Back to previous Surface Geology Geo2_7t - ArcInfo coverage (Mercator projection), Geo2_7g - ArcInfo coverage (Geographic coordinates), geo2_7.shp - ArcView shape file back to main metadata file Metadata: * Identification_Information <#1> * Data_Quality_Information <#2> * Spatial_Data_Organization_Information <#3> * Spatial_Reference_Information <#4> * Entity_and_Attribute_Information <#5> * Distribution_Information <#6> * Metadata_Reference_Information <#7> ------------------------------------------------------------------------ /Identification_Information:/ /Citation:/ /Citation_Information:/ /Originator:/ U.S. Geological Survey /Publication_Date:/ 200206 /Publication_Time:/ Unknown /Title:/ Map showing Geology, Oil and Gas Fields, and Geologic Provinces of Africa, version 2.0 /Edition:/ 2 /Geospatial_Data_Presentation_Form:/ vector digital data /Online_Linkage:/ /Description:/ /Abstract:/ geo2_7 - Surficial geology. ArcInfo polygon coverage. Item "glg" in Feature Attribute Table (FAT) is for geologic age. /Purpose:/ The Data provide Government, geological community, consultants, and public with information on geologic basis of African continent. It intented to use as a reference spatial data. /Time_Period_of_Content:/ /Time_Period_Information:/ /Single_Date/Time:/ /Calendar_Date:/ 2002 /Currentness_Reference:/ publication date /Status:/ /Progress:/ Complete /Maintenance_and_Update_Frequency:/ None planned /Spatial_Domain:/ /Bounding_Coordinates:/ /West_Bounding_Coordinate:/ -22.413353 /East_Bounding_Coordinate:/ 64.540365 /North_Bounding_Coordinate:/ 40.003867 /South_Bounding_Coordinate:/ -38.574876 /Keywords:/ /Theme:/ /Theme_Keyword_Thesaurus:/ None /Theme_Keyword:/ Surface geology /Place:/ /Place_Keyword:/ Africa /Access_Constraints:/ None /Use_Constraints:/ None /Point_of_Contact:/ /Contact_Information:/ /Contact_Person_Primary:/ /Contact_Person:/ Feliks Persits /Contact_Organization:/ U.S. Geological Survey, Central Region /Contact_Position:/ U.S.G.S. contractor /Contact_Address:/ /Address_Type:/ mailing and physical address /Address:/ U.S. Geological Survey Energy Resource Team, Box 25046, Denver Federal Center, MS 939 /City:/ Denver /State_or_Province:/ CO /Postal_Code:/ 80225-0046 /Country:/ USA /Contact_Voice_Telephone:/ 303-236-3612 /Contact_Facsimile_Telephone:/ 303-236-8822 /Contact_Electronic_Mail_Address:/ fpersits@usgs.gov /Hours_of_Service:/ 8:00 am - 4:00 pm MST /Browse_Graphic:/ /Browse_Graphic_File_Name:/ africa.pdf /Browse_Graphic_File_Type:/ PDF /Data_Set_Credit:/ Digital Map Compilation - Feliks Persits Geological Attribution - Feliks Persits, Thomas Ahlbrandt, Michelle Tuttle, Ronald Charpentier, Michael Brownfield /Security_Information:/ /Security_Classification:/ Unclassified /Native_Data_Set_Environment:/ Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.1.1.649 ------------------------------------------------------------------------ /Data_Quality_Information:/ /Attribute_Accuracy:/ /Attribute_Accuracy_Report:/ Standard ARC/INFO attributes accuracy in Feature Attributes Tables like AREA, PERIMETER, etc. depend on horizontal positional accuracy. All the additional attributes are character type. /Quantitative_Attribute_Accuracy_Assessment:/ /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 the ARC/INFO coverage 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:/ Several geologic age subdivisions on the original (UNESCO) 1:5,000,000 geologic map were combined into single unit. As of May, 2000 generalizations of the original geologic map (UNESCO) were carried out: 1. All the Cretaceous units were combined into one. 2. All the Precambrian subdivisions were combined into one. 