (an indicator of sediment and pollution runoff) derived from USGS National Elevation Dataset, NRCS Soils Database and NOAA Monthly Surface Data; 14. Relative Erosion Potential - 1990 derived from USGS National Elevation Dataset, NRCS Soils Database and NOAA Monthly Surface Data; 15. Potential threat of sediment delivery and land-based sources of pollution to coral ecosystems derived from land cover (LC) database (Created by spectral analysis of consistently orthorectified Landsat Thematic Mapper (TM) imagery), USGS National Elevation Dataset, NRCS Soils Database and NOAA Monthly Surface Data; and 16. Relative vulnerability to erosion - 2000 derived from land cover (LC) database (Created by spectral analysis of consistently orthorectified Landsat Thematic Mapper (TM) imagery), USGS National Elevation Dataset, NRCS Soils Database.

  1. How should this data set be cited?

    National Ocean Service, Center for Coastal Monitoring and Assessment (CCMA), Biogeography Team, 200511, Summit to Sea Characterization of Coastal Watersheds - US Virgin Islands 2005.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -65.153531
    East_Bounding_Coordinate: -64.183567
    North_Bounding_Coordinate: 18.884064
    South_Bounding_Coordinate: 17.594527

  3. What does it look like?

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

    Beginning_Date: 1999
    Ending_Date: 2003
    Currentness_Reference: ground condition

  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?

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

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 20
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -63.000000
      Latitude_of_Projection_Origin: 0.000000
      False_Easting: 500000.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using Coordinate Pair
      Abscissae (x-coordinates) are specified to the nearest 30.0000
      Ordinates (y-coordinates) are specified to the nearest 30.0000
      Planar coordinates are specified in meters

      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?

Who produced the data set?

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

  2. Who also contributed to the data set?

    NOAA Summit-to-Sea Project, World Resources Institute (WRI)

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

    Steve Rohmann
    NOAA - NOS
    Physical Scientist
    1305 East-West Highway
    Silver Spring, MD 20910
    USA

    (301) 713 3000 x137 (voice)
    (301) 713 4384 (FAX)
    Steve.Rohmann@noaa.gov

Why was the data set created?

To explore the spatial linkages between changes in coral reef ecosystems and land use change, and land-based sources of pollution for U. S. Virgin Islands.

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?

How can someone get a copy of the data set?

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

Access_Constraints: None.
Use_Constraints:
Acknowledgement of NOAA, National Ocean Service, Center for Coastal Monitoring and Assessment (CCMA), Biogeography Team's Summit to Sea Project will be appreciated. The distribution of this data product by NOAA does not constitute any real or implied responsibility for its accuracy or usefulness. Map products should not be used for navigation.

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

    NOAA - Summit-to-Sea Project
    Attn: Aurelie C. Shapiro
    GIS Analyst
    1305 East-West highway
    Silver Spring, MD 20910
    USA

    301 713 3000 x202 (voice)
    301 713 4384 (FAX)
    aurelie.shapiro@noaa.gov

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

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA can not assume liability for and damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.

  4. How can I download or order the data?

  5. Is there some other way to get the data?

    Contact Distributor.

Who wrote the metadata?

Dates:
Last modified: 20-Dec-2012
Metadata author:
NOAA - NOS
Attn: Steve O. Rohmann
Physical Scientist
1305 East-West Highway
Silver Spring, MD 20910

301 713 3000 x137 (voice)

Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

Generated by mp version 2.9.13 on Mon Jun 17 06:48:56 2013