GLORIA sidescan sonar mosaic

Frequently anticipated questions:

• What does this data set describe?
  1. How might 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 might this data set be cited?
   Paskevich, Valerie, 2000, GLORIA sidescan sonar mosaic: Open-File Report 2000-352, USGS Coastal and Marine Geology Team, U.S. Geological Survey, Woods Hole, MA.

   Online Links:

   • https://doi.org/10.3133/ofr00352
   • https://pubs.usgs.gov/of/2000/of00-352/htmldocs/images.htm

   This is part of the following larger work.
   Paskevich, Valerie F., Twichell, David C., and Schwab, William C., 2000, Seamarc 1A sidescan sonar mosaic, cores and depositional interpretation of the Mississippi Fan: ArcView GIS data release: Open-File Report 2000-352, U.S. Geological Survey, Reston, VA.

   Online Links:

   • https://doi.org/10.3133/ofr00352

   Other_Citation_Details:

   Suggested citation: Paskevich, V.F., Twichell, D.C., and Schwab, W.C., 2000, Seamarc 1A sidescan sonar mosaic, cores and depositional interpretation of the Mississippi Fan—ArcView GIS data release: U.S. Geological Survey Open-File Report 2000-352, https://doi.org/10.3133/ofr00352.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -96
   East_Bounding_Coordinate: -82
   North_Bounding_Coordinate: 29.5
   South_Bounding_Coordinate: 23
   

3. What does it look like?

   https://pubs.usgs.gov/of/2000/of00-352/data/gloria/browse/compos.gif (250m image of the GLORIA sidescan sonar mosaic on a black background for the Gulf of Mexico)

   GIF

   https://pubs.usgs.gov/of/2000/of00-352/data/gloria/browse/composw.gif (250m image of the GLORIA sidescan sonar mosaic on a white background for the Gulf of Mexico)

   GIF

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

   Beginning_Date: 02-Feb-1982

   Ending_Date: 29-Sep-1985

   Currentness_Reference:

   data collection

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 2848 x 5635, type Pixel
   2. What coordinate system is used to represent geographic features?
      The map projection used is Albers Conical Equal Area.
      

      Projection parameters:

      Standard_Parallel: 29.5
      Standard_Parallel: 45.5
      Longitude_of_Central_Meridian: -089.000000
      Latitude_of_Projection_Origin: +00.000000
      False_Easting: 0
      False_Northing: 0
      

      Planar coordinates are encoded using row and column
      Abscissae (x-coordinates) are specified to the nearest 250
      Ordinates (y-coordinates) are specified to the nearest 250
      Planar coordinates are specified in Meters
      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      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: No attributes are associated with the image.
   Entity_and_Attribute_Detail_Citation: No attributes are associated with the image.
   

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Valerie Paskevich
2. Who also contributed to the data set?
   The U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data.
3. To whom should users address questions about the data?
   U. S. Geological Survey

   Attn: Dave Twichell

   Oceanographer

   384 Woods Hole Road

   Woods Hole, MA
   

   USA

   (508) 548-8700 x2266 (voice)

   (508) 457-2310 (FAX)

   dtwichell@usgs.gov

Why was the data set created?

How was the data set created?

1. From what previous works were the data drawn?

   OFR96-657 (source 1 of 2)

   Paskevich(comp.), Valerie, 19961008, Digital Mosaics of the GLORIA Sidescan Sonar Data of the Gulf of Mexico: U.S. Geological Survey Open-File Report OFR96-657, Coastal and Marine Geology Program, Woods Hole, MA, U.S. Geological Survey.

   Online Links:

   • https://doi.org/10.3133/ofr96657

   Other_Citation_Details:

   The original metadata had a link to a computer in Woods Hole (kai) that is no longer available. It's unclear if the version of the mosaic on that one is the revised image indicated in the edition. The kai data are no longer available.

   This is part of the following larger work.

   various(comp.), 1987, Atlas of the U.S. Exclusive Economic Zone, Gulf of Mexico and eastern Caribbean areas: U.S. Geological Survey Miscellaneous Investigations I-1864-A, U.S. Geological Survey, Office of Marine Geology, U.S. Geological Survey, Reston, VA.

   Online Links:

   • https://doi.org/10.3133/i1864AB

   Type_of_Source_Media: CD-ROM
   Source_Contribution:

   The 16 individual 50m mosaics were combined to create the 250m composite Gulf of Mexico GLORIA mosaic.

   I-1864-A,B (source 2 of 2)

   U.S. Geological Survey(comp.), National Oceanic and Atmospheric Administration, and National Aeronautics and Space Administration, 19880323, GLORIA Data: Gulf of Mexico: GLORIA Data: Gulf of Mexico Gloria01, U.S. Geological Survey, Office of Energy and Marine Geology, U.S. Geological Survey, Reston, VA.

