Metadata: Identification_Information: Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200506 Title: Time Zones of the United States Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Online_Linkage: Description: Abstract: This map layer portrays the time zones of the United States, Puerto Rico, and the U.S. Virgin Islands. Also included are the Greenwich Mean Time offset, and areas in the U.S. where daylight saving time is observed. This is a revised version of the September 2004 map layer. Purpose: These data are intended for geographic display and analysis at the national level, and for large regional areas. The data should be displayed and analyzed at scales appropriate for 1:2,000,000-scale data. No responsibility is assumed by the National Atlas of the United States or the U.S. Geological Survey in the use of these data. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1972 Ending_Date: 2005 Currentness_Reference: Ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: Irregular Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: 170 East_Bounding_Coordinate: -64 North_Bounding_Coordinate: 72 South_Bounding_Coordinate: 17 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: Boundaries Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Time zones Theme_Keyword: Atlantic Theme_Keyword: Eastern Theme_Keyword: Central Theme_Keyword: Mountain Theme_Keyword: Pacific Theme_Keyword: Alaska Theme_Keyword: Hawaii-Aleutian Theme_Keyword: Greenwich Mean Time Theme_Keyword: Daylight Saving Time Place: Place_Keyword_Thesaurus: U.S. Department of Commerce, 1995, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions (Federal Information Processing Standard (FIPS) 10-4): Washington, DC, National Institute of Standards and Technology. Place_Keyword: United States Place: Place_Keyword_Thesaurus: None Place_Keyword: USA Place: Place_Keyword_Thesaurus: U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (FIPS 5-2): Washington, DC, National Institute of Standards and Technology. Place_Keyword: Alabama Place_Keyword: Alaska Place_Keyword: Arizona Place_Keyword: Arkansas Place_Keyword: California Place_Keyword: Colorado Place_Keyword: Connecticut Place_Keyword: Delaware Place_Keyword: District of Columbia Place_Keyword: Florida Place_Keyword: Georgia Place_Keyword: Hawaii Place_Keyword: Idaho Place_Keyword: Illinois Place_Keyword: Indiana Place_Keyword: Iowa Place_Keyword: Kansas Place_Keyword: Kentucky Place_Keyword: Louisiana Place_Keyword: Maine Place_Keyword: Maryland Place_Keyword: Massachusetts Place_Keyword: Michigan Place_Keyword: Minnesota Place_Keyword: Mississippi Place_Keyword: Missouri Place_Keyword: Montana Place_Keyword: Nebraska Place_Keyword: Nevada Place_Keyword: New Hampshire Place_Keyword: New Jersey Place_Keyword: New Mexico Place_Keyword: New York Place_Keyword: North Carolina Place_Keyword: North Dakota Place_Keyword: Ohio Place_Keyword: Oklahoma Place_Keyword: Oregon Place_Keyword: Pennsylvania Place_Keyword: Rhode Island Place_Keyword: South Carolina Place_Keyword: South Dakota Place_Keyword: Tennessee Place_Keyword: Texas Place_Keyword: Utah Place_Keyword: Vermont Place_Keyword: Virginia Place_Keyword: Washington Place_Keyword: West Virginia Place_Keyword: Wisconsin Place_Keyword: Wyoming Place_Keyword: Puerto Rico Place_Keyword: Virgin Islands Place_Keyword: U.S. Virgin Islands Access_Constraints: None Use_Constraints: None. Acknowledgment of the National Atlas of the United States of America and (or) the U.S. Geological Survey would be appreciated in products derived from these data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Greg Manuel Contact_Organization: National Atlas of the United States Contact_Address: Address_Type: Mailing address Address: 12201 Sunrise Valley Drive Address: MS-561 City: Reston State_or_Province: VA Postal_Code: 20192 Contact_Voice_Telephone: 703-648-6433 Contact_Electronic_Mail_Address: atlasmail@usgs.gov Data_Quality_Information: Logical_Consistency_Report: No checks for topological consistency were performed on this map layer. Completeness_Report: This map layer includes time zones for the United States, Puerto Rico, and the U.S. Virgin Islands. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: National Archives and Records Publication_Date: 1997 Title: Code of Federal Regulations, Title 49--Transportation, Subtitle A-- Office of the Secretary of Transportation, Part 71--Standard Time Zone Boundaries Publication_Information: Publication_Place: Washington, DC Publisher: National Archives and Records Administration Online_Linkage: Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1997 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: CFR-TZ Source_Contribution: Spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: National Weather Service Publication_Date: 1999 Title: Counties of the U.S. Publication_Information: Publication_Place: Silver Spring, MD Publisher: National Weather Service Online_Linkage: Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NWS-CNTY Source_Contribution: Spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 1998 Title: County Boundaries of the United States Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Source_Scale_Denominator: 2000000 Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: ATLAS-CNTY Source_Contribution: Spatial information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 1998 Title: Hydrography Features of the United States Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Source_Scale_Denominator: 2000000 Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: ATLAS-HY Source_Contribution: Spatial information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 199907 Title: Public Land Survey System of the United States Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Source_Scale_Denominator: 2000000 Type_of_Source_Media: Internal file Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: ATLAS-PL Source_Contribution: Spatial information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 1998 Title: Railroads of the United States Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Source_Scale_Denominator: 2000000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: ATLAS-RR Source_Contribution: Spatial information Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1985 Title: Goose Creek, NE Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 100000 Type_of_Source_Media: Paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1985 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: GooseCreek-100K Source_Contribution: Spatial information Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1985 Title: Valentine, SD-NE Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 100000 Type_of_Source_Media: Paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1985 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: Valentine-100K Source_Contribution: Spatial information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200001 Title: Time Zones of the United States Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Source_Scale_Denominator: 2000000 Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20000110 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: ATLAS-TZ Source_Contribution: Spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: National Weather Service Publication_Date: 1998 Title: CONUS Time Zones - Splits Publication_Information: Publication_Place: Silver Spring, MD Publisher: National Weather Service Source_Scale_Denominator: 2000000 Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: TZ-SPLIT Source_Contribution: Spatial information Source_Information: Source_Citation: Citation_Information: Originator: National Weather Service Publication_Date: 2002 Title: CONUS and Non CONUS Counties Publication_Information: Publication_Place: Silver Spring, MD Publisher: National Weather Service Source_Scale_Denominator: 2000000 Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20020205 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: C_05FE02 Source_Contribution: Spatial information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200205 Title: Time Zones of the United States Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Source_Scale_Denominator: 2000000 Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 200205 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: ATLAS-TZ02 Source_Contribution: Spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200208 Title: County Boundaries of the United States, 2001 Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Source_Scale_Denominator: 2000000 Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 200208 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: ATLAS-CNTY01 Source_Contribution: Spatial information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200311 Title: Time Zones of the United States Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Source_Scale_Denominator: 2000000 Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 200311 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: ATLAS-TZ03 Source_Contribution: Spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 199911 Title: Major Roads of the United States Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Source_Scale_Denominator: 2000000 Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 199911 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: ATLAS-ROAD Source_Contribution: Spatial information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200401 Title: Time Zones of the United States Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Source_Scale_Denominator: 2000000 Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 200401 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: ATLAS-TZ0401 Source_Contribution: Spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: National Institute of Standards and Technology Publication_Date: Unknown Title: Time and Frequency from A to Z Publication_Information: Publication_Place: Boulder, CO Publisher: National Institute of Standards Technology Online_Linkage: Source_Scale_Denominator: 2000000 Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 200409 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NIST-TF Source_Contribution: Attibute information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200310 Title: Federal Lands and Indian Reservations of the United States Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Source_Scale_Denominator: 2000000 Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 200310 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: ATLAS-FEDLAND Source_Contribution: Spatial information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200409 Title: Time Zones of the United States Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Source_Scale_Denominator: 2000000 Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 200409 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: ATLAS-TZ0409 Source_Contribution: Spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200506 Title: State Boundaries of the United States Publication_Information: Publication_Place: Reston, VA Publisher: National Atlas of the United States Source_Scale_Denominator: 2000000 Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 200506 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: ATLAS-STATES Source_Contribution: Spatial information Process_Step: Process_Description: Following the written descriptions in CFR-TZ, features coincident with time zone lines were extracted from the National Atlas map layers (ATLAS-CNTY, ATLAS-HY, ATLAS-PL, ATLAS-RR). The features were merged into a separate Arc/INFO coverage. Where