ALASKA1964_INUNDATION - Alaska 1964 Estimated Tsunami Inundation Line at Seaside, Oregon

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Frequently anticipated questions:


What does this data set describe?

Title:
ALASKA1964_INUNDATION - Alaska 1964 Estimated Tsunami Inundation Line at Seaside, Oregon
Abstract:
This data set is a polyline shapefile representing the tsunami inundation line for the Alaska 1964 event based on observations and associated information obtained by Tom Horning (1997). The polyline was digitized from a line drawn by Tom Horning on an orthophoto taken in 1997.
  1. How might this data set be cited?
    Horning, Tom, and NOAA Center for Tsunami Research, 2006, ALASKA1964_INUNDATION - Alaska 1964 Estimated Tsunami Inundation Line at Seaside, Oregon: Data Series 236, U.S. Geological Survey, Menlo Park, California.

    Online Links:

    This is part of the following larger work.

    Wong, Florence L., Venturato, Angie J., and Geist, Eric L., 2006, Seaside, Oregon Tsunami Pilot Study -- Modernization of FEMA Flood Hazard Maps: GIS Data: Data Series 236, U.S. Geological Survey, Menlo Park, California.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -123.939037
    East_Bounding_Coordinate: -123.910039
    North_Bounding_Coordinate: 46.036122
    South_Bounding_Coordinate: 45.975797
  3. What does it look like?
    http://pubs.usgs.gov/ds/2006/236/metadata/alaska1964_inundation.gif (GIF)
    Observations of the Alaska 1964 event as described by Fiedorowicz (1997) and updated by Horning.
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2006
    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):
      • String (1)
    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 1.000000. Longitudes are given to the nearest 1.000000. Latitude and longitude values are specified in Decimal degrees. 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.
  7. How does the data set describe geographic features?
    alaska1964_inundation
    name of shapefile (Source: none)
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    ID
    identification number (Source: ESRI) Default ESRI enumeration.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Tom Horning
    • NOAA Center for Tsunami Research
  2. Who also contributed to the data set?
    Tom Horning (Horning Geosciences)
  3. To whom should users address questions about the data?
    NOAA Center for Tsunami Research
    7600 Sand Point Way NE
    Seattle, Washington
    USA

    206-526-6556 (voice)
    Angie.J.Venturato@noaa.gov

Why was the data set created?

This data set is one of a collection of spatially referenced digital files in a geographic information system related to the Seaside, Oregon, Tsunami Pilot Study.
Federal Emergency Management Agency (FEMA) Federal Insurance Rate Map (FIRM) guidelines do not currently exist for conducting and incorporating tsunami hazard assessments that reflect the substantial advances in tsunami research achieved in the last two decades (Tsunami Pilot Study Working Group, 2006). Therefore, as part of the FEMA Modernization Program, a Tsunami Pilot Study was carried out in the Seaside/Gearhart, Oregon, area to provide information from which tsunami mapping guidelines could be developed. This area was chosen because it is typical of coastal communities in the section of the Pacific Coast from Cape Mendocino to the Strait of Juan de Fuca. There was also considerable interest shown by state agencies and local stakeholders in mapping the tsunami threat to this region. The study was an interagency effort by scientists from the U.S. Geological Survey, the National Oceanic and Atmospheric Administration, the University of Southern California, and the Middle East Technical University. We present the GIS data from that report in this publication.
These data are intended for science researchers, students, policy makers, and the general public. The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information.

How was the data set created?

  1. From what previous works were the data drawn?
    1997ortho (source 1 of 1)
    Horning, Tom, Unpublished Material, Runup Line for 1964 Tsunami, Seaside, Oregon, Good Friday Tsunami from the Great Alaska Earthquake.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 24000
    Source_Contribution:
    hand-drawn line representing tsunami inundation based on observation of the 1964 Alaska event
  2. How were the data generated, processed, and modified?
    Date: Aug-2004 (process 1 of 3)
    DATA CONVERSION. The paper map was scanned to a digital orthophoto tiff. Data sources used in this process:
    • ak64horning map
    Data sources produced in this process:
    • ak64horning
    Date: Aug-2004 (process 2 of 3)
    DIGITIZATION. The handdrawn line on the map was digitized to a polyline vector shapefile in map units. Data sources used in this process:
    • ak64horning
    Data sources produced in this process:
    • tmppoly
    Date: Aug-2004 (process 3 of 3)
    GEOREFERENCING. The vector shapefile was georeferenced by using USGS digital raster graphics to correlate map units to geographic coordinates. ShapeWarp 2.2 (Kenneth McVay) was used to convert the shapefile to geographic coordinates. Data sources used in this process:
    • tmppoly
    Data sources produced in this process:
    • Alaska1964_Inundation
  3. What similar or related data should the user be aware of?
    Tsunami Pilot Study Working Group, 2006, Seaside, Oregon Tsunami Pilot Study -- Modernization of FEMA Flood Hazard Maps: Open-File Report 2006-1234, U.S. Geological Survey, Menlo Park, California.

    Online Links:

    Fiedorowicz, B.K., 1997, Geologic evidence of historic and prehistoric tsunami inundation at Seaside, Oregon: Portland State University, Portland, Oregon.

    Online Links:

    Other_Citation_Details: Portland State University, M.S. Thesis

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

  1. How well have the observations been checked?
    contact Tom Horning Horning Geosciences Seaside, Oregon 97138
  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?
    Complete.
  5. How consistent are the relationships among the observations, including topology?
    The data set was checked for logical consistency by visually comparing the polyline to the hand-drawn line on the orthophoto.

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:
These data were created for the sole purpose of the Seaside, Oregon, Tsunami Pilot Study. It is not meant for navigational means. The National Oceanic and Atmospheric Administration makes no expressed or implied warranty regarding the accuracy of these data.
The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data on any other system.
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the National Oceanic and Atmospheric Administration (NOAA) as the originator of the dataset.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey
    Information Services Box 25286
    Denver, Colorado
    USA

    1-888-275-8747 (voice)
    infoservices@usgs.gov
  2. What's the catalog number I need to order this data set? Downloadable Data: U.S. Geological Survey Data Series 236
  3. What legal disclaimers am I supposed to read?
    Although these data have been used by the U.S. Geological Survey (USGS), U.S. Department of the Interior (DOI), no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.
    Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  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: 17-Jul-2006
Last Reviewed: Jul-2006
Metadata author:
NOAA Center for Tsunami Research
Attn: Angie J. Venturato
7600 Sand Point Way NE
Seattle, Washington
USA

206-526-6556 (voice)
Angie.J.Venturato@noaa.gov
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/westcoast/oregon/seaside/alaska1964_inundation.shp.faq.html>
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