Faults of the Caribbean Region (flt6bg)

Metadata also available as: html  text

Return to data files page: click here

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: Faults of the Caribbean Region (flt6bg)

Abstract:

This dataset describes faults and structural features of the Caribbean region (Anguilla, Antigua and Barbuda, Aruba, Bahamas, Barbados, Belize, British Virgin Islands, Cayman Islands, Colombia, Costa Rica, Cuba, Dominica, Dominican Republic, El Salvador, Grenada, Guadeloupe, Guatemala, Guyana, Haiti, Honduras, Jamaica, Martinique, Mexico, Montserrat, Netherlands Antilles, Nicaragua, Panama, Puerto Rico, St. Kitts and Nevis, St. Lucia, St. Vincent and the Grenadines, Trinidad and Tobago, Turks and Caicos Islands, United States, Venezuela, and the Virgin Islands (named countries may not be completely shown on map)).

Supplemental_Information:

In many offshore areas and in some onshore areas, faults shown are based on subsurface drill or seismic data and may not reach the surface.

Offshore structural features are interpreted from a combination of seismic reflection data and analysis of bathymetric features. Where track control is sparse, structural features have been plotted approximately normal to track direction. Thus, true strikes of structural features may vary considerably from those shown on map.

1. How should this data set be cited?

   Christopher D. French and Christopher J. Schenk, USGS, Denver, CO, 20040000, Faults of the Caribbean Region (flt6bg): U.S. Geological Survey, Central Energy Resources Team, Denver, Colorado.

   Online Links:

   • <http://certmapper.cr.usgs.gov/pubs/servlet/PubBroker?issue=ofr97470k&path=/graphic/data.html>

   This is part of the following larger work.

   Christopher D. French and Christopher J. Schenk, USGS, Denver, CO, 20040000, Open-File Report 97-470-K "Map Showing Geology, Oil and Gas Fields, and Geologic Provinces of the Caribbean Region": U.S. Geological Survey Open-File Report OFR-97-470-K, U.S. Geological Survey, Central Energy Resources Team, Denver, Colorado, USA.

   Online Links:

   • <http://certmapper.cr.usgs.gov/pubs/servlet/PubBroker?issue=ofr97470k>

   Other_Citation_Details:

   Open File Report 97-470-K is one of a series of continental-scale geologic maps of the world being published on CD-ROM by the U.S. Geological Survey World Energy Project.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -93.015633

   East_Bounding_Coordinate: -58.475106

   North_Bounding_Coordinate: 28.000000

   South_Bounding_Coordinate: 7.026141

3. What does it look like?

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

   Calendar_Date: 2003

   Currentness_Reference: publication date

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

   Geospatial_Data_Presentation_Form: Downloadable GIS 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 (5942)

   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 0.000001. Longitudes are given to the nearest 0.000001. 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.
      

      Vertical_Coordinate_System_Definition:

      Altitude_System_Definition:

7. How does the data set describe geographic features?

   Faults

   Feature Class Attribute Table (Source: None)

   Shape_Length

   Length of feature in internal units. (Source: ESRI)

   Positive real numbers that are automatically generated.

   Code

   Fault Type Code (Source: User Defined)

   Value	Definition
   FDT	Fault - downthrown
   FDTA	Fault - downthrown - approximated
   FU	Fault - displacement unknown
   FUA	Fault - displacement unknown - approximated
   FUS	Fault - displacement unknown - speculative
   IZU	Inferred zone of underthrusting
   RTF	Fault - reverse or thrust
   RTFA	Fault - reverse or thrust - approximated or inferred
   SSTF	Strike slip or transform fault
   SSTFA	Strike slip or transform fault - approximated or inferred

   Description

   Fault Description (Source: User Defined)

   Value	Definition
   Fault - downthrown - approximated	Normal fault, downthrown
   Fault - downthrown - approximated	Normal fault, downthrown, location approximated
   Fault - displacement unknown	Normal fault, displacement unknown
   Fault - displacement unknown - approximated	Normal fault, displacement unknown, location approximated
   Fault - displacement unknown - speculative	Normal fault, displacement unknown, location speculative
   Inferred zone of underthrusting	Inferred zone of underthrusting
   Fault - reverse or thrust	Reverse or thrust fault
   Fault - reverse or thrust - approximated or inferred	Reverse or thrust fault, location approximated or inferred
   Strike slip or transform fault	Strike-slip or transform fault
   Strike slip or transform fault - approximated or inferred	Strike-slip or transform fault, location approximated or inferred

