Identification_Information:
  Citation:
    Citation_Information:
      Originator: Weston Solutions
      Publication_Date: 20060104
      Title: Draft reference grid cells for emergency response reconnaissance developed for use by the US Environmental Protection Agency (quads6k_us20070104)
      Edition: Draft
      Geospatial_Data_Presentation_Form: vector digital data
      Online_Linkage: To be determined
      Online_Linkage: https://epaqpx.rtp.epa.gov/QuickPlace/neworleansimtgis/Main.nsf/h_57B5B19F7A4429B1852570CE0070D546/FC2D87866C6C4284852571C6007AEFF5/?OpenDocument
  Description:
    Abstract: Draft reference grid cells for emergency response reconnaissance developed for use by the US Environmental Protection Agency.  Grid cells are based on densification of the USGS Quarterquad (1:12,000 scale or 12K) grids for the continental United States, Alaska, Hawaii and Puerto Rico and are roughly equivalent to 1:6000 scalle (6K) quadrangles approximately 2 miles long on each side.
    Purpose: To provide a base reference grid system for the entire United States as a pre-staged resource for tracking and planning emergency response activities such as reconnaisance of debris after natural disasters, oil spill cleanups and planning of monitoring activities.
    Supplemental_Information:
      Developed by Weston Solutions for the United States Environmental Protection Agency.  

      During an EPA response, 6K quad layer should be related to a look-up table (see example table in MS Access file included in the download file) tblMASTER_STATE_GRID_LU_4SDE100406) to update and map response status efforts.  The Lookup table to be used in ArcSDE to relate many 6k quad grid cells to different geographies (State and County).  24k grids for Alaska and non-CONUS areas also included because their shapes boundaries do not exactly match with child 6k cells.  Data elements of the lookup table:

