Metadata: Identification_Information: Citation: Citation_Information: Originator: Douglas S. Aitken Publication_Date: 1997 Title: A digital version of the 1970 US Geological Survey topographic map of the San Francisco Bay region, three sheets, 1:125,000 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 97-500 Online_Linkage: http://pubs.usgs.gov/of/1997/of97-500/ Description: Abstract: This Open-File report is a digital topographic map database. It contains a digital version of the 1970 U.S. Geological Survey topographic map of the San Francisco Bay Region (3 sheets), at a scale of 1:125,000. Purpose: To provide a digital topographic map of the San Francisco Bay region to the public. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1997 Currentness_Reference: publication date Status: Progress: complete Maintenance_and_Update_Frequency: none planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -123.75 East_Bounding_Coordinate: -122.63 North_Bounding_Coordinate: 38.88 South_Bounding_Coordinate: 37.88 Access_Constraints: none Use_Constraints: none Keywords: Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: geography Theme_Keyword: topographic maps Theme_Keyword: topography Theme_Keyword: geospatial datasets Theme: Theme_Keyword_Thesaurus: National Geologic Map Database Catalog themes, augmented Theme_Keyword: 3400 - Graphical Theme_Keyword: 3100 - Vector Theme_Keyword: 3420 - PostScript Theme_Keyword: 3110 - ESRI Theme_Keyword: 3112 - export 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 Place_Keyword: f06045 = Mendocino Place_Keyword: f06033 = Lake Place_Keyword: f06113 = Yolo Place_Keyword: f06055 = Napa Place_Keyword: f06097 = Sonoma Place_Keyword: f06041 = Marin Place_Keyword: f06095 = Solano Place_Keyword: f06013 = Contra Costa Place_Keyword: f06001 = Alameda Place_Keyword: f06077 = San Joaquin Place_Keyword: f06099 = Stanislaus Place_Keyword: f06047 = Merced Place_Keyword: f06069 = San Benito Place_Keyword: f06081 = San Mateo Place_Keyword: f06085 = Santa Clara Place_Keyword: f06087 = Santa Cruz Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Aitken, Douglas S Contact_Organization: USGS-NMD Contact_Address: Address_Type: mailing and physical address Address: Mail Stop 531, USGS 345 Middlefield Rd City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: US Contact_Voice_Telephone: 650-329-4388 Contact_Electronic_Mail_Address: daitken@usgs.gov Native_Data_Set_Environment: ARC/INFO version 5.x and 6.x Data_Quality_Information: Logical_Consistency_Report: Compiled from the 1970 US Geological Survey topographic map. Completeness_Report: Complete topographic representation. Lineage: Process_Step: Process_Description: The topographic map information was digitized from stable originals (cronaflex mylar blackline positives) of the map separates at 1:125,000 scale. The following separates were scanned: >1. Composite of the culture, culture-names, land net and primary roads >2. Composite of the drainage and drainage names >3. Composite of intermediate and index contours >4. Secondary roads Scanning was done on a Scitex R280 at a resolution of 20 points/millimeter (508 dpi). The Scitex R280 was used to edit the raster scans and to separate the index and intermediate contours into separate coverages. The raster scans were then vectorized on the Scitex R280 with a curvetype of 1 and a tolerance of 1. The vectorization process distorts characters representing letters and numbers, as well as some other symbols, rendering them unreadable in some instances. The vectorized scans were imported into ARC/INFO using the SCITEXLINE command. ARC/INFO was used to modify edge joins, and to remove duplicate names (in adjacent sheets) and marginal information (to allow for mosaicing of adjacent sheets). Each file was converted from digitizer inches to UTM meters using latitude/longitude intersections on the scanned separates as reference points. Process_Date: 1970-1997 Process_Step: Process_Description: Creation of original metadata record Process_Date: 20090608 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jennifer Lenz Contact_Organization: US Geological Survey Contact_Address: Address_Type: mailing Address: 12201 Surise Valley Drive, Mail Stop 918 City: Reston State_or_Province: VA Postal_Code: 20192 Country: USA Contact_Voice_Telephone: 703-648-6974 Contact_Facsimile_Telephone: 703-648-6560 Contact_Electronic_Mail_Address: pschweitzer@usgs.gov 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: 10 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -123 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: unknown Ordinate_Resolution: unknown Planar_Distance_Units: meters Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Only ARC/INFO internal attribute values. Entity_and_Attribute_Detail_Citation: For more information download the file sftopo.txt Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Information Services Contact_Address: Address_Type: mailing Address: Box 25286, Denver Federal Center City: Denver State_or_Province: Colorado Postal_Code: 80255-0046 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Facsimile_Telephone: 1-303-202-4695 Contact_Electronic_Mail_Address: infoservices@usgs.gov Resource_Description: US Geological Survey Open-File Report 97-500 Distribution_Liability: This report is preliminary and has not been reviewed for conformity with U. S. Geological Survey editorial standards or 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. Government. This database, identified as "A digital version of the 1970 U.S. Geological Survey topographic map of the San Francisco Bay Region, three sheets, 1:125,000," has been approved for release and publication by the Director of the USGS. Although this database has been reviewed and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. This database is released on condition that neither the USGS nor the U. S. Government may be held liable for any damages resulting from its use. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE Format_Version_Number: 7.x Format_Information_Content: >ARC/INFO coverage Description of coverage > >Sheet 1 (sht1.tar.gz) >sh1c.e00 Culture >sh1d.e00 Drainage >sh1ir.e00 Intermediate contours >sh1ix.e00 Index contours >sh1r.e00 Roads File_Decompression_Technique: gzip and tar Transfer_Size: 9 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/1997/of97-500/sht1.tar.gz Digital_Form: Digital_Transfer_Information: Format_Name: ARCE Format_Version_Number: 7.x Format_Information_Content: >ARC/INFO coverage Description of coverage > >Sheet 2 (sht2.tar.gz) >sh2c.e00 Culture >sh2d.e00 Drainage >sh2ir.e00 Intermediate contours >sh2ix.e00 Index contours >sh2r.e00 Roads File_Decompression_Technique: gzip and tar Transfer_Size: 18.3 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/1997/of97-500/sht2.tar.gz Digital_Form: Digital_Transfer_Information: Format_Name: ARCE Format_Version_Number: 7.x Format_Information_Content: >ARC/INFO coverage Description of coverage > >Sheet 3 (sht3.tar.gz) >sh3c.e00 Culture >sh3d.e00 Drainage >sh3ir.e00 Intermediate contours >sh3ix.e00 Index contours >sh3r.e00 Roads File_Decompression_Technique: gzip and tar Transfer_Size: 24.3 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/1997/of97-500/sht3.tar.gz Fees: none Metadata_Reference_Information: Metadata_Date: 20160205 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter N Schweitzer Contact_Organization: USGS Midwest Area Contact_Position: Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/ Contact_Address: Address_Type: mailing address Address: Mail Stop 954 12201 Sunrise Valley Dr City: Reston State_or_Province: VA Postal_Code: 20192-0002 Country: USA Contact_Voice_Telephone: 703-648-6533 Contact_Facsimile_Telephone: 703-648-6252 Contact_Electronic_Mail_Address: pschweitzer@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998