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Maps showing geology, oil and gas fields and geological provinces of Africa

Metadata also available as - [Questions & Answers] - [Parseable text] - [DIF]

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Feliks Persits

Originator: Michele Tuttle

Originator: Ronald Charpentier

Originator: Michael Brownfield

Originator: Kenneth Takahashi

Publication_Date: 1997

Title:

Maps showing geology, oil and gas fields and geological provinces of Africa

Edition: 1.0

Geospatial_Data_Presentation_Form: map

Series_Information:

Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 97-470A

Publication_Information:

Publication_Place: Denver, Colorado
Publisher: U.S. Geological Survey

Larger_Work_Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: 1998

Title: World energy data on CD-ROM

Edition: 1.0

Geospatial_Data_Presentation_Form: map

Series_Information:

Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 97-470

Online_Linkage: <http://energy.cr.usgs.gov/energy/WorldEnergy/WEnergy.html>

Description:

Purpose:

The data provide government, geological community, consultants, and public with information on important geological basis used to define provinces and oil and gas fields for USGS oil and gas assessement of the world.

Abstract:

Map showing geology, oil and gas fields and geologic provinces of Africa in a data set designed originally in ESRI's ARC/INFO geographic information system, version 7.0.4.

Supplemental_Information:

The data set contains the following components:

COVER (directory)
   Contains original UNIX ARC/INFO (ver. 7.0.4) coverages in
   Robinson projection. The ARC/INFO coverages are
   supplemented by several files (total 30) in ARC/INFO
   INTERCHANGE format (where it was available). These files
   allow user to produce complete Map Composition of data at
   a scale 1:12,500,000 by using ARCPLOT subsystem.
COVER/geo2_7 (coverage)
   Surficial geology. Item "glg" in Feature Attribute Table.
COVER/prov2_7 (coverage)
   Geological Provinces that outline areas with common
   geological structures and petroleum systems. There are
   two additional items in the FAT, "code" - Geologic
   Province code and "name" - Geologic Province name.
COVER/fld2_7 (coverage)
   Centerpoints of Oil and Gas fields.
COVER/pol2_7 (coverage)
   Country boundaries.
COVER/llf2_7 (coverage)
   Latitude/Longitude grid with cell size 4 * 6 degree.
COVER/reg_2_7 (coverage)
   Boundary between region 2 (Middle East/North Africa and
   7 (Sub Saharan Africa). These regions are two of the
   eight regional subdivisions in the USGS Oil and Gas
   assessment of the World.
COVER/anno2_7 (coverage)
   Annotations for ocean names.
COVER/shore2_7 (coverage)
   Shoreline for Africa and surrounding areas
EXPRT_UX (directory)
   This directory contains several subsets of the data in
   export and ungenerate formats for use on UNIX systems: (
   1) ARC/INFO EXPORT data set (Robinson projection)
   consisting of eight files in ARC/INFO INTERCHANGE
   format (*.e00 files without compression). File names are
   correspondent to the original coverages names (see
   directory COVER). (2) ARC/INFO UNGENERATE files (ASCII
   comma delimeted) for four major coverages (*.gen
   extention). File names correspond to the original
   coverage names. (3) Attribute files (*.csv extention).
   Contains ASCII, comma delimeted files for the five
   feature attribute tables of the ARC/INFO coverages.
EXPRT_PC (directory)
  same contents as EXPRT_UX but for PC's not running UNIX.
PLOT (directory)
  Files to facilitate plotting and printing the map.
PLOT/afr_map (directory)
  Complete map composition for use in ARC/INFO ARCPLOT, a
  collection of *.gra files.
PLOT/prov2_7 (directory)