      REC_NUM	Number	unique id - comes from unique record number created in parent grid layers. Initially named as 6k_ref, then Ref_6k
      Ref_ID	Text	Created by concatenating [STATE]-[Rec_Num].  Initially was named as Ref_6ks
      STATE	Text	State Name - there can be multiple records with same rec_num but different state name
      STATUS	Text	Current Grid Cell Status field. Default value is 'NA'.  Other possible values are 'Open', 'Closed' and 'Active'
      LOCKSTATUS	Text	Indicates a locked value for record.  Possible valuesare 'NA'(default), 'Open', 'Closed' and 'Active'
      LOCK_CMNT	Text	When LocakStatus field value is not NA then, a comment in this field indicates who implemented lockstatus, and why.
      QQQUAD_REF	Number	Value from Rec_num field of '24ksubquadbound.shp'  or orginal SubQuad layer which was created only for gulf coast hurricane prone areas.
      QQQUADREFT	Text	Ref_ID value from '24ksubquadbound.shp'
      CONUS	Yes/No	identifies grid cells which will be part of final 6k quad layer but Continental US areas only
      SEL_12K	Yes/No	Identifies all cells that intersect with 12k layer. Initially named as 12k_sel
  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 200608
    Currentness_Reference: publication date
  Status:
    Progress: In work
    Maintenance_and_Update_Frequency: As needed
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -177.281250
      East_Bounding_Coordinate: 163.250000
      North_Bounding_Coordinate: 71.406250
      South_Bounding_Coordinate: -14.437500
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: environment
      Theme_Keyword: 007
    Theme:
      Theme_Keyword_Thesaurus: EPA Geospatial Keyword Thesaurus
      Theme_Keyword: Response
      Theme_Keyword: Spills
      Theme_Keyword: Disaster
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: emergency response
      Theme_Keyword: homeland security
      Theme_Keyword: reference grid
    Place:
      Place_Keyword_Thesaurus: None
      Place_Keyword: United States
      Place_Keyword: U.S.
      Place_Keyword: Continental United States and associated territories
      Place_Keyword: ALABAMA
      Place_Keyword: AL
      Place_Keyword: ALASKA
      Place_Keyword: AK
      Place_Keyword: AMERICAN SAMOA
      Place_Keyword: AS
      Place_Keyword: ARIZONA
      Place_Keyword: AZ
      Place_Keyword: ARKANSAS
      Place_Keyword: AR
      Place_Keyword: CALIFORNIA
      Place_Keyword: CA
      Place_Keyword: COLORADO
      Place_Keyword: CO
      Place_Keyword: CONNECTICUT
      Place_Keyword: CT
      Place_Keyword: DELAWARE
      Place_Keyword: DE
      Place_Keyword: DISTRICT OF COLUMBIA
      Place_Keyword: DC
      Place_Keyword: FEDERATED STATES OF MICRONESIA
      Place_Keyword: FM
      Place_Keyword: FLORIDA
      Place_Keyword: FL
      Place_Keyword: GEORGIA
      Place_Keyword: GA
      Place_Keyword: GUAM
      Place_Keyword: GU
      Place_Keyword: HAWAII
      Place_Keyword: HI
      Place_Keyword: IDAHO
      Place_Keyword: ID
      Place_Keyword: ILLINOIS
      Place_Keyword: IL
      Place_Keyword: INDIANA
      Place_Keyword: IN
      Place_Keyword: IOWA
      Place_Keyword: IA
      Place_Keyword: KANSAS
      Place_Keyword: KS
      Place_Keyword: KENTUCKY
      Place_Keyword: KY
      Place_Keyword: LOUISIANA
      Place_Keyword: LA
      Place_Keyword: MAINE
      Place_Keyword: ME
      Place_Keyword: MARSHALL ISLANDS
      Place_Keyword: MH
      Place_Keyword: MARYLAND
      Place_Keyword: MD
      Place_Keyword: MASSACHUSETTS
      Place_Keyword: MA
      Place_Keyword: MICHIGAN
      Place_Keyword: MI
      Place_Keyword: MINNESOTA
      Place_Keyword: MN
      Place_Keyword: MISSISSIPPI
      Place_Keyword: MS
      Place_Keyword: MISSOURI
      Place_Keyword: MO
      Place_Keyword: MONTANA
      Place_Keyword: MT
      Place_Keyword: NEBRASKA
      Place_Keyword: NE
      Place_Keyword: NEVADA
      Place_Keyword: NV
      Place_Keyword: NEW HAMPSHIRE
      Place_Keyword: NH
      Place_Keyword: NEW JERSEY
      Place_Keyword: NJ
      Place_Keyword: NEW MEXICO
      Place_Keyword: NM
      Place_Keyword: NEW YORK
      Place_Keyword: NY
      Place_Keyword: NORTH CAROLINA
      Place_Keyword: NC
      Place_Keyword: NORTH DAKOTA
      Place_Keyword: ND
      Place_Keyword: NORTHERN MARIANA ISLANDS
      Place_Keyword: MP
      Place_Keyword: OHIO
      Place_Keyword: OH
      Place_Keyword: OKLAHOMA
      Place_Keyword: OK
      Place_Keyword: OREGON
      Place_Keyword: OR
      Place_Keyword: PALAU
      Place_Keyword: PW
      Place_Keyword: PENNSYLVANIA
      Place_Keyword: PA
      Place_Keyword: PUERTO RICO
      Place_Keyword: PR
      Place_Keyword: RHODE ISLAND
      Place_Keyword: RI
      Place_Keyword: SOUTH CAROLINA
      Place_Keyword: SC
      Place_Keyword: SOUTH DAKOTA
      Place_Keyword: SD
      Place_Keyword: TENNESSEE
      Place_Keyword: TN
      Place_Keyword: TEXAS
      Place_Keyword: TX
      Place_Keyword: UTAH
      Place_Keyword: UT
      Place_Keyword: VERMONT
      Place_Keyword: VT
      Place_Keyword: VIRGIN ISLANDS
      Place_Keyword: VI
      Place_Keyword: VIRGINIA
      Place_Keyword: VA
      Place_Keyword: WASHINGTON
      Place_Keyword: WA
      Place_Keyword: WEST VIRGINIA
      Place_Keyword: WV
      Place_Keyword: WISCONSIN
      Place_Keyword: WI
      Place_Keyword: WYOMING
      Place_Keyword: WY
  Access_Constraints: Draft version for internal use only.  Final version will have no access restraint and will be acitvely shared with other organizations involved in responses.
  Use_Constraints: Unlimited use within EPA, limited use by other agencies while in draft form..  Final version will have no use constraints.
  Point_of_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Weston Solutions, Inc. - Dallas Office
        Contact_Person: Raj Dutt
      Contact_Position: Technical/systems Specialist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 14160 Dallas Parkway - Suite 850
        City: Dallas
        State_or_Province: TX
        Postal_Code: 75254
        Country: US
      Contact_Voice_Telephone: (469)-374-7730
      Contact_Facsimile_Telephone: (469)-374-7740
      Contact_Electronic_Mail_Address: raj.dutt@westonsolutions.com
      Contact_Instructions: Email contact preferred.
  Security_Information:
    Security_Classification_System: FIPS Pub 199
    Security_Classification: Medium Confidentiality
    Security_Handling_Description: Draft data set for internal and EPA partner review.  Final data set will probably have no security restrictions and be publicly distributed.
  Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.1.1332
Data_Quality_Information:
  Lineage:
    Process_Step:
      Process_Description:
        quads6k_us.shp layer is extracted from a base layer 'vectorgrid.shp'.  Vectorgrid layer extents are as follows:

