Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1998 Title: hecomp Larger_Work_Citation: Citation_Information: Originator: Wilson, F.H., Dover, J.D., Bradley, D.C., Weber, F.R., Bundtzen, T.K., and Haeussler, P.J. (comp.) Publication_Date: 1998 Title: Geologic map of Central (Interior) Alaska Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open-File Report Issue_Identification: 98-133 Description: Abstract: This coverage represents a compilation of reconnaisance geologic mapping of the Healy quadrangle, Alaska. Purpose: Digital conversion of geologic mapping of the Healy quadrangle, Alaska, was undertaken to generate a 1:500,000 scale digital geologic map of Alaska, and to facilitate the presentation and analysis of earth-science data. Digital maps can be displayed at any scale or projection, however the geological data in this coverage is not intended for use at a scale larger than 1:250,000. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Currentness_Reference: publication date Status: Progress: complete Maintenance_and_Update_Frequency: Unknown Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -150.0 East_Bounding_Coordinate: -147.0 North_Bounding_Coordinate: 64.0 South_Bounding_Coordinate: 63.0 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: geology Theme_Keyword: bedrock Theme_Keyword: compilation Theme_Keyword: reconnaissance Place: Place_Keyword_Thesaurus: None Place_Keyword: Healy Place_Keyword: Alaska Access_Constraints: None Use_Constraints: Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Minerals Resouces Program - Alaska Section Contact_Person: Frederic H. Wilson Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 4200 University Drive City: Anchorage State_or_Province: AK Postal_Code: 99508-4667 Country: USA Contact_Voice_Telephone: 907-561-1181 Contact_Facsimile_Telephone: 907-786-7401 Contact_Electronic_Mail_Address: fwilson@usgs.gov Data_Set_Credit: GIS support by F.H. Wilson Native_Data_Set_Environment: This coverage was created using ESRI ARC/Info version 7 on a Unix platform. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The linework was captured by hand digitizing from a 1:250,000 scale paper map. The arc and polygon attributes are based on the published thematic map. Linework for two-side rivers, large water bodies, ice contacts were hand digitized from a 1:250,000 scale paper topographic map. The data source of each feature is coded in the attribute table. Accuracy of the data capture was evaluated by visual checks against the original publication by a person other than the person who captured the data. This thematic bedrock map depicts geologic units present beneath soil or relatively thin mantles of surficial deposits, not necessarily the surficial materials themselves. Attributes of the polygons provide coding keyed to the original units of the source map, and coding keyed to the generalized geologic units for the compilation of which this map is only a small part of. Logical_Consistency_Report: This coverage is a net coverage containing arcs and polygons. Each polygon has a class attribute classifying bedrock, surficial deposit, or water/ice body. Faults and stratigraphic contacts are represented as arcs. When a fault is also a stratigraphic contact, only a single arc is present. Dangling arcs may be present (faults, dikes, crater rim, etc.) Completeness_Report: This digital map differs from the original published geologic map in several ways. The digital version does not include topography, structural fold axes, annotation, strike and dip symbols, or geochronology sample locations. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Users of this digital geologic map should respect the intentions of the original mappers and the map compilers, and the limitations of the map. The Healy geologic map is intended to be used at a scale of 1:250,000; it is not intended to be used at a more detailed scale. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Csejtey, Bela, Jr. Originator: Mullen, M.W. Originator: Cox, D.P. Originator: Stricker, G.D. Publication_Date: 1992 Title: Geology and geochronology of the Healy quadrangle, south-central Alaska Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Miscellaneous Investigation Series Issue_Identification: Map I-1961 Other_Citation_Details: Csejtey, Bela, Jr., Mullen, M.W., Cox, D.P., and Stricker, G.D., 1992, Geology and geochronology of the Healy quadrangle, south-central Alaska: U.S. Geological Survey Miscellaneous Investigations Map I-1961, 63p. 2 sheets, scale 1:250,000. Source_Scale_Denominator: 250000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1992 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Csejtey and others, 1992 Source_Contribution: Majority of the line work and attributes are based from Csejtey and others, 1992. Process_Step: Process_Description: Linework was captured by hand digitizing from a paper map. The linework was edited and attributed using ARC/Info. The coverage was cleaned, built for polygons, and had labels created and attributed. For the purpose of distribution, the coverage has been converted to an interchange format file using the ARC/Info export command. Process_Date: 1998 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 6 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -147.0 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000. False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 300 Ordinate_Resolution: 300 Planar_Distance_Units: meters Geodetic_Model: Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.9787 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: arc-code Entity_Type_Definition: Arc-code is a positive integer value (3 3 I) item in the arc attribute table. Values range from 0-99. It codes the line type. Explanation of the coding can be found on the CD. Possible line types may include stratigraphic contact, faults, shoreline, ice contact, lineaments, and alteration boundary. Line types representing stratigraphic contacts and faults also describe the level of certainty (certain, approximate, queried). Entity_Type_Definition_Source: Csejtey and others, 1992 Wilson, F.H., and others, 1998 Entity_Type: Entity_Type_Label: class Entity_Type_Definition: Class is a positive integer value (4 5 B) item in the polygon attribute table. Values range from 99 - 29,999. It codes the geologic unit (rock type and geologic age) from Csejtey and others, 1992. The explanation of class is not included with this CD release. Entity_Type_Definition_Source: Csejtey and others, 1992 Entity_Type: Entity_Type_Label: nsaclass Entity_Type_Definition: Nsaclass is a positive integer value (4 5 B) item in the polygon attribute table. Values range from 99 - 29,999. It codes the geologic unit for the 1:500,000 scale geologic map compilation. Explanation of the coding is on the CD. Entity_Type_Definition_Source: Wilson, F.H., and others, 1998 Entity_Type: Entity_Type_Label: source Entity_Type_Definition: Source is a character (6 8 C) item in both the arc and polygon attribute tables. The coded value identifies the original source of the feature. HE001 USGS Alaska Topographic Map Series HE002 Csejtey and others, 1992 Entity_Type_Definition_Source: Wilson, F.H., and others, 1998 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Information Services Contact_Address: Address_Type: mailing address Address: Box 25286 Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: 303-202-4200 or 1-800-USA-MAPS Contact_Facsimile_Telephone: 303-202-4695 Distribution_Liability: This Compact Disc-Read Only Memory (CD-ROM) publication was prepared by an agency of the United States Government. Neither the United States Government nor the agency thereof nor any of their employees make 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, reommendation, or favoring by the United States Government or any agency thereof. Although all data and software published on this CD-ROM have been used by the USGS, no warranty, expressed or implied, is made by the USGS 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 USGS in the use of these data, software, or related materials. Metadata_Reference_Information: Metadata_Date: 19980929 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Mineral Resources Program - Alaska Section Contact_Person: Nora B. Shew Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 4200 University Drive City: Anchorage State_or_Province: AK Postal_Code: 99508-4667 Country: USA Contact_Voice_Telephone: 907-561-1181 Contact_Facsimile_Telephone: 907-786-7401 Contact_Electronic_Mail_Address: nshew@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: June 8, 1994