Historical lakes of the San Joaquin Valley

Frequently-anticipated 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?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. Where did the data come from?
  2. What changes have been made?
• 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 data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

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:

   • <http://arnica.csustan.edu/esrpp>

   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

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

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

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

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

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.

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?
   • Availability in digital form:

     Data format:	ARCE (version 7.2.1) no compression
     Network links:	<http://www.esrp.org/gis/>

   • Cost to order the data: Data may be accessed online without charge.

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

   computer with software to import ARC/INFO GIS data

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)