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Christopher D. French and Christopher J. Schenk, USGS, Denver, CO

2. Who also contributed to the data set?

   Scanning of source map, georeferencing, digitizing, attributing, editing and preparation of geodatabase feature class - Christopher D. French

   Metadata Creation - Christopher D. French

   Project coordination - Christopher J. Schenk

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

   Christopher D. French
   U.S. Geological Survey, Central Energy Resources Team
   GIS Specialist
   U.S. Geological Survey, Box 25046, MS 939, Denver Federal Center
   Denver, Colorado 80225-0046
   USA
   

   303-236-1655 (voice)
   303-236-0459 (FAX)
   chfrench@usgs.gov
   

To delineate geologic structural features and fault types in Open File Report 97-470-K Map Showing Geology, Oil and Gas Fields, and Geologic Provinces of the Caribbean Region, which was compiled as a reference for the U.S. Geological Survey World Energy Project assessment of undiscovered, technically recoverable oil and gas resources of the world. This dataset was used to produce maps in both ESRI ArcMap 8.3 and Adobe Acrobat PDF formats. Files were exported from geodatabase feature class to ESRI shapefile and ArcInfo export formats for use in other applications.

1. From what previous works were the data drawn?

   USGS (source 1 of 2)

   J.E. Case and T.L. Holcombe, 1980, Geologic-Tectonic Map of the Caribbean Region: Miscellaneous Investigations Series Map I-1100, USGS, Reston, VA.

   Online Links:

   • N/A

   Other_Citation_Details:

   Prepared in cooperation with the United States Naval Oceanographic Office and the United States Naval Ocean Research and Development Activity.

   Type_of_Source_Media: paper

   Source_Scale_Denominator: 2500000

   Source_Contribution: Geologic contacts and ages.

   NIMA (source 2 of 2)

   National Imagery and Mapping Agency, 1997, VMAP_1V10-Vector map Level 0 (Digital chart of the World).

   Other_Citation_Details: Can be found on USGS DDS-62-A (POLBNDA.shp)

   Type_of_Source_Media: CD-ROM

   Source_Scale_Denominator: 1000000

   Source_Contribution: Used as a general guide for georeferencing.

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

   Date: Jun-2002 (process 1 of 5)

   USGS maps were scanned at 300 dpi resolution and RGB color setting.

   Data sources used in this process:

   • USGS

   Date: Jun-2002 (process 2 of 5)

   USGS source maps merged in Adobe Photoshop 6.0.

   Data sources used in this process:

   • USGS

   Date: Jun-2002 (process 3 of 5)

   Scanned source maps were registered using georeferencing tools in ArcGIS 8.3, and NIMA country boundary shapefile as a guide.

   Data sources used in this process:

   • USGS
   • ESRI

   Date: Mar-2003 (process 4 of 5)

   Geologic contacts were digitized on screen as a personal geodatabase feature class using scanned and referenced image as a guide.

   Date: Jan-2003 (process 5 of 5)

   Geodatabase coded domains established to attribute feature class. Codes and descriptions used original source map legend as a guide. Some descriptions abbreviated.

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

1. How well have the observations been checked?

   Scanned source maps used as a reference for attributing.

2. How accurate are the geographic locations?

   Horizontal positional accuracy was not formally quantified. Some details about the scanning and referencing process along with errors are stated below.

   1) Original source map was provided in two plates at a scale of 1:2,500,000. Each plate was scanned at 300 dpi in RGB color mode. Adobe Photoshop 6.0 was used to merge east and west images together at edges. Some discrepancies were noticed on edge match. Edge mismatch was no greater than 500 m in a few areas, while good matches were found elsewhere. Discrepancies were averaged while digitizing.

   2) A vector dataset orginating from the National Imagery and Mapping Agency (NIMA) Digital Chart of the World (DCW) series was available for georeferencing. This dataset is known to have a nominal scale of 1:1,000,000 and was available as a shapefile from the United States Geological Survey, Digital Data Series DDS-62-A Global GIS Database: Digital Atlas of Central and South America.