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 m /Lineage:/ /Source_Information:/ /Source_Citation:/ /Citation_Information:/ /Originator:/ Commission for the Geological Map of the World (CGMW) /Publication_Date:/ 1990 /Title:/ Carte géologique internationale de l'Afrique /Edition:/ 1987-1990 /Geospatial_Data_Presentation_Form:/ map /Source_Scale_Denominator:/ 5000000 /Type_of_Source_Media:/ Paper Geologic Map /Source_Time_Period_of_Content:/ /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. /Process_Step:/ /Process_Description:/ Transparent mylar film was used to extract geologic boundaries from paper geologic maps. /Process_Date:/ 1996 /Process_Contact:/ /Contact_Information:/ /Contact_Person_Primary:/ /Contact_Person:/ Dr. Thomas Ahlbrandt /Contact_Organization:/ U.S. Geological Survey /Contact_Position:/ Project Chief /Contact_Voice_Telephone:/ 303-236-5776 /Contact_Facsimile_Telephone:/ 303-236-8822 /Contact_Electronic_Mail_Address:/ ahlbrandt@usgs.gov /Hours_of_Service:/ 8 - 5 MST /Process_Step:/ /Process_Description:/ Scanning mylars on large format Anatech Eagle scanner in binary mode. Vectorizing binary images in UNIX ArcInfo 7.0.1 to produce ArcInfo coverages by GRIDLINE utility. /Source_Used_Citation_Abbreviation:/ Mylar scanning /Process_Date:/ 1996 /Source_Produced_Citation_Abbreviation:/ ArcInfo coverages from binary images /Process_Contact:/ /Contact_Information:/ /Contact_Person_Primary:/ /Contact_Person:/ Ronald Charpentier /Contact_Organization:/ US Geological Survey /Contact_Position:/ Senior Geologist /Contact_Voice_Telephone:/ 303-236-5766 /Contact_Facsimile_Telephone:/ 303-236-8822 /Contact_Electronic_Mail_Address:/ charpentier@usgs.gov /Hours_of_Service:/ 8 - 5 MST /Process_Step:/ /Process_Description:/ Scanning original paper maps on a large format Anatech Eagle scanner in gray-scale mode. /Source_Used_Citation_Abbreviation:/ Paper maps /Process_Date:/ 1997 /Source_Produced_Citation_Abbreviation:/ Gray-scale images /Process_Contact:/ /Contact_Information:/ /Contact_Person_Primary:/ /Contact_Person:/ Feliks Persits /Contact_Organization:/ US Geological Survey /Contact_Position:/ GIS Contractor /Contact_Address:/ /Address_Type:/ mailing and physical address /Address:/ Denver Federal Center, P.O. Box 25046, MS 939 /City:/ Denver /State_or_Province:/ CO /Postal_Code:/ 80225 /Country:/ USA /Contact_Voice_Telephone:/ 303-236-3612 /Contact_Facsimile_Telephone:/ 303-236-8822 /Contact_Electronic_Mail_Address:/ fpersits@usgs.gov /Hours_of_Service:/ 8 - 5 MST /Process_Step:/ /Process_Description:/ Geologic age attributes were assigned to ArcInfo polygon coverage /Source_Used_Citation_Abbreviation:/ ArcInfo coverages from binary images /Process_Date:/ 1996 /Source_Produced_Citation_Abbreviation:/ Attributed ArcInfo coverages from binary images /Process_Contact:/ /Contact_Information:/ /Contact_Person_Primary:/ /Contact_Person:/ Ronald. Charpentier /Contact_Organization:/ US Geologcal Survey /Contact_Position:/ GIS Contractor /Contact_Voice_Telephone:/ 303-236-3612 /Contact_Facsimile_Telephone:/ 303-236-8822 /Contact_Electronic_Mail_Address:/ fpersits@usgs.gov /Hours_of_Service:/ 5 - 8 MST /Process_Step:/ /Process_Description:/ ArcInfo coverages from binary images were transformed to Transverse Mercator projection with central meridian of 16^0 E and scale factor at a central meridian equal to 0.995. /Source_Used_Citation_Abbreviation:/ Attribited ArcInfo coverages /Process_Date:/ 1996 /Source_Produced_Citation_Abbreviation:/ Projected ArcInfo coverages from binary images /Process_Contact:/ /Contact_Information:/ /Contact_Person_Primary:/ /Contact_Person:/ Feliks Persits /Contact_Organization:/ US Geological Survey /Contact_Position:/ GIS Contractor /Contact_Voice_Telephone:/ 303-236-3612 /Contact_Facsimile_Telephone:/ 303-236-8822 /Contact_Electronic_Mail_Address:/ fpersits@usgs.gov /Hours_of_Service:/ 5 - 8 MST /Process_Step:/ /Process_Description:/ Gray-scale images were georeferenced by ArcInfo REGISTER and RECTIFY utilities by using projected ArcInfo coverages from binary images. /Source_Used_Citation_Abbreviation:/ Gray-scale images /Process_Date:/ 1997 /Source_Produced_Citation_Abbreviation:/ Georeferenced gray-scale images /Process_Contact:/ /Contact_Information:/ /Contact_Person_Primary:/ /Contact_Person:/ Feliks Persits /Contact_Organization:/ U.S. Geological Survey /Contact_Position:/ GIS Contractor /Contact_Voice_Telephone:/ 303-236-3612 /Contact_Facsimile_Telephone:/ 303-236-8822 /Contact_Electronic_Mail_Address:/ fpersits@usgs.gov /Hours_of_Service:/ 5 - 8 MST /Process_Step:/ /Process_Description:/ Verification and correction of line work and geologic attributing of projected ArcInfo coverages by using georeferenced gray-scale images as background images in ArcInfo ArcEdit 7.0.2 /Source_Used_Citation_Abbreviation:/ Projected ArcInfo coverages /Process_Date:/ 1997 /Source_Produced_Citation_Abbreviation:/ Corrected ArcInfo coverages /Process_Contact:/ /Contact_Information:/ /Contact_Person_Primary:/ /Contact_Person:/ Feliks Persits /Contact_Organization:/ U.S. Geological Survey /Contact_Position:/ GIS Contractor /Contact_Address:/ /Address_Type:/ mailing and physical address /Address:/ Denver Federal Center, P.O. Box 25046, MS 939 /City:/ Denver /State_or_Province:/ CO /Postal_Code:/ 80225 /Country:/ USA /Contact_Voice_Telephone:/ 303-236-3612 /Contact_Facsimile_Telephone:/ 303-236-8822 /Contact_Electronic_Mail_Address:/ fpersits@usgs.gov /Hours_of_Service:/ 8 - 5 MST /Process_Step:/ /Process_Description:/ Corrected ArcInfo coverages were projected to geographic coordinates and to Mercator projection with a central meridian of 25^0 E by ArcInfo PROJECT utility. /Source_Used_Citation_Abbreviation:/ Corrected ArcInfo coverages /Process_Date:/ 1997 /Source_Produced_Citation_Abbreviation:/ Final ArcInfo coverages in Mercator projection and in geographic coordinates. /Process_Contact:/ /Contact_Information:/ /Contact_Person_Primary:/ /Contact_Person:/ Feliks Persits /Contact_Organization:/ GIS Contractor /Contact_Address:/ /Address_Type:/ mailing and physical address /Address:/ Denver Federal Center, P.O. Box 25046, MS 939 /City:/ Denver /State_or_Province:/ CO /Postal_Code:/ 80225 /Country:/ USA /Contact_Voice_Telephone:/ 303-236-3612 /Contact_Facsimile_Telephone:/ 303-236-8822 /Contact_Electronic_Mail_Address:/ fpersits@usgs.gov /Hours_of_Service:/ 5 - 8 MST ------------------------------------------------------------------------ /Spatial_Data_Organization_Information:/ /Direct_Spatial_Reference_Method:/ Vector /Point_and_Vector_Object_Information:/ /SDTS_Terms_Description:/ /SDTS_Point_and_Vector_Object_Type:/ G-polygon /Point_and_Vector_Object_Count:/ 11977 ------------------------------------------------------------------------ /Spatial_Reference_Information:/ /Horizontal_Coordinate_System_Definition:/ /Planar:/ /Map_Projection:/ /Map_Projection_Name:/ Mercator /Mercator:/ /Standard_Parallel:/ 0.00 /Longitude_of_Central_Meridian:/ 25.00 /False_Easting:/ 0.00 /False_Northing:/ 0.00 /Planar_Coordinate_Information:/ /Planar_Coordinate_Encoding_Method:/ coordinate pair /Coordinate_Representation:/ /Abscissa_Resolution:/ 0.016384 /Ordinate_Resolution:/ 0.016384 /Planar_Distance_Units:/ meters /Geodetic_Model:/ /Horizontal_Datum_Name:/ D_WGS_1984 /Ellipsoid_Name:/ WGS_1984 /Semi-major_Axis:/ 6378137.000000 /Denominator_of_Flattening_Ratio:/ 298.257224 ------------------------------------------------------------------------ /Entity_and_Attribute_Information:/ /Detailed_Description:/ /Entity_Type:/ /Entity_Type_Label:/ geo2_7t_polygon /Attribute:/ /Attribute_Label:/ OBJECTID /Attribute:/ /Attribute_Label:/ Shape /Attribute_Definition:/ Feature geometry. /Attribute_Definition_Source:/ ESRI /Attribute_Domain_Values:/ /Unrepresentable_Domain:/ Coordinates defining the features. /Attribute:/ /Attribute_Label:/ AREA Attribute_Definition: Area of polygon Attribute_Definition_Source: Software computed Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 928710.10 Range_Domain_Maximum: 3067273961704.0 /Attribute:/ /Attribute_Label:/ PERIMETER Attribute_Definition: Perimeter of polygon Attribute_Definition_Source: Software computed Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4588.40 Range_Domain_Maximum: 169603590.891 /Attribute:/ /Attribute_Label:/ GEO2_7T_ Attribute_Definition: Internal ID Attribute_Definition_Source: Software computed Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2 Range_Domain_Maximum: 11978 /Attribute:/ /Attribute_Label:/ GEO2_7T_ID /Attribute_Label:/ GEO2_ID Attribute_Definition: User ID Attribute_Definition_Source: Software computed Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 11994 /Attribute:/ /Attribute_Label:/ GLG Attribute_Definition: Surface Geology Attribute Attribute_Definition_Source: U.S.Geological Survey Enumerated_Domain: "Q" - Quaternary (undivided) "Qe" - Holocene "Qp" - Pleistocene "QT" - Cenozoic "T" - Tertiary "Mz" - Mesozoic "TK" - Tertiary-Cretaceous "K" - Cretaceous "Kl" - Lower Creteceous" "KJ" - Cretaceous-Jurassic "J" - Jurassic "Jl" - Lower Jurassic "JTr" - Jurassic-Triassic "Tr" - Triassic "Trl" - Lower Triassic "MzPz" - Mesozoic-Paleozoic "KC" - Cretaceous-Carboniferous "JC" - Jurassic-Carboniferous "Pz" - Paleozoic "P" - Permian "TrP" - Triassic-Permian "PC" - Permian-Carboniferous "C" - Carboniferous "CD" - Carboniferos-Devonian "D" - Devonian "Du" - Upper/Middle Devonian "DS" - Devonian-Silurian "S" - Silurian "SO" - Silurian-Ordovician "OCm" - Ordovician-Camrian "pCm" - Precambrian "PzpC" - Paleozoic-Precambrian "Qv" - Quaternary Igneous "Ti" - Tertiary Igneous "Mi" - Mesozoic Igneous "MiPi" - Mz-Pz Igneous "Pi" - Paleozoic Igneous "Kimb" - Kimberlites "S_d" - Salt Domes "H2O" - Water (River 0r Lake) "Sea" - Sea "oth"S_d" - Areas outside of African Continent" Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey. /Attribute:/ /Attribute_Label:/ Shape_Length /Attribute_Definition:/ Length of feature in internal units. /Attribute_Definition_Source:/ ESRI /Attribute_Domain_Values:/ /Unrepresentable_Domain:/ Positive real numbers that are automatically generated. /Attribute:/ /Attribute_Label:/ Shape_Area /Attribute_Definition:/ Area of feature in internal units squared. /Attribute_Definition_Source:/ ESRI /Attribute_Domain_Values:/ /Unrepresentable_Domain:/ Positive real numbers that are automatically generated. ------------------------------------------------------------------------ /Distribution_Information:/ /Distributor:/ /Contact_Information:/ / Contact_Organization:/ U.S. Geological Survey Earth Science Information Center (ESIC) /Contact_Person_Primary:Dorothy Tanti/ /Contact_Address:/ /Address_Type:/ mailing and physical address /Address:/ U.S.Geological Survey Box 25046 Building 25 Denver Federal Center /City:/ Denver /State_or_Province:/ CO /Postal_Code:/ 80225-0286 /Country:/ USA /Contact_Voice_Telephone:/ 303.236.1647 /Contact_Electronic_Mail_Address:/ eteamdisks@usgs.gov /Hours_of_Service:/ 8:00 am - 4:00 pm MST /Standard_Order_Process:/ /Digital_Form:/ /Digital_Transfer_Information:/ /Format_Name:/ ARCE /Format_Specification:/ ArcInfo coverage ArcView shape file ARC/INFO Export format ARC/INFO Generate format ASCII file, formatted for text attributes SDTS Spatial Data Transfer Standard (Federal Information Processing Standard 173) ------------------------------------------------------------------------ /Metadata_Reference_Information:/ /Metadata_Date:/ 20011019 /Metadata_Contact:/ / Contact_Information:/ / Contact_Organization_Primary:/ / Contact_Organization: U.S. Geological Survey/ / Contact_Person: David A. Ferderer/ / Contact_Position: Data library manager, Central Energy Resources Team/ / Contact_Address:/ / Address_Type:mailing and physical address/ / Address: U.S. Geological Survey, MS 939 Box 25046 Denver Federal Center/ / City: .Denver/ / State_or_Province: CO./ / Postal_Code: 80225-0046/ / Contact_Voice_Telephone: (303) 236-3611/ / Contact_Facsimile_Telephone: (303) 236-8822/ / Contact_Electronic_Mail_Address: dferdere@usgs.gov/ / Hours_of_Service: 8 am. to 4 pm. MST/ /Metadata_Standard_Name:/ FGDC Content Standards for Digital Geospatial Metadata /Metadata_Standard_Version:/ FGDC-STD-001-1998 /Metadata_Time_Convention:/ local time /Metadata_Extensions:/ /Online_Linkage:/ /Profile_Name:/ ESRI Metadata Profile back to main metadata file ------------------------------------------------------------------------ Generated by mp version 2.7.3 on Fri Oct 19 12:28:18 2001 Back to previous *U. S. Geological Surve Open File Report 97-470A, ver.2*