U.S. USGS 1:24,000 Topographic Quadrangle Series Indexes

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Frequently-anticipated questions:


What does this data set describe?

    Title: U.S. USGS 1:24,000 Topographic Quadrangle Series Indexes
    Abstract:
    U.S. USGS 1:24,000 Topographic Quadrangle Series Indexes represents the geographic extent of USGS 1:24,000 topographic maps (7.5- by 7.5-minute quadrangles) for the coterminous U.S. forty-eight states and District of Columbia.

  1. How should this data set be cited?

    Environmental Systems Research , Inc. (ESRI), 20020401, U.S. USGS 1:24,000 Topographic Quadrangle Series Indexes: ESRI Data & Maps 2002, Environmental Systems Research Institute, Inc. (ESRI), Redlands, California, USA.

    Online Links:

    • Server=rainbow.sunsite.utk.edu; Service=5151; User=gisdata; Version=SDE.DEFAULT

    Other_Citation_Details: Location: ESRI Data & Maps 2002 (CD 2) \usa

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -124.750008
    East_Bounding_Coordinate: -66.875000
    North_Bounding_Coordinate: 49.499996
    South_Bounding_Coordinate: 24.500000

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: 01-Oct-1992
    Currentness_Reference: publication date

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • G-polygon (53911)

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is This data set was mathematically generated. You can define or use it unchanged with data based on any datum..
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.

  7. How does the data set describe geographic features?

    topoq24
    The polygons represent a systematic grid of 7.5- by 7.5-minute quadrangles based on a latitude-longitude graticule for the coterminous U.S. forty-eight states and District of Columbia. Each 7.5- by 7.5-minute quadrangle is 1/32 the area of a USGS 1:100,000 topographic quadrangle and 1/128 of a USGS 1:250,000 topographic quadrangle. (Source: United States Geological Survey)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    USGS_QD_ID
    The quadrangle identification number. The first two digits represent the latitude in degrees north, the next three digits represent the longitude in degrees west, and a hyphen, and the last two characters reveal the grid cell code within each one-degree rectangle. To understand the grid cell code within the one-degree rectangle, imagine a rectangle the shape of a door. Divide the "door" into eight rows (A-H) and columns (1-8), the lower right corner grid cell code is "A1" and the upper left corner grid cell code is "H8". Each grid cell represents a USGS 1:24,000 topographic quadrangle, hence sixty-four per one-degree rectangle. Each USGS 1:100,000 topographic quadrangle is one-half by one degree with only two fitting within the one-degree rectangle-the upper half and the lower half of the "door". The lower quadrangle's grid cell code is "A1" and the upper quadrangle's grid cell code is "E1" (these are the only grid cell codes for USGS 1:100,000 topographic quadrangles). Each USGS 1:250,000 topographic quadrangle is one by two degrees, which, is two "doors" side by side. The quadrangle's grid cell code is "A1" (this is the only grid cell code for USGS 1:250,000 topographic quadrangles). (Source: United States Geological Survey as interpreted and described by ESRI)

    Formal codeset
    Codeset Name:USGS Topographic Names Database, Published Map Sheet Data File (T-70)
    Codeset Source:United States Geological Survey

    QUAD_NAME
    The quadrangle name. The names of theoretical quadrangles indicate the quadrangle's relationship to the published map on which the land area appears (e.g. "Crescent City OE W"). The word "(digital)" in a quadrangle name also indicates that the quadrangle is theoretical. It is usually for quadrangles that show islands that are distant from the map sheets on which they are inserted. (Source: United States Geological Survey)

    Names for the features.

    MAP_EDIT
    The type of map for the quadrangle. If several types of maps exist for the same quadrangle, the lowest code value is listed. (Source: United States Geological Survey)

    ValueDefinition
    1Topographic contour.
    3Planimetric.
    4Orthophoto map with contours.
    5unknown
    6Shaded relief.
    7unknown
    9Slope.
    GSurface management status (Bureau of Land Management).
    HSurface minerals (Bureau of Land Management).
    KTopographyñbathymetry, line map.
    LTopographyñbathymetry, orthophoto map.