   Type_of_Source_Media: CD-ROM
   Source_Contribution:

   Raw imagery of GLORIA data may be retrieved from this CD-ROM. The user must note the number of pixels (samples) and lines contained in the data set to convert the raw imagery to a useable image format. The information can be found in the 'lbl' file associated with the image file.

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

   Date: 04-Sep-1998 (process 1 of 7)

   The 16 individual 50m GLORIA GEOTIFF images for the Gulf of Mexico were re-sampled to 250m and combined to create an overview digital mosaic of the Gulf of Mexico. Utilizing the PCI Remote Sensing software, an empty 'pix' file was defined. This file included the maximum extents of the GLORIA Gulf of Mexico survey area at a 250 m resolution. The images original projection (Albers Equal Area) and datum (Clarke 1866) was used to define the new image file. Utilizing the georeferencing information contained in the GEOTIFF images, the individual 50 m mosaic were placed in their proper geographic location in the new image via GCPworks. A bilinear resampling was applied to the image pixels to create the sub-sampled GLORIA mosaic. Person who carried out this activity:
   

   U. S. Geological Survey

   Attn: Valerie Paskevich

   Computer Specialist

   384 Woods Hole Road

   Woods Hole, MA
   

   USA

   (508) 548-8700 x2281 (voice)

   (508) 457-2310 (FAX)

   vpaskevich@usgs.gov

   Data sources used in this process:

   • OFR96-657
   • mos01.tif-mos16.tif

   Data sources produced in this process:

   • compos.pix

   Date: 04-Sep-1998 (process 2 of 7)

   The completed 250m Gulf of Mexico GLORIA mosaic was exported from the PCI 'pix' database as a GEOTIFF image with an associated ARC "world" file. Person who carried out this activity:
   

   U. S. Geological Survey

   Attn: Valerie Paskevich

   Computer Specialist

   384 Woods Hole Road

   Woods Hole, MA
   

   USA

   (508) 548-8700 x2281 (voice)

   (508) 457-2310 (FAX)

   vpaskevich@usgs.gov

   Data sources used in this process:

   • compos.pix

   Data sources produced in this process:

   • compos.tif

   Date: 04-Sep-1998 (process 3 of 7)

   The completed 250m Gulf of Mexico GLORIA mosaic was exported from the PCI 'pix' database as a JPEG image with an associated ARC "world" file. Person who carried out this activity:
   

   U. S. Geological Survey

   Attn: Valerie Paskevich

   Computer Specialist

   384 Woods Hole Road

   Woods Hole, MA
   

   USA

   (508) 548-8700 x2281 (voice)

   (508) 457-2310 (FAX)

   vpaskevich@usgs.gov

   Data sources used in this process:

   • compos.pix

   Data sources produced in this process:

   • compos.jpg

   Date: 04-Sep-1998 (process 4 of 7)

   The compos.tif image with a black area surrounding the mosaic was processed with Corel PhotoPaint to convert the black area to white. The black was replaced with white using a flood fill operation. For some display purposes, this image may be more useful than the one with a black background. Person who carried out this activity:
   

   U. S. Geological Survey

   Attn: Valerie Paskevich

   Computer Specialist

   384 Woods Hole Road

   Woods Hole, MA
   

   USA

   (508) 548-8700 x2281 (voice)

   (508) 457-2310 (FAX)

   vpaskevich@usgs.gov

   Data sources used in this process:

   • compos.tif

   Data sources produced in this process:

   • composw.tif

   Date: 04-Sep-1998 (process 5 of 7)

   The compos.tif image with a black area surrounding the mosaic was processed with Corel PhotoPaint to convert the black are to white. The black was replaced with white using a flood fill operation and then converted and saved in a JPG format. For some display purposes, this image may be more useful than the one with a black background. Person who carried out this activity:
   

   U. S. Geological Survey

   Attn: Valerie Paskevich

   Computer Specialist

   384 Woods Hole Road

   Woods Hole, MA
   

   USA

   (508) 548-8700 x2281 (voice)

   (508) 457-2310 (FAX)

   vpaskevich@usgs.gov

   Data sources used in this process:

   • compos.tif

   Data sources produced in this process:

   • composw.jpg

   Date: 22-Aug-2023 (process 6 of 7)

