These digital maps are a reformulation of previously published maps, primarily maps of states. The reformulation gives all the maps the same structure and format, allowing them to be combined into regional maps. The associated data tables have information about age and lithology of the map units, also in a standard format.
Purpose:
Provide digital maps and databases that, because of their common structure and format, allow creation of regional maps that depict age and lithology of map units.
Supplemental_Information:
The data is provided in decimal degrees and in Lambert Conformal Conic projection. The data is provided in both coverage and shapefile format, and includes supplemental attribute tables. No attempt was made to reconcile differences in mapping across state boundaries.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2005
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -125.037620
East_Bounding_Coordinate: -116.233944
North_Bounding_Coordinate: 49.858968
South_Bounding_Coordinate: 44.937264
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: geology
Theme_Keyword: lithology
Theme_Keyword: geologic age
Theme_Keyword: maps
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: USA
Place_Keyword: Washington
Access_Constraints:
No warranty, expressed or implied, is made regarding the accuracy or utility of this data for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of this data.
Use_Constraints:
This database is not meant to be used at scales appreciably larger or smaller than the original scale. Any printed material utilizing these databases shall clearly indicate their source. If modifications to the data are made, this should be clearly indicated and described in print. Users specifically agree not to misrepresent these data, nor to imply that any changes they have made were approved by the U.S. Geological Survey.
This database has been approved for release and publication by the Director of the U.S. Geological Survey. Although the database has been subjected to review and is substantially complete, the U.S. Geological Survey reserves the right to revise the data pursuant to further analysis and review. The database is released on the condition that neither the U.S. Geological Survey or the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Steve Ludington
Contact_Organization: U.S. Geological Survey
Contact_Position: geologist
Contact_Address:
Address_Type: mailing and physical address
Address: U.S. Geological Survey, MS 901
Address: 345 Middlefield Road
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025
Country: USA
Contact_Voice_Telephone: 650.329.5371
Contact_Electronic_Mail_Address:slud@usgs.gov
Data_Set_Credit: U.S. Geological Survey
Security_Information:
Security_Classification: Unclassified
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Map unit designations follow original compilation faithfully. Additional information about age and lithology was obtained from the paper map legend and geologic literature.
Logical_Consistency_Report:
All internal polygons were checked for closure. Overshoots and undershoots have been deleted or corrected as appropriate.
Completeness_Report:
The dataset contains all the map units and faults that were portrayed on the original printed map. Bodies of water are classified as water, and geologic units underlying them are not portrayed.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The geologic map was digitized from compilations ranging in scale from 1:100,000 to 1:1,000,000, and is an accurate representation of the source maps. It is intended to be used at scales equal to or smaller than 1:500,000. Display at significantly larger scales may produce error in location of contacts or faults relative to features contained in other data sets. The state boundary arcs are based on the 1:100,000 scale USGS topographic map series digital line graphs.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: G.L. Raines
Originator: B.R. Johnson
Publication_Date: 1995
Title: USGS OFR 95-684
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: USGS Open-File Reports
Issue_Identification: 95-684
Other_Citation_Details:
Digital representation of the Washington state geologic map: a contribution to the Interior Columbia River basin ecosystem management project
Geospatial_Data_Presentation_Form: vector digital data
Source_Scale_Denominator: 100,000
Type_of_Source_Media: online
Source_Citation_Abbreviation: US001
Source_Contribution: Provided linework for state boundaries
Process_Step:
Process_Description: Dataset copied from original source
Process_Date: 2002
Process_Step:
Process_Description:
Combined the geology and a separate fault coverage into one as follows: 1) Arcs coded as faults in the geology coverage were buffered at a distance of 5 meters, 2) This buffer was used to select duplicate arcs in the fault coverage; they were then deleted, 3) The remaining faults were then imported into the geology coverage, and a copy of the now complete set of arcs was intersected with the original coverage to produce polygon labels for the newly created polygons.
Process_Date: 2002
Process_Step:
Process_Description:
Adjusted the perimeter of the coverage to match a reference dataset of state boundaries derived from 1:100,000 scale digital line graphs. This allows the map to be used together with adjoining state maps referenced to the same boundary data. The state and international boundaries have a source of US001 in the AAT.
Process_Date: 2003
Process_Step:
Process_Description:
Changed map unit labels for 14 polygons to conform to the printed map. These have a source of WA201 through WA214 in the PAT.
Process_Date: 2004-2005
Process_Step:
Process_Description:
Made 13 new polygons to conform to the printed map. These have a source of WA215 through WA227.
Process_Date: 2004-2005
Process_Step:
Process_Description:
To prepare a uniform AAT file, the following items were added: arc-code, arc-para1, and arc-para2. The last two are not used. Arc-code was populated, using the information in the original item, and inspection of the printed map. Then the original items in the AAT were deleted (LINE_TYPE, MODIFIER, ACCURACY, FAULT_CONT, SOURCE_ID, OBJ_TYPE, OBJ_NO, SP_OBJ_ID).
Process_Date: 2004-2005
Process_Step:
Process_Description:
To prepare a uniform PAT file, the following items were added: ORIG_LABEL, SGMC_LABEL, UNIT_LINK, SOURCE, UNIT_AGE, ROCKTYPE1, and ROCKTYPE2. ORIG_LABEL was populated from the original item (PTYPE), SGMC_LABEL and UNIT_LINK were populated with information in the accompanying attribute table AZunits, UNIT_AGE was populated with information in the accompanying attribute table AZage, and ROCKTYPE1 and ROCKTYPE2 were populated with information in the accompanying attribute table AZlith. Then the original items in the PAT were deleted (MAP_UNIT, SOURCE_ID, OBJ_TYPE, OBJ_NO, SP_OBJ_ID, FORMATION).
Resource_Description: U.S. Geological Survey Open-File Report OFR 2005-1305
Distribution_Liability:
This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards, nor with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Geological Survey. Although these data have been used by the U.S. Geological Survey, and imported into appropriate software, no warranty, express or implied, is made by the U.S. Geological Survey as to how successfully or accurately the data can be imported into specific application software running on specific hardware platforms. The fact of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in connection therewith. This data is not meant to be used or displayed at scales substantially larger than 1:500,000.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ArcInfo Export
Format_Version_Number: 8.3
Format_Information_Content: geologic units and structural features