    ST_NAME1
    The name of the state in which the quadrangle is located. The state names are always stored beginning with ST_NAME1, but they are not listed in any particular order. (Source: United States Geological Survey)

    Formal codeset
    Codeset Name:Federal Information Processing Standards
    Codeset Source:National Institute of Standards and Technology

    ST_NAME2
    The name of the second state in which the quadrangle is located. The state names are always stored beginning with ST_NAME1, but they are not listed in any particular order. If a quadrangle covers fewer than four states, this attribute may be blank. (Source: United States Geological Survey)

    Formal codeset
    Codeset Name:Federal Information Processing Standards
    Codeset Source:National Institute of Standards and Technology

    ST_NAME3
    The name of the third state in which the quadrangle is located. The state names are always stored beginning with ST_NAME1, but they are not listed in any particular order. If a quadrangle covers fewer than four states, this attribute may be blank. (Source: United States Geological Survey)

    Formal codeset
    Codeset Name:Federal Information Processing Standards
    Codeset Source:National Institute of Standards and Technology

    ST_NAME4
    The name of the fourth state in which the quadrangle is located. The state names are always stored beginning with ST_NAME1, but they are not listed in any particular order. If a quadrangle covers fewer than four states, this attribute may be blank. (Source: United States Geological Survey)

    Formal codeset
    Codeset Name:Federal Information Processing Standards
    Codeset Source:National Institute of Standards and Technology

    DATE_REV
    The most recent date of revision for the quadrangle, expressed as the last two digits of the year in the twentieth century. This information is not available for some quadrangles. (Source: United States Geological Survey)

    Dates for the features.

    DATE_PUB
    The most recent date of publication for the quadrangle, expressed as the last two digits of the year in the twentieth century. This information is not available for some quadrangles. (Source: United States Geological Survey)

    Dates for the features.

    PHOTO_R_DT
    The most recent date of photo revision, if applicable, for the quadrangle, expressed as the last two digits of the year (sometimes preceded by the two-digit month) in the twentieth century. This information is not available for some quadrangles. (Source: United States Geological Survey)

    Dates for the features.


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    United States Geological Survey

  3. To whom should users address questions about the data?

    Environmental Systems Research Institute, Inc. (ESRI)
    c/o Data Team
    380 New York Street
    Redlands, California 92373-8100
    USA

    909-793-2853 (voice)
    909-793-5953 (FAX)
    info@esri.com

    Hours_of_Service: 8:00 a.m.ñ5:30 p.m. Pacific time, MondayñFriday
    Contact_Instructions:
    In the United Statesñ Please direct all inquiries regarding software/data pricing and consulting services to your local ESRI Regional Office. For support, you may contact Technical Support by telephone (voice) between 6:00 a.m. and 6:00 p.m. Pacific time, Monday through Friday, by dialing 909-793-3774; facsimile (fax) available at 909-792-0960; electronic mail (e-mail) support@esri.com; or visit <http://support.esri.com>; ESRI holidays excluded.

    Outside the United Statesñ Please direct all inquiries regarding software/data pricing, sales, support, and consulting services to your local ESRI International Distributor. This information can be found at <http://gis.esri.com/intldist/contactint.cfm>.

    For other questions or comments, you may contact ESRI headquarters by e-mail, telephone, or fax or write to us.


Why was the data set created?

U.S. USGS 1:24,000 Topographic Quadrangle Series Indexes provides quadrangle name, identification number, publication data, and map coverage by state for each quadrangle. This large-scale index grid is appropriate for display at more detailed scales.


How was the data set created?

  1. From what previous works were the data drawn?

    ArcUSA 1:2M (source 1 of 1)
    Environmental Systems Research , Inc. (ESRI), 19921001, ArcUSA 1:2M:, Environmental Systems Research Institute, Inc. (ESRI), Redlands, California, USA.

    Other_Citation_Details:
    USGS Topographic Quadrangles dates of publication 1905 through 1987.
    Type_of_Source_Media: CDñROM
    Source_Scale_Denominator: 2000000
    Source_Contribution: Attribute and geospatial data

  2. How were the data generated, processed, and modified?

    Date: 1992 (process 1 of 4)
    This data set was generated from several sources: the geospatial part of this data set was mathematically generated using the ARC/INFO GRID extension. The USGS Topographic Names Database and the Published Map Sheet Data File (T-70) were the two primary digital sources for the attributes. Where these databases were incomplete, various published USGS map indexes were consulted to update the attributes.

    Data sources produced in this process:

    • ArcUSA 1:2M

    Date: 24-Aug-2000 (process 2 of 4)
    The following steps were performed by ESRI: Extracted data set from ArcUSA 1:2M. Removed unneeded attributes. Generalized to a tolerance of 4.0 miles. Created ArcGISô layer file (.lyr). Created ArcView legend file (.avl). Ran ArcView Avenue request ExportClean, and created spatial indices.