there were no coincident features, 1:100,000-scale topographic maps (GooseCreek-100K and Valentine-100K) and county data sets (NWS-CNTY) were used as references to digitize the time zone boundaries. The NWS-CNTY data set was also used as a reference to define time zones where counties were divided by standard time zone boundaries. Source_Used_Citation_Abbreviation: CFR-TZ Source_Used_Citation_Abbreviation: NWS-CNTY Source_Used_Citation_Abbreviation: ATLAS-CNTY Source_Used_Citation_Abbreviation: ATLAS-HY Source_Used_Citation_Abbreviation: ATLAS-PL Source_Used_Citation_Abbreviation: ATLAS-RR Source_Used_Citation_Abbreviation: GooseCreek-100K Source_Used_Citation_Abbreviation: Valentine-100K Process_Date: 20000110 Source_Produced_Citation_Abbreviation: ATLAS-TZ Process_Step: Process_Description: Several corrections were made using data obtained from the National Weather Service website. Counties that are split between two time zones were edited using TZ-SPLIT. Other corrections were made using C_05FE02. These corrections are: >1) addition of a small portion of northwestern Cuberson County, TX to > the Mountain time zone. >2) adjustment of a small portion of the Mountain/Central time zone > boundary along the 138N and 139N Township line to the Missouri River > just south of Mandan, Morton County, North Dakota. >3) addition of Wayne County, KY, Morgan County, TN, Harrison County, > IN, Floyd County, IN, and Clark County, IN to the Eastern time zone. In addition, some boundary adjustments were made using National Atlas counties, ATLAS-CNTY, to ensure alignment with county boundaries. Source_Used_Citation_Abbreviation: ATLAS-TZ Source_Used_Citation_Abbreviation: TZ-SPLIT Source_Used_Citation_Abbreviation: C_05FE02 Source_Used_Citation_Abbreviation: ATLAS-CNTY Process_Date: 2002 Source_Produced_Citation_Abbreviation: ATLAS-TZ02 Process_Step: Process_Description: The time zone boundary between the Central time zone and the Mountain time zone was adjusted to place Jones County, Mellette County, and Todd County, SD in the Central time zone. County boundaries were extracted from ATLAS-CNTY01 and used to provide the new time zone boundary. Source_Used_Citation_Abbreviation: ATLAS-TZ02 Source_Used_Citation_Abbreviation: ATLAS-CNTY01 Process_Date: 200311 Source_Produced_Citation_Abbreviation: ATLAS-TZ03 Process_Step: Process_Description: The time zone boundary between the Central time zone and the Mountain time zone was adjusted to place all of Morton County, ND and part of Sioux County, ND east of highway 31 in the Central time zone. County boundaries from ATLAS-CNTY01 and a portion of highway 31 from ATLAS-ROAD were extracted and used to provide the new time zone boundary. Source_Used_Citation_Abbreviation: ATLAS-TZ03 Source_Used_Citation_Abbreviation: ATLAS-CNTY01 Source_Used_Citation_Abbreviation: ATLAS-ROAD Process_Date: 200401 Source_Produced_Citation_Abbreviation: ATLAS-TZ0401 Process_Step: Process_Description: Relying on the information from NIST-TF, the Navajo Indian Reservation within the State of Arizona was brought into ATLAS-TZ0401 from ATLAS- FEDLAND and coded as observing Daylight Saving Time. The Hopi Indian Reservation remains as not observing Daylight Saving Time. Source_Used_Citation_Abbreviation: NIST-TF Source_Used_Citation_Abbreviation: ATLAS-FEDLAND Source_Used_Citation_Abbreviation: ATLAS-TZ0401 Process_Date: 200409 Source_Produced_Citation_Abbreviation: ATLAS-TZ0409 Process_Step: Process_Description: To bring the shorelines into better alignment with the rest of the Atlas data and to add 3 missing islands in Puerto Rico, the shorelines in ATLAS-TZ0409 were replaced with shorelines from ATLAS-STATES. Source_Used_Citation_Abbreviation: ATLAS-STATES Source_Used_Citation_Abbreviation: ATLAS-TZ0409 Process_Date: 200506 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 2835 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000278 Longitude_Resolution: 0.000278 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: GRS1980 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257222 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Time zones (described by timeznp020.dbf) Entity_Type_Definition: Geographic regions within which the same standard time is used. Entity_Type_Definition_Source: National Atlas of the United States Attribute: Attribute_Label: Shape Attribute_Definition: The representation of the entity in the data. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Polygon Enumerated_Domain_Value_Definition: 2-dimensional element. Enumerated_Domain_Value_Definition_Source: ESRI GIS software Attribute: Attribute_Label: Area Attribute_Definition: The size of the shape in coverage units. In the distributed file, coverage units represent square decimal degrees. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.000 Range_Domain_Maximum: 305.704 Attribute: Attribute_Label: Perimeter Attribute_Definition: The perimeter of shape in coverage units. In the distributed file, coverage units represent decimal degrees. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.010 Range_Domain_Maximum: 374.768 Attribute: Attribute_Label: Timeznp020 Attribute_Definition: Internal feature number. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2 Range_Domain_Maximum: 2836 Attribute: Attribute_Label: Timezone Attribute_Definition: The name of the time zone. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Alaska Enumerated_Domain_Value_Definition: The time zone that includes most of Alaska, as defined in the Code of Federal Regulations, Title 49--Transportation, Subtitle A--Office of the Secretary of Transportation, Part 71--Standard Time Zone Boundaries. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Enumerated_Domain: Enumerated_Domain_Value: Atlantic Enumerated_Domain_Value_Definition: The time zone that includes Puerto Rico and the U.S. Virgin Islands, as defined in the Code of Federal Regulations, Title 49-- Transportation, Subtitle A--Office of the Secretary of Transportation, Part 71--Standard Time Zone Boundaries. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Enumerated_Domain: Enumerated_Domain_Value: Central Enumerated_Domain_Value_Definition: The time zone that is east of the Mountain time zone and west of the Eastern time zone, as defined in the Code of Federal Regulations, Title 49--Transportation, Subtitle A--Office of the Secretary of Transportation, Part 71--Standard Time Zone Boundaries. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Enumerated_Domain: Enumerated_Domain_Value: Eastern Enumerated_Domain_Value_Definition: The time zone for the eastern continental United States, between the Atlantic and Central time zones, as defined in the Code of Federal Regulations, Title 49--Transportation, Subtitle A--Office of the Secretary of Transportation, Part 71--Standard Time Zone Boundaries. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Enumerated_Domain: Enumerated_Domain_Value: Hawaii-Aleutian Enumerated_Domain_Value_Definition: The time zone that includes most of the Aleutian Islands and Hawaii, as defined in the Code of Federal Regulations, Title 49- Transportation, Subtitle A--Office of the Secretary of Transportation, Part 71--Standard Time Zone Boundaries. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Enumerated_Domain: Enumerated_Domain_Value: Mountain Enumerated_Domain_Value_Definition: The time zone that is east of the Pacific time zone and west of the Central time zone, as defined in the Code of Federal Regulations, Title 49--Transportation, Subtitle A--Office of the Secretary of Transportation, Part 71--Standard Time Zone Boundaries. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Enumerated_Domain: Enumerated_Domain_Value: Pacific Enumerated_Domain_Value_Definition: The time zone for the western continental United States, west of the Mountain time zone, as defined in the Code of Federal Regulations, Title 49--Transportation, Subtitle A--Office of the Secretary of Transportation, Part 71--Standard Time Zone Boundaries. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Attribute: Attribute_Label: Gmt_offset Attribute_Definition: The number of hours the time is offset from Greenwich Mean Time. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -10 Range_Domain_Maximum: -4 Attribute: Attribute_Label: Gmt_dst_of Attribute_Definition: The number of hours the time is offset from Greenwich Mean Time when daylight saving time is in effect. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -9 Range_Domain_Maximum: -3 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: no Enumerated_Domain_Value_Definition: Daylight saving time is not observed. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Attribute: Attribute_Label: Symbol Attribute_Definition: A code used to determine polygon symbolization for map display. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AL Enumerated_Domain_Value_Definition: Alaska time zone. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: AT Enumerated_Domain_Value_Definition: Atlantic time zone. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: CE Enumerated_Domain_Value_Definition: Central time zone. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: EA Enumerated_Domain_Value_Definition: Eastern time zone. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: EAno Enumerated_Domain_Value_Definition: Eastern time zone; daylight saving time not observed. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: HA Enumerated_Domain_Value_Definition: Hawaii-Aleutian time zone. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: HAno Enumerated_Domain_Value_Definition: Hawaii-Aleutian time zone; daylight saving time not observed. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: MO Enumerated_Domain_Value_Definition: Mountain time zone. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: MOno Enumerated_Domain_Value_Definition: Mountain time zone; daylight saving time not observed. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: PA Enumerated_Domain_Value_Definition: Pacific time zone. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Earth Science Information Center, U.S. Geological Survey Contact_Address: Address_Type: Mailing address Address: 507 National Center City: Reston State_or_Province: VA Postal_Code: 20192 Contact_Voice_Telephone: 1-888-ASK-USGS (1-888-275-8747) Contact_Voice_Telephone: 703-648-5920 Contact_Instructions: In addition to the address above there are other ESIC offices throughout the country. A full list of these offices is at . Distribution_Liability: Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made by the U.S. Geological Survey regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. No responsibility is assumed by the U.S. Geological Survey in the use of these data. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ESRI Shapefile Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Digital_Form: Digital_Transfer_Information: Format_Name: SDTS Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Fees: There is no charge for the map layer. Metadata_Reference_Information: Metadata_Date: 20050616 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peg Rawson Contact_Organization: National Atlas of the United States Contact_Address: Address_Type: Mailing address Address: 12201 Sunrise Valley Drive Address: MS-561 City: Reston State_or_Province: VA Postal_Code: 20192 Contact_Voice_Telephone: 703-648-4183 Contact_Electronic_Mail_Address: atlasmail@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Security_Information: Metadata_Security_Classification_System: None Metadata_Security_Classification: Unclassified Metadata_Security_Handling_Description: None