   3) ArcMap 8.3 georeferencing tool was used to establish control points and reference merged image. Original maps were provided in Mercator projection with true scale at 19 degrees north latitude. Attempts were made to transform the reference shapefile to the stated projection for georeferencing, but major errors existed along southern edges of map. A geographic coordinate system (WGS_1984) was used with more success. 57 control points were established to perform a 3rd order polynomial transformation. Other transformation methods were attempted along with other control point placement, but resulted in more error. A root mean square (RMS) error of 1611.8 m was recorded.

   4) Discrepancies were anticipated between source map shorelines and country boundaries because of scale difference. Other distortions may have been inherent in the source maps. Overall dimensions of map fit well at desired display scale of 1:2,500,000. Discrepancies in shoreline were random and variable, rarely exceeding 3,500 m.

3. How accurate are the heights or depths?

   N/A

4. Where are the gaps in the data? What is missing?

   Complete

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

   Line topology exists. Snapping to geologic contacts used while digitizing. Geodatabase coded domains used for attributing. To and from node direction indicates downthrown side of fault.

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

Access_Constraints: None

Use_Constraints: None

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

   USGS Information Services
   Box 25286 Denver Federal Center
   Denver, Colorado 80225
   USA
   

   1-888-ASK-USGS (voice)
   303.202.4693 (FAX)
   ask@usgs.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?

   This pubilication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.

   Although all data and software published on this CD-ROM are used by the U.S. Geological Survey, no warranty, expressed or implied, is made by the U.S. Geological Survey as to the accuracy of the data and related materials and (or) the functioning of the software. 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 these data, software, or related materials.

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

     Data format:	Contains line features depicting faults and structures of the Caribbean region. in format Shapefile Size: 633 KB
     Network links:	<http://certmapper.cr.usgs.gov/data/we/ofr97470k/spatial/shape/flt6bg.zip>

     Data format:	Contains line features depicting faults and structures of the Caribbean region. in format ArcInfo Export File Size: 769 KB
     Network links:	<http://certmapper.cr.usgs.gov/data/we/ofr97470k/spatial/export/flt6bg.zip>

     Data format:	A web-based interactive mapping system that accesses an ArcIMS Map Service running on certmapper.cr.usgs.gov. in format Image Map Service (WorldCaribbean) (version 4.01) ArcIMS Image Map Service
     Network links:	<http://certmapper.cr.usgs.gov/pubs/servlet/MapViewerBroker?project=world&Service=WorldCaribbean&OVMap=WorldCaribbean_overview>

     Data format:	Contains polygon features depicting structural faults of the Caribbean region in addition to other geology-related features. in format ArcGIS Geodatabase File (version 8.3) Size: 6.3 MB
     Network links:	<http://certmapper.cr.usgs.gov/data/we/ofr97470k/spatial/geodatabase/caribbean.zip>

   • Cost to order the data: None

   • Special instructions:

     This product can be downloaded individually using any one of the digit form, network resource name URLs above. Each of these URLs may provide access to various formats of the same product. To order the larger work such as the entire CD-ROM the dataset may have been published on, please use the contact information provided above.

Dates:

Last modified: 15-Mar-2004
Last Reviewed: 2004

Metadata author:

Christopher French
U.S. Geological Survey, Central Energy Resources Team, Data Management Project
GIS Specialist
U.S. Geological Survey, Box 25046, MS 939, Denver Federal Center
Denver, Colorado 80225
USA

303-236-1655 (voice)
datamgt@usgs.gov

Contact_Instructions:

For inquiries regarding this document, please include the metadata contact person's name, dataset name, and publication series and number.

Metadata standard:

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

Metadata extensions used:

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

AccessibilityFOIAPrivacyPolicies and Notices
U.S. Department of the Interior | U.S. Geological Survey URL: <http://pubs.usgs.gov/of/1997/ofr-97-470/OF97-470K/spatial/doc/faq/flt6bg_faq.html> Contact: Energy Program Inquiries Questions or Assistance: GS Pubs Web Contact Page Last Modified: Thr Jan 10 21:45 EDT 2013