  Complete map composition without geology for use in ARC/
  INFO ARCPLOT, a collection of *.gra files.
PLOT/afr.hp2 (file)
  Plot file for all the data in HPGL2 format.
PLOT/provs.hp2 (file)
  Plot file for data without geology in HPGL2 format.
TEXT_UX (directory)
TEXT_UX/plot_aml (text file)
  AML file to produce complete Map Composition at a scale
  1:12,500,000 and to plot map composition automatically on
  HP650C plotter. To use this file the user must set actual
  full path name to the data or copy all the files to
  single directory (by Feliks Persits).
TEXT_UX/usgs_lab (text file)
  USGS headline text
TEXT_UX/source (text file)
  List of all the sources of the data
TEXT_UX/authors (text file)
  Who participated in Data Set creation.
TEXT_UX/pol_txt (text file)
  Text indicating political boundaries are for reference
  and are not definitive in any manner.
TEXT_UX/geo_rob (text file)
  Command file for PROJECT (Geographic to Robinson).
TEXT_UX/tr_rob (text file)
  Command file for PROJECT (Transverse Mercator to Robinson).
TEXT_UX/index (text file)
  Text for small index map showing Provinces and boundary
  between regions 2 and 7.
TEXT_UX/prov_key (text file)
  Key-legend file for Province outlines
TEXT_UX/pol_key (text file)
  Key-legend file for International boundaries
TEXT_UX/map_key (text file)
  Base key file for map legend
TEXT_UX/oil_key (text file)
  Key-legend file for Oil/Gas fields centerpoints
TEXT_UX/afr_shd (text file)
  Shadeset file
TEXT_UX/mapbar (text file)
  AML for drawing scale and scalebar (by B. Beeman)
TEXT_UX/afr_aml (text file)
  AML for ARCEDIT
TEXT_UX/pr_draw (text file)
  AML for Map Composition without geology.
TEXT_UX/afr_menu (text file)
  Menu file for geological attributing.
TEXT_UX/lut_txt (text file)
  Text file for look-up table that keeps symbols for every "glg" value.
TEXT_UX/afr_lut (text file)
  INFO Look-up table for POLYGONSHADE of "glg" item.
TEXT_UX/block_r (text file)
  Text for Projection description
TEXT_UX/fnt034 (text file)
  Pattern for afr_shd shadeset
TEXT_UX/of_name (text file)
  Open File report Number
TEXT_UX/ds_claim (text file)
  Text for disclaimer
TEXT_MAC (directory)
  same contents as TEXT_UX but with CR only at the end of each line
TEXT_PC (directory)
  same contents as TEXT_UX but with CR LF at the end of each line
VIEWS (directory)
  Data in formats compatible with ARCVIEW 3.0
VIEWS/afr_all.apr (directory)
  Project file for use with ARCVIEW 3.0
VIEWS/geo2_7.shp, .shx, .dbf (shapefile)
  Surficial geology in shapefile format
VIEWS/fld2_7.shp, .shx, .dbf (shapefile)
  Oil and gas field centerpoints in shapefile format
VIEWS/prov2_7.shp, .shx, .dbf (shapefile)
  Geologic provinces in shapefile format
VIEWS/llf2_7.shp, .shx, .dbf (shapefile)
  Graticule of latitude and longitude lines 4 x 6 degrees
  in shapefile format
VIEWS/pol2_7.shp, .shx, .dbf (shapefile)
  Country boundaries in shapefile format
VIEWS/afr_geol.avl (ARCVIEW legend file)
  index names for geologic age
VIEWS/afr_age.avl (ARCVIEW legend file)
  geologic names without index
adob_aml (AML file)
  Commands used to produce complete Map Composition at a
  scale 1:12,500,000 by using ARCPLOT subsystem and to plot
  Map Composition automatically on HP650C plotter

Data_Set_Structure:

Data_Set_Part:

Part_Name: COVER

Part_Type: directory

Part_Description:

Contains original UNIX ARC/INFO (ver. 7.0.4) coverages in Robinson projection. The ARC/INFO coverages are supplemented by several files (total 30) in ARC/INFO INTERCHANGE format (where it was available). These files allow user to produce complete Map Composition of data at a scale 1:12,500,000 by using ARCPLOT subsystem.

Data_Set_Part:

Part_Name: geo2_7
Part_Type: coverage
Part_Description: Surficial geology. Item "glg" in Feature Attribute Table.

