S.F. Bay Vulnerable Waste Water Treatment Plants

Frequently-anticipated questions:


What does this data set describe?

Title: S.F. Bay Vulnerable Waste Water Treatment Plants
Abstract:
This dataset shows the wastewater treatment plants (WWTP's) in the San Francisco Bay that are vulnerable to a 100-year coastal flood with a 1.4 meter sea level rise.
Supplemental_Information:
"Vulnerable" WWTP's are those where the flooding extent inundates more than 10 percent of the WWTP polygon.
  1. How should this data set be cited?

    Heberger, Matthew, and Herrera, Pablo, 2009, S.F. Bay Vulnerable Waste Water Treatment Plants: The Impacts of Sea-Level Rise on the California Coast, Pacific Institute, Oakland CA.

    Online Links:

    This is part of the following larger work.

    Heberger, Matthew, Cooley, Heather, Gleick, Peter, and Herrera, Pablo, 2009, The Impacts of Sea-Level Rise on the California Coast: Pacific Institute, Oakland CA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -124.195023
    East_Bounding_Coordinate: -117.957500
    North_Bounding_Coordinate: 40.766892
    South_Bounding_Coordinate: 33.638333

  3. What does it look like?

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

    Calendar_Date: 2008
    Currentness_Reference: Data reference

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

    Geospatial_Data_Presentation_Form: vector digital data (point)

  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):

      • Entity point (28)

    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 0.000000. Longitudes are given to the nearest 0.000000. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257224.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Datum_Name: North American Vertical Datum of 1988
      Altitude_Distance_Units: meters
      Altitude_Encoding_Method: Attribute values

  7. How does the data set describe geographic features?

    Vulnerable_WWTP

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    NPDES

    CITY

    COUNTY

    FAC_STATE

    REC_WATER

    NAME

    ADDRESS

    ZIP

    FLOW
    Flow rate in Million Gallons per Day (MGD)


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?

    Point data for WWTP's were downloaded from the EPA's PCS (Permit Compliance System) database at: <http://www.epa.gov/waterscience/ftp/basins/gis_data/>

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

    Pacific Institute
    c/o Matthew Heberger
    Research Associate/GIS Manager
    654 13th Street
    Oakland, CA 94612
    USA

    (510) 251-1600 (voice)
    (510) 251-2203 (FAX)
    mheberger@pacinst.org

    Hours_of_Service: 9:00 AM to 5:00 PM


Why was the data set created?

Identify WWTP's vulnerable to a 100-year coastal flood with a 1.4 meter sea-level rise and assess the risks associated.


How was the data set created?

  1. From what previous works were the data drawn?

    (source 1 of 1)
    Institute, Pacific, WWTP_point.shp.

    Online Links:

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

    (process 1 of 1)
    The WWTP polygon shapefile was intersected with the year 2100 flooding extent. All WWTP's which were flooded over at least 10% of the footprint were considered "vulnerable."

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

    .

    This is part of the following larger work.

    ,.


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

  1. How well have the observations been checked?

    The attributes were derived directly from the EPA PCS database. <http://www.epa.gov/waterscience/ftp/basins/gis_data/>
    In the case where treatment plants were located, but did not exist in the database, the footprint was simply outlined with no attributes.

  2. How accurate are the geographic locations?

    The locations of the WWTP's were checked against the NAIP imagery from 2005 as well as compared to Google Earth which has higher resolution imagery. The footprints of the WWTP was then outlined at a scale of 1:10,000

  3. How accurate are the heights or depths?

    N/A

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

    Data set has been visually inspected.

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

    The dataset is topologically correct.


How can someone get a copy of the data set?

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

Access_Constraints:
None. Data are freely downloadable and available for use in GIS and mapping subject the use constraints below.
Use_Constraints:
The data are freely redistributable with proper metadata and source attribution. Please reference the Pacific Institute as the originator of the dataset in any future products or research derived from these data. This information is being made available for informational purposes only. Users of this information agree by their use to hold blameless the State of California, and its respective officers, employees, agents, contractors, and subcontractors for any liability associated with its use in any form. This work shall not be used to assess actual coastal hazards, insurance requirements, or property values and specifically shall not be used in lieu of Flood Insurance Studies and Flood Insurance Rate Maps issued by the Federal Emergency Management Agency (FEMA).

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

    Pacific Institute
    c/o Matthew Heberger
    Research Associate/GIS Manager
    654 13th Street,
    Preservation Park
    Oakland, CA 94612
    USA

    (510) 251-1600 (voice)
    (510) 251-2203 (FAX)
    mheberger@pacinst.org

    Hours_of_Service: 9:00 AM to 5:00 PM
  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    The data are freely redistributable with proper metadata and source attribution. Please reference the Pacific Institute as the originator of the dataset in any future products or research derived from these data.
    This information is being made available for informational purposes only. Users of this information agree by their use to hold blameless the State of California, and its respective officers, employees, agents, contractors, and subcontractors for any liability associated with its use in any form. This work shall not be used to assess actual coastal hazards, insurance requirements, or property values and specifically shall not be used in lieu of Flood Insurance Studies and Flood Insurance Rate Maps issued by the Federal Emergency Management Agency (FEMA).

  4. How can I download or order the data?

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

    These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing the data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com.


Who wrote the metadata?

Dates:
Last modified: 24-Feb-2009
Metadata author:
Pacific Institute
c/o Matthew Heberger
Research Associate/GIS Manager
654 13th Street,
Preservation Park
Oakland, CA 94612
USA

(510) 251-1600 (voice)
(510) 251-2203 (FAX)
mheberger@pacinst.org

Hours_of_Service: 9:00 AM to 5:00 PM
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Generated by mp version 2.9.6 on Thu Feb 26 11:55:12 2009