Car_grd8bit.sid: Coastal Relief Model Bathymetry image for the Caribbean (Puerto Rico and U.S. Virgin Islands)

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?

What does this data set describe?

1. How should this data set be cited?

   Buczkowski, Brian J. , 2006, Car_grd8bit.sid: Coastal Relief Model Bathymetry image for the Caribbean (Puerto Rico and U.S. Virgin Islands):,.

   Online Links:

   • <https://pubs.usgs.gov/ds/2006/146/basemaps/car_grd/car_grd.zip>

   This is part of the following larger work.

   Buczkowski, B.J., Reid, J.A., Jenkins, C.J., Reid, J.M., Williams, S.J., and Flocks, J.G., 2006, usSEABED: Gulf of Mexico and Caribbean (Puerto Rico and U.S. Virgin Islands) Offshore Surficial Sediment Data Release: Data Series 146, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

   Online Links:

   • <https://pubs.usgs.gov/ds/2006/146>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -68.966000

   East_Bounding_Coordinate: -64.345333

   North_Bounding_Coordinate: 19.964167

   South_Bounding_Coordinate: 17.928000

3. What does it look like?

   car_grd.jpg (JPEG)

   Image showing extent of data layer coverage

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

   Calendar_Date: 2001

   Currentness_Reference: publication date

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

   Geospatial_Data_Presentation_Form: remote-sensing image

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 8953 x 10453 x 1, type Pixel

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

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.
      

7. How does the data set describe geographic features?

   Band_1

   ObjectID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Value

   Count

   Band_2

   ObjectID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Value

   Count

   Band_3

   ObjectID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Value

   Count

Who produced the data set?

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

2. Who also contributed to the data set?

3. To whom should users address questions about the data?
   Brian J. Buczkowski
   U.S. Geoogical Survey
   Core Curator and Data Management Specialist
   USGS Woods Hole Science Center
   Woods Hole, MA 02543-1598
   USA
   

   508-458-8700 x2361 (voice)
   508-457-2310 (FAX)
   bbuczkowski@usgs.gov
   

Why was the data set created?

This image provides a color view of the CRM for the project area and is used as a basemap for overlaying usSEABED data.

How was the data set created?

1. From what previous works were the data drawn?

   NGDC CRM, Puerto Rico, Vol 9 (source 1 of 1)

   , Coastal Relief Model, Puerto Rico, Vol 9.

   Type_of_Source_Media: CD-ROM

   Source_Contribution: Vol 9 was used to create the raster grid of the Caribbean

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

   (process 1 of 6)

   The desired data was extracted from the Coastal Relief Model volume 9 in the ESRI ASCII format. The ASCII dataset was then converted to an ESRI grid file.

   Person who carried out this activity:
   

   Brian J. Buczkowski
   U.S. Geological Survey
   Core Curator and Data Management Specialist
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   508-458-8700 x2361 (voice)
   508-457-2310 (FAX)
   bbuczkowski@usgs.gov
   

   Data sources produced in this process:

   • car_grd

   (process 2 of 6)

   The grid was hillshaded, usisng ArcMap 3D Analyst .

   Data sources used in this process:

   • car_grd

   Data sources produced in this process:

   • car_grd_hlshd

   (process 3 of 6)

   The grids car_grd and car_grd_hlshd were overlain and made transparent so the hillshade may be seen beneath the bathymetry directly extracted for the Coastal Relief Model.

   Data sources used in this process:

   • car_grd
   • car_grd_hlshd

   Data sources produced in this process:

   • car_grd
   • car_grd_hlshd

   (process 4 of 6)

   The grid was converted to a tiff image using the extension image_convert_georef.avx downloaded from www.esri.com.

   Data sources used in this process:

   • car_grd
   • car_grd_hlshd

   Data sources produced in this process:

   • car_grd.tif
   • car_grd.tfw

   (process 5 of 6)

   The tiff image was converted to 8 bit using Photoshop CS in order to reduce the file size.

   Data sources used in this process:

   • car_grd.tif
   • car_grd.tfw

   Data sources produced in this process:

   • car_grd8bit.tif
   • car_grd8bit.tfw

   (process 6 of 6)

   The tiff image was compressed using Lizardtech's Mr. Sid compression software.

   Data sources used in this process:

   • car_grd8bit.tif
   • car_grd8bit.tfw

   Data sources produced in this process:

   • car_grd8bit.sid
   • car_grd8bit.sdw

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

   National Oceanic and Atmospheri, National Geophysical Data Center (NGDC), 20010907, Coastal Relief Model, Volume 9 (Puerto Rico).

   Online Links:

   • <http://www.ngdc.noaa.gov/mgg/coastal/coastal.html>

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 observations, including topology?

How can someone get a copy of the data set?

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

Access_Constraints:

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.

Use_Constraints: Bathymetry is not to be used for navigation purposes.

1. Who distributes the data set?[Distributor contact information not provided.]

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

   Downloadable Data; Marine Aggregate Resources and Processes: car_grd8bit.sid

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.

   Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.

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

     Data format:	Mr Sid Size: 1.926

   • Cost to order the data:

Who wrote the metadata?

Dates:

Last modified: 09-Feb-2006

Metadata author:

Brian J. Buczkowski
U.S. Geological Survey
Core Curator and Data Management Specialist
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

508-458-8700 x2361 (voice)
508-457-2310 (FAX)
bbuczkowski@usgs.gov

Metadata standard:

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

Metadata extensions used:

• <http://www.esri.com/metadata/esriprof80.html>