Data_Set_Part:

Part_Name: prov2_7
Part_Type: coverage
Part_Description:: Geological Provinces that outline areas with common geological structures and petroleum systems. There are two additional items in the FAT, "code" - Geologic Province code and "name" - Geologic Province name.

Data_Set_Part:

Part_Name: fld2_7
Part_Type: coverage
Part_Description: Centerpoints of Oil and Gas fields.

Data_Set_Part:

Part_Name: pol2_7
Part_Type: coverage
Part_Description: Country boundaries.

Data_Set_Part:

Part_Name: llf2_7
Part_Type: coverage
Part_Description: Latitude/Longitude grid with cell size 4 * 6 degree.

Data_Set_Part:

Part_Name: reg_2_7
Part_Type: coverage
Part_Description:: Boundary between region 2 (Middle East/North Africa and 7 (Sub Saharan Africa). These regions are two of the eight regional subdivisions in the USGS Oil and Gas assessment of the World.

Data_Set_Part:

Part_Name: anno2_7
Part_Type: coverage
Part_Description: Annotations for ocean names.

Data_Set_Part:

Part_Name: shore2_7
Part_Type: coverage
Part_Description: Shoreline for Africa and surrounding areas

Data_Set_Part:

Part_Name: EXPRT_UX
Part_Type: directory
Part_Description:: This directory contains several subsets of the data in export and ungenerate formats for use on UNIX systems: (1) ARC/INFO EXPORT data set (Robinson projection) consisting of eight files in ARC/INFO INTERCHANGE format (*.e00 files without compression). File names are correspondent to the original coverages names (see directory COVER). (2) ARC/INFO UNGENERATE files (ASCII comma delimeted) for four major coverages (*.gen extention). File names correspond to the original coverage names. (3) Attribute files (*.csv extention). Contains ASCII, comma delimeted files for the five feature attribute tables of the ARC/INFO coverages.

Data_Set_Part:

Part_Name: EXPRT_PC
Part_Type: directory
Part_Description: same contents as EXPRT_UX but for PC's not running UNIX.

Data_Set_Part:

Part_Name: PLOT

Part_Type: directory

Part_Description: Files to facilitate plotting and printing the map.

Data_Set_Part:

Part_Name: afr_map
Part_Type: directory
Part_Description:: Complete map composition for use in ARC/INFO ARCPLOT, a collection of *.gra files.

Data_Set_Part:

Part_Name: prov2_7
Part_Type: directory
Part_Description:: Complete map composition without geology for use in ARC/INFO ARCPLOT, a collection of *.gra files.

Data_Set_Part:

Part_Name: afr.hp2
Part_Type: file
Part_Description: Plot file for all the data in HPGL2 format.

Data_Set_Part:

Part_Name: provs.hp2
Part_Type: file
Part_Description: Plot file for data without geology in HPGL2 format.

Data_Set_Part:

Part_Name: TEXT_UX

Part_Type: directory

Part_Description:

Data_Set_Part:

Part_Name: plot_aml
Part_Type: text file
Part_Description:: AML file to produce complete Map Composition at a scale 1:12,500,000 and to plot map composition automatically on HP650C plotter. To use this file the user must set actual full path name to the data or copy all the files to single directory (by Feliks Persits).

Data_Set_Part:

Part_Name: usgs_lab
Part_Type: text file
Part_Description: USGS headline text

Data_Set_Part:

Part_Name: source
Part_Type: text file
Part_Description: List of all the sources of the data

Data_Set_Part:

Part_Name: authors
Part_Type: text file
Part_Description: Who participated in Data Set creation.

Data_Set_Part:

Part_Name: pol_txt
Part_Type: text file
Part_Description:: Text indicating political boundaries are for reference and are not definitive in any manner.

Data_Set_Part:

Part_Name: geo_rob
Part_Type: text file
Part_Description: Command file for PROJECT (Geographic to Robinson).

