SFGIS US Census 2000 Blocks (No Water)

Metadata also available as

Frequently-anticipated questions:


What does this data set describe?

Title: SFGIS US Census 2000 Blocks (No Water)
Abstract:
US Census 2000 Block Geography modified to conform with SFGIS Library Geography (Streets, Lakes, et al.). Water areas have been clipped from this layer.
  1. How should this data set be cited?

    Department of Telecommunications and Information Services, and Bureau, US Census , August 2003, SFGIS US Census 2000 Blocks (No Water).

    Online Links:

    • Server=tisent20; Service=5151; User=sfgis; Version=SDE.DEFAULT

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -123.110826
    East_Bounding_Coordinate: -122.325830
    North_Bounding_Coordinate: 37.864866
    South_Bounding_Coordinate: 37.690870

  3. What does it look like?

    <http://www.census.gov>
    US Census web site.

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

    Calendar_Date: 1904
    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 (5792)

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

      The map projection used is Lambert Conformal Conic.

      Projection parameters:
      Standard_Parallel: 37.066667
      Standard_Parallel: 38.433333
      Longitude_of_Central_Meridian: -120.500000
      Latitude_of_Projection_Origin: 36.500000
      False_Easting: 6561666.666667
      False_Northing: 1640416.666667

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000512
      Ordinates (y-coordinates) are specified to the nearest 0.000512
      Planar coordinates are specified in survey feet

      The horizontal datum used is North American Datum of 1983.
      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.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Resolution: 1.000000
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    SDE.SFGIS.CENSUS2000_BLK_NOWATER

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    FIPSSTCO

    TRACT2000

    BLOCK2000

    STFID

    STATE

    COUNTY

    TRACT

    BLOCK

    POP2000

    WHITE

    BLACK

    AMERI_ES

    ASIAN

    HAWN_PI

    OTHER

    MULT_RACE

    HISPANIC

    MALES

    FEMALES

    AGE_UNDER5

    AGE_5_17

    AGE_18_21

    AGE_22_29

    AGE_30_39

    AGE_40_49

    AGE_50_64

    AGE_65_UP

    MED_AGE

    MED_AGE_M

    MED_AGE_F

    HOUSEHOLDS

    AVE_HH_SZ

    HSEHLD_1_M

    HSEHLD_1_F

    MARHH_CHD

    MARHH_NO_C

    MHH_CHILD

    FHH_CHILD

    FAMILIES

    AVE_FAM_SZ

    HSE_UNITS

    URBAN

    RURAL

    VACANT

    OWNER_OCC

    RENTER_OCC

    SHAPE
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    SHAPE..Area()

    SHAPE..Length()


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?

    US Census Bureau; SFGIS.

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

    Department of Telecommunications and Information Services
    875 Stevenson St
    San Francisco, CA 94103
    USA

    415-554-0800 (voice)
    415-554-0886 (FAX)
    gis@sfgov.org


Why was the data set created?

Built to allow meaningful analysis by allowing accurate overlay with other SFGIS Library layers.


How was the data set created?

  1. From what previous works were the data drawn?

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

    (process 1 of 1)
    Downloaded from US Census Bureau. Edited to conform with City Basemap, and remove water areas.

  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?

  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?


How can someone get a copy of the data set?

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

Access_Constraints: See standard SFGIS access language
Use_Constraints: See standard SFGIS use language.

  1. Who distributes the data set?[Distributor contact information not provided.]

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

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 23-Mar-2005
Metadata author:
Department of Telecommunications and Information Services
875 Stevenson St
San Francisco, CA 94103
USA

415-554-0800 (voice)
415-554-0886 (FAX)
gis@sfgov.org

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Generated by mp version 2.8.6 on Wed May 03 10:12:54 2006