Endangered Species Recovery Program
Geospatial Metadata

Historical lakes of the San Joaquin Valley

Available as [Questions & Answers] - [Outline] - [Parseable text] - [SGML] - [XML] - [DIF]

Frequently-anticipated questions:


What does this data set describe?

    Title: Historical lakes of the San Joaquin Valley
    Abstract:
    A coverage showing the approximate location of Historical lakes of the San Joaquin Valley.
    Supplemental_Information:
    Based on "Historical Native Vegetation Map of the Tulare Basin, California", by Griggs, F.T., J.M. Zaninovich, and G.D. Werschkull. 1992

  1. How should this data set be cited?

    Endangered Species Recovery Program, 1999, Historical lakes of the San Joaquin Valley: Endangered Species Recovery Program, Fresno, CA, US.

    Online Links:

    Other_Citation_Details:
    U.S. FWS, 1998 Recovery Plan for Upland Species of the San Joaquin Valley, California.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -119.968
    East_Bounding_Coordinate: -118.954
    North_Bounding_Coordinate: 36.2179
    South_Bounding_Coordinate: 35.1163

  3. What does it look like?

    hist_lakes.jpg (JPEG)
    Graphic of theme hist_lakes

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

    Calendar_Date: 1998
    Currentness_Reference: ground condition

  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.

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

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 10
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -123
      Latitude_of_Projection_Origin: 0
      False_Easting: 500000
      False_Northing: 0

      Planar coordinates are encoded using Coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 10
      Ordinates (y-coordinates) are specified to the nearest 10
      Planar coordinates are specified in meters

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clark 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.

  7. How does the data set describe geographic features?

    Entity_and_Attribute_Overview:
    Two attributes are "name" and "type". "name" is the name of the feature, and "type" is the type of feature using values consistent with the U.S. Geological Survey Geographic Names Information System. See <http://mapping.usgs.gov/www/ti/GNIS/gnis_users_guide_toc.html> for more details.
    Entity_and_Attribute_Detail_Citation: ESRP, 1999


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?

    Daniel F. Williams Ellen A. Cypher Patrick A. Kelly Nancy Norvell Scott E. Phillips

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

    Endangered Species Recovery Program
    GIS Analyst


    US

    (voice)
    559 453 1227 (FAX)
    gis@esrp.org

    Contact_Instructions: Contact by electronic or postal mail


Why was the data set created?

To show Historical hydrographic features for figure 65 of the SJV Recovery Plan.


How was the data set created?

  1. Where did the data come from?

    GRIGGS (source 1 of 1)
    Griggs, F.T., J.M. Zaninovich, and G.D. Wersc, 1992, Historical native vegetation map of the Tulare Basin, California.: California Energy Commission, Sacramento, CA, US.

    Other_Citation_Details:
    Pp. 111-118 in Endangered and sensitive species of the San Joaquin Valley, California: their biology, management, and conservation (D.F. Williams, S. Byrne, and T.A. Rado, eds.) 388 pp.
    Type_of_Source_Media: paper
    Source_Contribution:
    The location of Historical water features of the Tulare Lake Basin, California.

  2. What changes have been made?

    Date: 1998 (change 1 of 1)
    Map from publication was scanned, registered to hydrographic intersections, and rectified. The scanned image was used to digitize water features from the map.

    Person responsible for change:

    Endangered Species Recovery Program
    GIS Analyst


    US

    (voice)
    559 453 1227 (FAX)
    gis@esrp.org

    Contact_Instructions: Contact by electronic or postal mail


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

  1. How well have the observations been checked?

    The attributes for "Kern River Channel" and "Goose Lake" were taken from the context of the USGS 1:250,000 Scale Bakersfield map. The remaining attribute names should be accurate according to the source map.

  2. How accurate are the geographic locations?

    The source map was an scanned 8.5 by 11 page. The control points used for registering the scanned image were very approximate locations of river intersections. The accuracy is not suitable for large scale mapping and it is not recomended for purposes other than general illustrations of the lake locations.

  3. How accurate are the heights or depths?

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

    The source map showed one continous body of water for the polygons labelled as "Kern River Channel", "Buena Vista Lake", and "Kern Lake". What appeared to be the edges of "Buena Vista Lake" were used to split this into three separate polygon features.

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

    Arcs connect to each other at nodes. Arcs have direction and left and right sides. Arcs that connect to surround an area define a polygon.


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. Acknowledgement of the Endangered Species Recovery Program would be appreciated in products derived from this data.

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

    Endangered Species Recovery Program
    GIS Analyst


    US

    (voice)
    559 453 1227 (FAX)
    gis@esrp.org

    Contact_Instructions: Contact by electronic or postal mail
  2. What's the catalog number I need to order this data set?

    Arc Export file of hist_lakes

  3. What legal disclaimers am I supposed to read?

    No warranty, expressed or implied is made by the ESRP regarding the utility of the data, nor shall the act of distribution constitute any such warranty. These data are geographic illustrations and do not represent legal boundaries.

  4. How can I download or order the data?

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

    computer with software to import ARC/INFO GIS data


Who wrote the metadata?

Dates:
Last modified: 06-Jul-1999

Metadata author:
Endangered Species Recovery Program
GIS Analyst


US

(voice)
559 453 1227 (FAX)
gis@esrp.org

Contact_Instructions: Contact by electronic or postal mail
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)


Generated by mp version 2.4.15 on Tue Jul 6 16:24:57 1999
Endangered Species Recovery Program
http://arnica.csustan.edu/esrpp