Data_Set_Part:

Part_Name: tr_rob
Part_Type: text file
Part_Description: Command file for PROJECT (Transverse Mercator to Robinson).

Data_Set_Part:

Part_Name: index
Part_Type: text file
Part_Description:: Text for small index map showing Provinces and boundary between regions 2 and 7.

Data_Set_Part:

Part_Name: prov_key
Part_Type: text file
Part_Description: Key-legend file for Province outlines

Data_Set_Part:

Part_Name: pol_key
Part_Type: text file
Part_Description: Key-legend file for International boundaries

Data_Set_Part:

Part_Name: map_key
Part_Type: text file
Part_Description: Base key file for map legend

Data_Set_Part:

Part_Name: oil_key
Part_Type: text file
Part_Description: Key-legend file for Oil/Gas fields centerpoints

Data_Set_Part:

Part_Name: afr_shd
Part_Type: text file
Part_Description: Shadeset file

Data_Set_Part:

Part_Name: mapbar
Part_Type: text file
Part_Description: AML for drawing scale and scalebar (by B. Beeman)

Data_Set_Part:

Part_Name: afr_aml
Part_Type: text file
Part_Description: AML for ARCEDIT

Data_Set_Part:

Part_Name: pr_draw
Part_Type: text file
Part_Description: AML for Map Composition without geology.

Data_Set_Part:

Part_Name: afr_menu
Part_Type: text file
Part_Description: Menu file for geological attributing.

Data_Set_Part:

Part_Name: lut_txt
Part_Type: text file
Part_Description:: Text file for look-up table that keeps symbols for every "glg" value.

Data_Set_Part:

Part_Name: afr_lut
Part_Type: text file
Part_Description: INFO Look-up table for POLYGONSHADE of "glg" item.

Data_Set_Part:

Part_Name: block_r
Part_Type: text file
Part_Description: Text for Projection description

Data_Set_Part:

Part_Name: fnt034
Part_Type: text file
Part_Description: Pattern for afr_shd shadeset

Data_Set_Part:

Part_Name: of_name
Part_Type: text file
Part_Description: Open File report Number

Data_Set_Part:

Part_Name: ds_claim
Part_Type: text file
Part_Description: Text for disclaimer

Data_Set_Part:

Part_Name: TEXT_MAC
Part_Type: directory
Part_Description:: same contents as TEXT_UX but with CR only at the end of each line

Data_Set_Part:

Part_Name: TEXT_PC
Part_Type: directory
Part_Description: same contents as TEXT_UX but with CR LF at the end of each line

Data_Set_Part:

Part_Name: VIEWS

Part_Type: directory

Part_Description: Data in formats compatible with ARCVIEW 3.0

Data_Set_Part:

Part_Name: afr_all.apr
Part_Type: directory
Part_Description: Project file for use with ARCVIEW 3.0

Data_Set_Part:

Part_Name: geo2_7.shp, .shx, .dbf
Part_Type: shapefile
Part_Description: Surficial geology in shapefile format

Data_Set_Part:

Part_Name: fld2_7.shp, .shx, .dbf
Part_Type: shapefile
Part_Description: Oil and gas field centerpoints in shapefile format

Data_Set_Part:

Part_Name: prov2_7.shp, .shx, .dbf
Part_Type: shapefile
Part_Description: Geologic provinces in shapefile format

Data_Set_Part:

Part_Name: llf2_7.shp, .shx, .dbf
Part_Type: shapefile
Part_Description:: Graticule of latitude and longitude lines 4 x 6 degrees in shapefile format

Data_Set_Part:

Part_Name: pol2_7.shp, .shx, .dbf
Part_Type: shapefile
Part_Description: Country boundaries in shapefile format

Data_Set_Part:

Part_Name: afr_geol.avl
Part_Type: ARCVIEW legend file
Part_Description: index names for geologic age

Data_Set_Part:

Part_Name: afr_age.avl
Part_Type: ARCVIEW legend file
Part_Description: geologic names without index

Data_Set_Part:

Part_Name: adob_aml
Part_Type: AML file
Part_Description:: Commands used to produce complete Map Composition at a scale 1:12,500,000 by using ARCPLOT subsystem and to plot Map Composition automatically on HP650C plotter

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1997

Currentness_Reference: publication date

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -17.4
East_Bounding_Coordinate: 63.36
North_Bounding_Coordinate: 38.3
South_Bounding_Coordinate: -37.1

Keywords:

Theme:

Theme_Keyword_Thesaurus: none
Theme_Keyword: Oil
Theme_Keyword: Gas
Theme_Keyword: Geology

Place:

Place_Keyword_Thesaurus: none
Place_Keyword: Africa

Theme:

Theme_Keyword_Thesaurus: National Geologic Map Database Catalog themes, augmented
Theme_Keyword: 2500 - Political Boundaries
Theme_Keyword: 1400 - Resources
Theme_Keyword: 1403 - Fuels
Theme_Keyword: 1100 - Geology
Theme_Keyword: 1101 - General

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: geoscientificInformation

Place:

Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4, version 1.0
Place_Keyword: LD50 = Africa

Access_Constraints: None

Use_Constraints: None

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey, Central Energy Resource Team
Contact_Person: Dr. Thomas Ahlbrandt

Contact_Position: Project Chief

Contact_Address:

Address_Type: mailing and physical address
Address:: Mail Stop 939
Box 25046
Denver Federal Center
City: Denver
State_or_Province: Colorado
Postal_Code: 80225
Country: USA

Contact_Voice_Telephone: 303-236-5776

Contact_Facsimile_Telephone: 303-236-8822

Contact_Electronic_Mail_Address: ahlbrandt@usgs.gov

Data_Set_Credit:

Digital Map Compilation - Feliks Persits
Geological Attribution - Feliks Persits, Thomas Ahlbrandt, Michelle Tuttle, Ronald Charpentier, Michael Brownfield
Province Boundaries: Region 2 - Thomas Ahlbrandt, Region 7 - Michelle Tuttle
Province Boundaries Digital Compilation - Lee Osmonson
Oil and Gas Database - Tim Klett

Native_Data_Set_Environment:

Hardware: Sun Sparc Server 1000 with Solaris 2.5.1 GIS software: Workstation ARC/INFO ver. 7.0.4 Set of subdirectories of 382 MB total size

Cross_Reference:

Citation_Information:

Originator:

Commission for the Geological Map of the World (CGMW) International Geological Mapping Bureau (BRGM), UNESCO

Publication_Date: 1990

Title: International Geological Map of Africa

Geospatial_Data_Presentation_Form: map

Publication_Information:

Publication_Place: Paris, France
Publisher: CGMW and UNESCO with the financial support of BRGM

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Overall accuracy based on accuracy of general geology coverage. The scanned images of each of five sheets of original paper map (from UNESCO base geologic map) were transformed to Transverse Mercator projection with RMS error not more than 2500 m (0.5 mm in original paper map). No rubber transformation applied. Gray-scale images were used as a background in ARCEDIT digitizing. Maximum shift a line in a coverage from centerline of its copy on image did not exceed 1500-1700 m. Final plot of 1:5,000,000 scale was superimposed on a top of original map, maximum error did not exceed 3500 m.

Quantitative_Attribute_Accuracy_Assessment:

Attribute_Accuracy_Value:: Standard ARC/INFO attributes accuracy in Feature Attributes Tables like AREA, PERIMETER, etc. depend on horizontal positional Accuracy (Section 2.4.1.1). All the additional attributes are character type.
Attribute_Accuracy_Explanation:: All the Attributes besides standard ARC/INFO are character type. Standard verification of attributes reliability has been done by ARC/INFO EDITPLOT program to find out polygons without assigned character value or with more than one value.

Logical_Consistency_Report:

Since Data set is collection of ARC/INFO coverages topological consistency are supported. Fuzzy tolerance has been maintained the same through all processing steps. Based on fuzzy tolerance value all undershoots and overshoots were detected and deleted. A comparison between color plot and original paper map was carried out by visual comparison. Color plots in 1:5,000,000 scale were superimposed on every of correspondent original map sheets. All detected errors in attributes were corrected.