    Data sources used in this process:

    • ArcUSA 1:2M

    (process 3 of 4)
    Dataset copied.

    Data sources used in this process:

    (process 4 of 4)
    Dataset copied.

    Data sources used in this process:

  3. What similar or related data should the user be aware of?


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

  2. How accurate are the geographic locations?

    The geospatial part of this data set was mathematically generated using the ARC/INFO GRIDô extension. In this manner, the locations of the quadrangles were computed. The positional accuracy for these quadrangles is limited only by the resolution of the data set which is 51 meters.

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    After processing, the data set is checked for drawing display and number of records and file sizes compared with source materials.

  5. How consistent are the relationships among the observations, including topology?

    No duplicate features are present. The shapefile is exported using Avenue request ExportClean. This request verifies and enforces the correctness of shapes. Occasionally, USGS actual quadrangles depart from a completely rectangular format mainly because of map sheet production considerations in coastal areas and offshore islands that result in offset, over edge, and insert sheet layouts. These are not represented precisely by the data set, but the correct attribute information is included.


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: Access granted to Licensee only.
Use_Constraints:
The data are provided by multiple, third party data vendors under license to ESRI for inclusion on ESRI Data & Maps CDñROMs for use with ESRI® software. Each data vendor has its own data licensing policies and may grant varying redistribution rights to end users. Please consult the redistribution rights below for this data set provided on ESRI Data & Maps CDñROMs. As used herein, ìGeodataî shall mean any digital data set consisting of geographic data coordinates and associated attributes.

The redistribution rights for this data set: Redistribution rights are granted by the data vendor for hard-copy renditions or static, electronic map images (e.g. .gif, .jpeg, etc.) that are plotted, printed, or publicly displayed with proper metadata and source/copyright attribution to the respective data vendor(s). Geodata is redistributable with a Value-Added Software Application developed by ESRI Business Partners on a royalty-free basis with proper metadata and source/copyright attribution to the respective data vendor(s). Geodata is redistributable without a Value-Added Software Application (i.e., adding the sample data to an existing, [non]commercial data set for redistribution) with proper metadata and source/copyright attribution to the respective data vendor(s).

The terms and conditions below apply to all the data sets provided on the ESRI Data & Maps CDñROMs.

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THE DATA AND RELATED MATERIALS ARE EXCLUDED FROM THE LIMITED WARRANTY, AND THE LICENSEE EXPRESSLY ACKNOWLEDGES THAT THE DATA CONTAINS SOME NONCONFORMITIES, DEFECTS, OR ERRORS. ESRI DOES NOT WARRANT THAT THE DATA WILL MEET LICENSEE'S NEEDS OR EXPECTATIONS; THAT THE USE OF THE DATA WILL BE UNINTERRUPTED; OR THAT ALL NONCONFORMITIES, DEFECTS, OR ERRORS CAN OR WILL BE CORRECTED. ESRI IS NOT INVITING RELIANCE ON THIS DATA, AND THE LICENSEE SHOULD ALWAYS VERIFY ACTUAL DATA.

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  1. Who distributes the data set? (Distributor 1 of 1)

    Environmental Systems Research Institute, Inc. (ESRI); ESRI International Distributors
    380 New York Street
    Redlands, California 92373-8100
    USA

    800-447-9778 (voice)

    Contact_Instructions:
    In the United States, contact the ESRI Telesales staff at 800-447-9778 for more information about our software and data.

    Outside the United States, please direct all inquiries to your local ESRI International Distributor. This information can be found at <http://gis.esri.com/intldist/contactint.cfm>.

  2. What's the catalog number I need to order this data set?

    Offline Data

  3. What legal disclaimers am I supposed to read?

    See use constraints.

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    To use this data requires software that supports ArcView® GIS shapefiles.


Who wrote the metadata?

Dates:
Last modified: 18-Jul-2003

Metadata author:
Environmental Systems Research Institute, Inc. (ESRI)
c/o Data Team
380 New York Street
Redlands, California 92373-8100
USA

909-793-2853 (voice)
909-793-5953 (FAX)
info@esri.com

Hours_of_Service: 8:00 a.m.ñ5:30 p.m. Pacific time, MondayñFriday
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

Metadata extensions used:


Generated by mp version 2.7.33 on Sat Apr 17 21:07:02 2004