        MinX: -179
        MaxX: -64

        MinY: 17
        MaxY: 72

        These extents cover all CONUS, Alaska, Hawaii, and Puerto Rico.

        Total number of records in vectorgrid.shp is approx. 6.5 million.

        Grid Cell Height - .03125 degrees
        Grid Cell width - .03125 degrees

        quads6k_us.shp:

        This layer is slightly different from 12k or 24k quad layers.  It is created strictly as 1/4th scale of a 24k quad grid, which is 1/4th of 7.5 Degrees X 7.5
        Degrees i.e. 0.03125 degrees X 0.03125 degrees.

        Actual Quad map differ from strictly square grid shape, in some areas outside of CONUS.

        Field Definitions for 6k Quad Layer:

        Label (Text) - Label value (Unique).

        Sel_12k (T/F):  Identifies all cells that intersect with 12k layer. Initially named as 12k_sel

        QQQuad_ref (Number): Value from Rec_num field of '24ksubquadbound.shp'  or orginal SubQuad layer which was created only for gulf coast hurricane prone areas.

        QQQuadRefT (Text): Ref_ID value from '24ksubquadbound.shp'

        Final_sel (T/F): identifies grid cells which will be part of final 6k quad layer.

        Conus (T/F):  identifies grid cells which will be part of final 6k quad layer but Continental US areas only

        Rec_num (Number): Unique id for each 6k tile. Initially named as 6k_ref, then Ref_6k

        Link table tblMASTER_STATE_GRID_LU_4SDE - this is a lookup table for identifying all 6k grid tiles that belong to each single state.  This table has many duplicate records with same value for ref_num.  However ref_id value is unique.