Completeness_Report:

The generalizations of original geological map (UNESCO) were carried out: 1. Several geological age subdivisions on original (UNESCO) 1:5,000,000 geological map were combined into single units. For example, all Cretaceous combined into one unit. 2. All the Precambrian subdivisions were combined into one unit. This version of Geologic Province Boundaries are correct as of July, 1997.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

1. Original geological maps are of 500 m. maximum accuracy (0.1 mm on paper map of 1:5,000,000 scale) 2. Scanned images were of 200 dot/inch resolution (0.12 mm on paper). That is why fuzzy tolerance for CLEAN program in ARC/INFO was set to 500 m. Average positional accuracy can be evaluated as 1000 m (twice of fuzzy tolerance).

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: 1000
Horizontal_Positional_Accuracy_Explanation: meters

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: CGMW and UNESCO

Publication_Date: 1990

Title: International Geologic Map of Africa

Edition: 1987-1990

Geospatial_Data_Presentation_Form: map

Publication_Information:

Publication_Place: Paris,France
Publisher: CGMW and UNESCO

Source_Scale_Denominator: 5,000,000

Type_of_Source_Media: Paper

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1987
Ending_Date: 1990

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Paper Geologic Map

Source_Contribution:

All the five paper map sheets are used as the sources for creation the correspondent ARC/INFO coverages.

Source_Information:

Source_Citation:

Citation_Information:

Originator: USGS, Central Region
Publication_Date: unpublished material
Title: Binary and gray-scale images
Geospatial_Data_Presentation_Form: map
Other_Citation_Details: Intermediate data

Source_Scale_Denominator: 5,000,000

Type_of_Source_Media: online

Source_Citation_Abbreviation: Scanned images

Source_Contribution: Used as a background for digitizing in ARCEDIT.

Source_Information:

Source_Citation:

Citation_Information:

Originator: USGS, Central Region, World Energy Resource Team

Publication_Date: Unpublished material

Title: Mylar

Publication_Information:

Publication_Place: unpublished material

Other_Citation_Details: Intermediate data

Source_Scale_Denominator: 5,000,000

Type_of_Source_Media: Stable-base material

Source_Citation_Abbreviation: Mylar

Source_Contribution:

Mylar used to extract geological boundaries from original paper map and produce binary scanned image.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Petroconsultants International Data Corp.

Publication_Date: 1996

Title: PetroWorld Database

Geospatial_Data_Presentation_Form: map

Publication_Information:

Publication_Place: Geneva, Switzerland
Publisher: Petroconsultants International Data Corp.

Other_Citation_Details:

All data in Petroworld Database use Latitude and Longitude coordinates in Decimal Degrees.

Type_of_Source_Media: CD-ROM

Source_Citation_Abbreviation: Centerpoints of Oil and Gas Fields

Source_Contribution:

Centerpoints of Oil and Gas Fields were reprojected to Robinson Projection and used as the layer on final ARC/INFO Map Composition.

Source_Information:

Source_Citation:

Citation_Information:

Originator: ESRI

Title: ArcWorld 1:3 million geographical data set.

Publication_Information:

Publication_Place: Redlands, CA, USA
Publisher: ESRI

Other_Citation_Details:

There are many informational layers in this data set. Coordinates are Latitude and Longitude in Decimal Degrees.

Source_Scale_Denominator: 3000000

Type_of_Source_Media: CD-ROM

Source_Citation_Abbreviation: Country boundaries

Source_Contribution:

The external source for country boundaries in ARC/INFO final Map Composition.

Process_Step:

Process_Description: Paper geological map digitizing.