   Edited the metadata to remove errors flagged by MP. Filled out the citation information including adding the edition, suggested citation, adding the DOI link and a link to the data page. Added USGS Thesaurus and ISO 19115 Topic Category theme keywords. Added the link to the browse graphic. Removed unrequired elements with a value of "unknown". Indicated in some required elements that information was unavailable from the original metadata. Added links to the source citations. Additional small edits to the metadata were made to be consistent with current standards. Updated the distribution liability to an approved FSP disclaimer statement. Updated the distribution section to provide links to the data. The metadata date was updated, but not the metadata contact. The metadata contact email was updated to a valid link with an explanation in the contact instructions (20230822). The metadata available from a harvester may supersede metadata available from the publication. Compare the metadata dates to determine which metadata file is most recent. Person who carried out this activity:
   

   U.S. Geological Survey

   Attn: VeeAnn A. Cross

   Marine Geologist

   384 Woods Hole Rd.

   Woods Hole, MA
   

   USA

   (508) 548-8700 x2251 (voice)

   (508) 457-2310 (FAX)

   vatnipp@usgs.gov

   Date: 06-Aug-2024 (process 7 of 7)

   Added keywords section with USGS persistent identifier as theme keyword. Person who carried out this activity:
   

   U.S. Geological Survey

   Attn: VeeAnn A. Cross

   Marine Geologist

   384 Woods Hole Road

   Woods Hole, MA
   

   508-548-8700 x2251 (voice)

   508-457-2310 (FAX)

   vatnipp@usgs.gov

3. What similar or related data should the user be aware of?
   Paskevich, V., 2000, Gulf of Mexico GLORIA Sidescan Sonar Geologic Interpretation: ArcView Data Coverages: USGS Open-File Report 00-019, USGS Coastal and Marine Geology Team, U.S. Geological Survey, Woods Hole, MA.

   Online Links:

   • https://doi.org/10.3133/ofr0019

How reliable are the data; what problems remain in the data set?

1. How well have the observations been checked?
   no attributes associated with the image
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?
   Information not available from original metadata.

How can someone get a copy of the data set?

1. Who distributes the data set? (Distributor 1 of 1)
   
   U. S. Geological Survey

   Attn: Valerie Paskevich

   Computer Specialist

   384 Woods Hole Road

   Woods Hole, MA
   

   USA

   (508) 548-8700 x2281 (voice)

   (508) 457-2310 (FAX)

   vpaskevich@usgs.gov
2. What's the catalog number I need to order this data set? compos image in either TIF or JPEG format. The data are actually available with a white background (composw) or a black background (compos). The links in the ditribution will allow a user to download either one.
3. What legal disclaimers am I supposed to read?
   Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.
4. How can I download or order the data?
   • Availability in digital form:

     Data format:	TIFF Size: 16
     Network links:	https://pubs.usgs.gov/of/2000/of00-352/data/gloria/compos.tif https://pubs.usgs.gov/of/2000/of00-352/data/gloria/composw.tif https://pubs.usgs.gov/of/2000/of00-352/htmldocs/images.htm https://doi.org/10.3133/ofr00352
     Media you can order:	CD-ROM (Density 650 Mbytes) (format ISO 9600) Note: The user must have a system with a CD-ROM capable of reading an ISO-9660 standard CD-ROM disk. To browse the information contained on this disk, the user must also have a current version of WWW browser available.

     Data format:	JPEG Size: 3.2
     Network links:	https://pubs.usgs.gov/of/2000/of00-352/data/gloria/compos.jpg https://pubs.usgs.gov/of/2000/of00-352/data/gloria/composw.jpg https://pubs.usgs.gov/of/2000/of00-352/htmldocs/images.htm https://doi.org/10.3133/ofr00352
     Media you can order:	CD-ROM (Density 650 Mbytes) (format ISO 9600) Note: The user must have a system with a CD-ROM capable of reading an ISO-9660 standard CD-ROM disk. To browse the information contained on this disk, the user must also have a current version of WWW browser available.

   • Cost to order the data: none

5. What hardware or software do I need in order to use the data set?
   An image viewer, image processing or GIS software package capable of importing a GEOTIFF or JPEG format file. If the georeferencing information cannot be automatically imported from the image file, the user may wish to obtain the georeferencing information contained in a separate file, compos.txt, in the data/gloria directory.

Who wrote the metadata?

Dates:

Last modified: 06-Aug-2024

Metadata author:

U. S. Geological Survey

Attn: Valerie Paskevich

Computer Specialist

384 Woods Hole Rd.

Woods Hole, MA

USA

(508) 548-8700 x2281 (voice)

(508) 457-2310 (FAX)

whsc_data_contact@usgs.gov

Contact_Instructions:

The metadata contact email address is a generic address in the event the person is no longer with USGS.

Metadata standard:

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