        State: State that each tile belongs to.  This field is found in link table

        Ref_ID (string): a concatenated string id [State]-[Ref_6k].  Initially named as Ref_6ks
      Process_Date: 200608
      Process_Contact:
        Contact_Information:
          Contact_Organization_Primary:
            Contact_Organization: Weston Solutions
            Contact_Person: Raj Dutt
          Contact_Position: Technical/systems Specialist
          Contact_Address:
            Address_Type: mailing and physical address
            Address: 14160 Dallas Parkway - Suite 850
            City: Dallas
            State_or_Province: TX
            Postal_Code: 75254
            Country: US
          Contact_Voice_Telephone: (469)-374-7730
          Contact_Facsimile_Telephone: (469)-374-7740
          Contact_Electronic_Mail_Address: raj.dutt@westonsolutions.com
          Hours_of_Service: -
          Contact_Instructions: Email preferred.
    Process_Step:
      Process_Description: Metadata imported.
      Source_Used_Citation_Abbreviation: c:\temp\xml6C.tmp
    Process_Step:
      Process_Description: Dataset copied.
      Source_Used_Citation_Abbreviation: G:\data\6K quad\quads6k_us20061005
    Process_Step:
      Process_Description: Assigned state abbreviation codes for grid cells whose centers that fell in coastal waters, large inland waters and for U.S. commonwealths, territories and associated areas such as Puerto Rico, US Virgin Islands and pacific islands and territories.
      Process_Date: 20060102
      Process_Contact:
        Contact_Information:
          Contact_Organization_Primary:
            Contact_Organization: EPA/R2/GIS Team
            Contact_Person: Harvey Simon
          Contact_Position: GIS Coordinator
          Contact_Voice_Telephone: 212-637-3570
          Contact_Facsimile_Telephone: 212-637-5045
          Contact_Electronic_Mail_Address: simon.harvey@epa.gov
          Hours_of_Service: 9-5 EST, M-F
          Contact_Instructions: email preferred.
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: 1270281
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Geographic:
      Latitude_Resolution: 0.000000
      Longitude_Resolution: 0.000000
      Geographic_Coordinate_Units: Decimal degrees
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1983
      Ellipsoid_Name: Geodetic Reference System 80
      Semi-major_Axis: 6378137.000000
      Denominator_of_Flattening_Ratio: 298.257222
  Vertical_Coordinate_System_Definition:
    Altitude_System_Definition:
      Altitude_Resolution: 0.000010
      Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
  Overview_Description:
    Entity_and_Attribute_Overview: Fields include unique identifiers and labeling information for use in linking to EPA response data and for referring to other spatial identifiers such as USGS Quarterquad identification, State, Zip Code and others.
    Entity_and_Attribute_Detail_Citation:
      Field Definitions for 6k Quad Layer:

      Field Name	Type	Length	Description
      QQQUAD_REF	Number	16	Value from Rec_num field of '24ksubquadbound.shp'  or orginal SubQuad layer which was created only for gulf coast hurricane prone areas.
      QQQUADREFT	Text	16	Ref_ID value from '24ksubquadbound.shp'
      FINAL_SEL	Yes/No	1	Identifies grid cells which will be part of final 6k quad layer.
      CONUS	                      Yes/No	1	identifies grid cells which will be part of final 6k quad layer but Continental US areas only
      REF_6K	                      Number	16	Original unique id field.  Identical to final unique id field, REC_NUM
      SEL_12K            	Yes/No	1	Identifies all cells that intersect with 12k (3.5 minute) quad layer. Initially named as 12k_sel
      REC_NUM	Number	16	unique id - comes from unique record number created in parent grid layers. Initially named as 6k_ref, then Ref_6k
      Q24K_NAME	Text	100	Name of parent 24k polygon - If available and if exists
      Q24K_ID	                     Text	100	ID of parent 24k polygon -If available and if exists
      Q12K_ID	                     Text	100	ID of parent 12k polygon - If available and if exists
      Q12K_NAME	Text	100	Name of parent 12k polygon - If available and if exists
      SRCTHMNAME	Text	100	name of parent GRID data shapefile.  Current layer includes data from three shapefiles - Quads6k_us20060911.shp, Pacific_grid1sel.shp, and Pacific_grid2sel.shp
      NATGRID	Text	254	US National Grid Coordinate of grid cell centerpoint
      LONG         	Number	16	Longitude in Decimal Degrees of center point of Gird Cell
      LONG_POS	Number	16	Absolute value of longitude center point
      CTR_ZIP    	Text	10	Zip code of center point of grid cell
      CTR_ST    	Text	16	State abbreviation code for US State, commonwealth or territory either at center of grid cell or within related water features.
Distribution_Information:
  Resource_Description: Downloadable Data
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Transfer_Size: 71.564
Metadata_Reference_Information:
  Metadata_Date: 20070104
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: EPA Region 2
        Contact_Person: Harvey Simon
      Contact_Position: GIS Coordinator
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 290 Broadway
        City: New York
        State_or_Province: NY
        Postal_Code: 10007
      Contact_Voice_Telephone: 212-637-3594
      Contact_Facsimile_Telephone: 212-637-5045
      Contact_Electronic_Mail_Address: r2gisdata@epa.gov
      Hours_of_Service: 9-5 EST, M-F
      Contact_Instructions: Email contact preferred.
  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
  Metadata_Time_Convention: local time