Source_Used_Citation_Abbreviation: Paper Geologic Map

Process_Date: 1996

Source_Produced_Citation_Abbreviation:

Transparent mylar copy, Binary and gray-scale images

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey, Central Region
Contact_Person: Feliks Persits

Contact_Position: USGS contractor

Contact_Address:

Address_Type: mailing and physical address
Address:: U.S. Geological Survey
Energy Resource Program
Denver Federal Center, MS 939
City: Denver
State_or_Province: Colorado
Postal_Code: 80225
Country: USA

Contact_Voice_Telephone: 303-236-4608

Contact_Electronic_Mail_Address: fpersits@usgs.gov

Hours_of_Service: 9 a.m. - 5 p.m. local time U.S. Rocky Mountain Time Zone

Process_Step:

Process_Description:: Scanning mylars and original paper maps on large format Anatech Eagle scanner. There were two copies of every map sheet - binary (after mylar scanning) and gray-scale (after original map scanning). Both image copies were in TIFF format at 200 dot/inch resolution.
Source_Used_Citation_Abbreviation: Paper geological maps
Source_Used_Citation_Abbreviation: Mylars
Process_Date: 1997

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Area point

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Robinson

Robinson:

Longitude_of_Projection_Center: 0
False_Easting: 0
False_Northing: 0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 1
Ordinate_Resolution: 1

Planar_Distance_Units: meters

Geodetic_Model:

Ellipsoid_Name: Sphere
Semi-major_Axis: 6370997
Denominator_of_Flattening_Ratio: 1.0

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.006
Longitude_Resolution: 0.006
Geographic_Coordinate_Units: Decimal Degrees

Geodetic_Model:

Ellipsoid_Name: Sphere
Semi-major_Axis: 6370997
Denominator_of_Flattening_Ratio: 1.0

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Polygon of surficial geology
Entity_Type_Definition:: Polygon features in coverage geo2_7 and corresponding ARCVIEW shape file geo2_7.dbf
Entity_Type_Definition_Source: USGS

Attribute:

Attribute_Label: glg

Attribute_Definition:

Geologic series. These values can be used with Look-up table /text/afr_lut in ARC/INFO or with legend file (.avl in ARCVIEW to plot colored geological map.

Attribute_Definition_Source: USGS, values taken from original map legend.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Q
Enumerated_Domain_Value_Definition: Quaternary

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qe

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qp

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: QT
Enumerated_Domain_Value_Definition: Quaternary or Tertiary

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: T
Enumerated_Domain_Value_Definition: Tertiary

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Mz
Enumerated_Domain_Value_Definition: Mesozoic

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: TK
Enumerated_Domain_Value_Definition: Triassic - Cretaceous

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: K
Enumerated_Domain_Value_Definition: Cretaceous

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kl

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: KJ
Enumerated_Domain_Value_Definition: Cretaceous - Jurassic

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: J
Enumerated_Domain_Value_Definition: Jurassic

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Jl

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: JTr
Enumerated_Domain_Value_Definition: Jurassic - Triassic

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Tr
Enumerated_Domain_Value_Definition: Triassic

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Trl

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Pz
Enumerated_Domain_Value_Definition: Paleozoic

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: MzPz
Enumerated_Domain_Value_Definition: Mesozoic - Paleozoic

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: P
Enumerated_Domain_Value_Definition: Permian

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: TrP
Enumerated_Domain_Value_Definition: Triassic - Permian

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: KC

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: PC

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: JC

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: C
Enumerated_Domain_Value_Definition: Carboniferous

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: CD
Enumerated_Domain_Value_Definition: Carboniferous - Devonian

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Du

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: D
Enumerated_Domain_Value_Definition: Devonian

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: DS
Enumerated_Domain_Value_Definition: Devonian - Silurian

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: S
Enumerated_Domain_Value_Definition: Silurian

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: SO
Enumerated_Domain_Value_Definition: Silurian - Ordovician

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: O
Enumerated_Domain_Value_Definition: Ordovician

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: OCm
Enumerated_Domain_Value_Definition: Ordovician - Cambrian

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Cm
Enumerated_Domain_Value_Definition: Cambrian

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: pC
Enumerated_Domain_Value_Definition: Precambrian

