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U.S. DEPARTMENT OF THE INTERIOR

BUREAU OF LAND MANAGEMENT

Oregon / Washington

GIS Metadata


Frequently-asked questions:


What does this data set describe?

  1. How should this data set be cited?

  2. What geographic area does the data set cover?

  3. What does it look like?

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

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

  6. How does the data set represent geographic features?

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

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

  7. How does the data set describe geographic features?

    7.5-minute Quad Polygons
    Polygons at intervals of 7.5 minutes of latitude and longitude (Source: BLM)

    objectid
    Internal feature number. (Source: ESRI)
                      

    Sequential unique whole numbers that are automatically generated.

    alt_ohiocode
    The USGS Ohio code for the 24k (7.5-minute) quad, with the row/column coding listed last. (Source: BLM)
                      

    Ohio Code for the quad, with the row/column coding listed last; for example, 44117A2 (in which the 44 is the latitude, 117 the longitude of the SE corner of a one degree by one degree block; 'A" refers to the first 7.5' row and '2' refers to the second 7.5' column, as measured from the SE corner.

    name
    The name of the 24k quad. (Source: BLM)
                      

    A name up to 30 characters long. This will be the most current name given to a 24k quad, as determined by a query of the GNIS database.

    ohiocode
    The USGS Ohio code for the 24k (7.5-minute) quad, with the row/column coding listed first. (Source: BLM)
                      

    Ohio Code for the quad, with the row/column coding listed first; for example, A244117 (in which the 44 is the latitude, 117 the longitude of the southeast corner of a one degree by one degree block; 'A' refers to the first 7.5' row and '2' refers to the second 7.5' column, as measured from the southeast corner).

    old_name
    The alternative name of the 24K quad, usually the old name of a quad that has been renamed. (Source: BLM)
                      

    A name up to 30 characters long. A value will only be present if there is a known previous name or alternative name for the quad and that name can be verified with the USGS.

    q100
    The USGS Ohio code for the 100K (1 degree X .5 degree) quad. (Source: BLM)
                      

    100K Ohio code for the quad; for example, E145120 (in which the 45 is the latitude, 120 the longitude of the southeast corner of a one degree by one degree block; 'E' refers to the fifth 7.5' row and '1' refers to the first column in a 1 degree x 1 degree quad, as measured from the southeast corner). All 100K Ohio codes begin with either 'A1' or 'E1', as this is derived from the 7.5-minute quad located in the southeast corner of the 100K quad.

    shape
    Feature geometry. (Source: ESRI)
                      

    Coordinates defining the features.

    SHAPE_Length
    Length of feature in internal units. (Source: ESRI)
                      

    Positive real numbers that are automatically generated.

    SHAPE_Area
    Area of feature in internal units squared. (Source: ESRI)
                      

    Positive real numbers that are automatically generated.

    Entity and attribute overview:
    There are two attributes and descriptions, for the most part identical, of the Ohio code of a quad. The second attribute (ALT_OHIOCODE) is in the format provided by USGS. Translation to the format used in the first attribute (OHIOCODE) was required for use in many database programs (e.g. Informix, Oracle) because often, when dealing with a character field, the database program will not accept a numeral in the first space.
    
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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?

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

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Why was the data set created?

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How was the data set created?

  1. Where did the data come from?

  2. What changes have been made?

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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?

  3. How accurate are the heights or depths?

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

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

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How can someone get a copy of the data set?

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

Access constraints: None
Use constraints:
None

Distributor 1 of 1

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Who wrote the metadata?

Dates:
Last modified: 20090820

Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata(FGDC-STD-001-1998)

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