Digital Ground Model Data Sources for King County

Metadata also available as - [Outline]

Frequently anticipated questions:


What does this data set describe?

Title: Digital Ground Model Data Sources for King County
Abstract:
Digital Ground Model Data Sources for King County and surrounding Kitsap, Island, Pierce, and Snohomish Counties.
Supplemental_Information: None
  1. How should this data set be cited?

    County, King, 20170914, Digital Ground Model Data Sources for King County: King County, King County, WA.

    Online Links:

    Other_Citation_Details: None

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -122.572116
    East_Bounding_Coordinate: -121.005504
    North_Bounding_Coordinate: 47.986933
    South_Bounding_Coordinate: 47.048724

  3. What does it look like?

    <http://www5.kingcounty.gov/sdc/DataImages/dgm_source.jpg> (JPG)
    JPG File of layer overlain on base of WA counties or local cities

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

    Calendar_Date: 01-Jan-2011
    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):

      • GT-polygon composed of chains (171)

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

      The map projection used is NAD 1983 HARN StatePlane Washington North FIPS 4601 Feet.

      Projection parameters:
      Standard_Parallel: 47.5
      Standard_Parallel: 48.73333333333333
      Longitude_of_Central_Meridian: -120.8333333333333
      Latitude_of_Projection_Origin: 47.0
      False_Easting: 1640416.666666667
      False_Northing: 0.0

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.00025
      Ordinates (y-coordinates) are specified to the nearest 0.00025
      Planar coordinates are specified in foot_us

      The horizontal datum used is D North American 1983 HARN.
      The ellipsoid used is GRS 1980.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257222101.

  7. How does the data set describe geographic features?

    maint.GISC.dgm_source_area
    Polygon attribute table (Source: ESRI)

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    SHAPE
    Feature Geometry (Source: ESRI)

    Coordinates defining the features

    area_name
    Area polygon name updated. (Source: King County)

    SERIAL_ID
    Unique identifier for each source (Source: King County)

    Integer

    DATA_SOURCE
    The organization data came from acronym.

    DESCRIP
    Description of data source organization.

    TILESUFFIX
    data source code.

    ValueDefinition
    3d043di 2004
    3d093di 2009
    gsUSGS
    jbJoined NOAA Bathymetry
    jb03Joined 2003 Bathymetry
    jnJoined PSLC King County
    jsJoined USGS King County
    kcKing County 2002
    pc10Pierce County 2010
    psPuget Sound Lidar Consortium 2000 - 2002
    ps05Puget Sound Lidar Consortium 2005
    ps09Puget Sound Lidar Consortium 2009
    sc06Snohomish County 2006
    sc10Snohomish County 2010
    ws09Watershed Science 2009
    ws10Watershed Science 2010
    ws11Watershed Science 2011
    ws12Watershed Science 2012
    ws13Watershed Science 2013
    noaaNational Oceanic and Air Administration Bathmetry
    wadoeWashington Deptment of Ecology Bathymetry

    VINTAGE

    Shape.STArea()

    Shape.STLength()

    Entity_and_Attribute_Overview: None
    Entity_and_Attribute_Detail_Citation: None


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?

    King County GIS Center
    Attn: Victor High
    Senior GIS Analyst
    201 S Jackson St, Suite 706
    Seattle, WA 98104
    US

    206-477-4408 (voice)


Why was the data set created?

King County's Elevation (digital ground model - DGM) Database has at its core a high-resolution base from lidar collected in 2002 and 2003. As new elevation data becomes available to infill missing areas (i.e., other sources for bathymetry data as lidar does not collect water areas), or becomes available that improves on the existing lidar base, it is appended to the elevation database. Where necessary, users may wish to obtain the source and vintage of information in the current database by using this map (or its underlying datafile - dgm_source.shp). The source data file also serves as an index to the various raw data files (zipped ascii files) that may exist for a given area in a location where multiple sources overlap.


How was the data set created?

  1. From what previous works were the data drawn?

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

    Date: 18-May-2011 (process 1 of 13)
    Added Watershed Science 2010 LiDAR data polygons

    Date: 28-Jul-2011 (process 2 of 13)
    Added Watershed Science 2011 LiDAR data polygons

    Date: 07-Nov-2012 (process 3 of 13)
    Polygons for 2001 Multibeam Bathymetry, 2003 Blue Green Bathymetry, Snohomish 2006, Kitsap 2000, and Pierce 2010 lidar data added

    Date: 14-Jan-2014 (process 4 of 13)
    Added Watershed Science 2012 LiDAR data polygons

    Date: 14-Jan-2014 (process 5 of 13)
    Added Watershed Science 2013 LiDAR data polygons

    Date: 11-Aug-2014 (process 6 of 13)
    Redefined Bathymetry polygon JB shape. Redefined JB01 polygons suffix to NOAA. Redefined JB03 polygons suffix to WADOE.

    Date: 10-Mar-2015 (process 7 of 13)
    Added Quantum Spatial- Watershed Science 2014 LiDAR data polygons and NOAA 2014 Bathymetry polygons

    Date: 01-Dec-2015 (process 8 of 13)
    Added Quantum Spatial- Watershed Science 2015 LiDAR data polygons

    Date: 07-Sep-2017 (process 9 of 13)
    Added Quantum Spatial- Watershed Science 2016 LiDAR data polygons

    Date: 07-Sep-2017 (process 10 of 13)
    Added Quantum Spatial- Watershed Science 2016 LiDAR data polygons

    Date: 14-Sep-2017 (process 11 of 13)
    Added Quantum Spatial- Watershed Science 2017 LiDAR data polygons

    Date: 25-Jul-2018 (process 12 of 13)
    Added Quantum Spatial- Watershed Science 2018 LiDAR data polygons

    Date: 29-Jul-2019 (process 13 of 13)
    Added Quantum Spatial- Watershed Science 2019 LiDAR data polygons

  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?

    None

  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?

    The project area source polygons cover the entire extent of the elevation database.

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

    Project area boundaries define extent of each projects contribution to the underlying 7500 data tile. Where project areas overlap, multiple versions of the tile will exist, each with a unique suffix defining the data sources in that tile. A tile is named with the most recent data source suffix even if the newest source contributes only a small portion to the extent of the new tile.


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:
King County data are made available with the understanding that they shall be used exclusively by the obtainer or his/her authorized agents. Digital products may not be reproduced or redistributed in any form or by any means without the express written authorization of King County.

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

    KCGIS Center
    Attn: Cheryl Wilder
    Data Sales Coordinator
    201 S Jackson St, Suite 700
    Seattle, WA 98104
    US

    206-477-4421 (voice)

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

    /plibrary2/survey/shapes/polygon/dgm_source.shp

  3. What legal disclaimers am I supposed to read?

    King County disclaims any warranty of use of any digital product or data beyond that for which it was designed.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 04-Feb-2021
Metadata author:
King County GIS Center
Attn: Victor High
GIS Analyst
201 S Jackson St, Suite 706
Seattle, WA 98104
US

206-263-4845 (voice)
victor.high@kingcounty.gov

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


Generated by mp version 2.9.12 on Sat Feb 13 19:04:40 2021