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: PzpC

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qv

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Ti

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Mi

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: MiPi

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Pi

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kimb
Enumerated_Domain_Value_Definition: Kimberlite

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Salt Dome

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Unmapped area

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Open water

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Sea

Detailed_Description:

Entity_Type:

Entity_Type_Label: Geologic Province outlines
Entity_Type_Definition:: Polygons in coverage prov2_7 and corresponding ARCVIEW shape file prov2_7.dbf
Entity_Type_Definition_Source: USGS

Attribute:

Attribute_Label: code

Attribute_Definition: Arbitrary, unique, integer geologic province code

Attribute_Definition_Source: USGS

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 7000
Range_Domain_Maximum: 7999

Attribute:

Attribute_Label: name
Attribute_Definition: Name of geologic province (character)
Attribute_Definition_Source:: USGS unique subdivisions of petroleum geology for African continent.

Detailed_Description:

Entity_Type:

Entity_Type_Label: Centerpoints of Oil and Gas fields
Entity_Type_Definition:: Point features in coverage fld2_7 and corresponding ARCVIEW shape file fld2_7.dbf
Entity_Type_Definition_Source: Petroconsultants International Data Corp.

Attribute:

Attribute_Label: Longitude

Attribute_Definition: Centerpoint longitude (attribute value matches geography)

Attribute_Definition_Source: Petroconsultants International Data Corp.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -17.4
Range_Domain_Maximum: 63.36
Attribute_Units_of_Measure: Decimal Degrees
Attribute_Measurement_Resolution: 0.001

Attribute:

Attribute_Label: Latitude

Attribute_Definition: Centerpoint latitude (attribute value matches geography)

Attribute_Definition_Source: Petroconsultants International Data Corp.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -37.1
Range_Domain_Maximum: 38.3
Attribute_Units_of_Measure: Decimal Degrees
Attribute_Measurement_Resolution: 0.001

Attribute:

Attribute_Label: Prov_code
Attribute_Definition: Integer unique value for each province.
Attribute_Definition_Source: Petroconsultants International Data Corp.

Attribute:

Attribute_Label: Fie_id
Attribute_Definition: Integer unique value for each field.
Attribute_Definition_Source: Petroconsultants International Data Corp.

Overview_Description:

Entity_and_Attribute_Overview:: ARC/INFO coverage named /cover/pol2_7 and ARCVIEW shape file /views/pol2_7 created from ESRI's ArcWorld 1:3 million Map. This is a line coverage with many Items in Arc Attribute Tables. These Items are of minor importance for this Project.
Entity_and_Attribute_Detail_Citation: This is ESRI's ArcWorld 1:3 million ARC/INFO coverage.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: USGS Information Services

Contact_Address:

Address_Type: mailing and physical address
Address:: U.S. Geological Survey
Box 25286, Building 810
Denver Federal Center
City: Denver
State_or_Province: Colorado
Postal_Code: 80225
Country: USA

Contact_Voice_Telephone: 1-888-ASK-USGS

Contact_Facsimile_Telephone: 303-202-4693

Contact_Electronic_Mail_Address: infoservices@usgs.gov

Resource_Description: USGS Open-File Report 97-470A

Distribution_Liability:

Although these data have been processed on computer system at the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the Geological Survey regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARCE and ungenerate
Format_Version_Number: 7.0.4
Format_Information_Content: Coverages

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM
Recording_Format: ISO 9660

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARCVIEW Shapefiles
Format_Version_Number: 1.0
Format_Information_Content: shapefiles

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM
Recording_Format: ISO 9660

Fees: See <http://mapping.usgs.gov/esic/prices/index.html>

Technical_Prerequisites:

To use coverage data you need to have ARC/INFO ver. 7.0.4 or higher installed. To use ARCVIEW data you need to have ARCVIEW 3.0 installed. If you dont't have ARC/INFO other similar data set is available in Adobe Systems, Inc., Portable Document Format(TM) (PDF). (You must download and install the Adobe(R) Reader, available at no charge from Adobe Systems, to view and print this version.)