Seaside, Oregon, Tsunami Pilot Study—Modernization of FEMA Flood Hazard Maps: GIS Data

DATA CATALOG

GIS data files

Introduction

Each GIS data theme is listed with a brief description, links to illustrations, metadata files, and downloadable files. The data were compiled in ArcGIS (version 9.1 ESRI, 2005). The downloadable files have been compressed with Winzip and may be extracted with Winzip on Microsoft Windows operating systems. The numbers following ".zip" indicate the size of the downloadable file. Downloadable files include data, metadata, projection parameters, and a browse graphic. Metadata is provided in text, hypertext mark-up language (html), frequently-asked-questions (FAQ), and extensible mark-up language (xml) formats. Projection parameters are listed in each .prj file. Browse graphics are JPEG or GIF images. The file size is listed for links to any files on this site that exceed 60 KB.

Point, line, and polygon features are shapefiles in unprojected geographic coordinates (decimal degrees) with horizontal datum NAD83. The compressed download file for a shapefile includes files with standard extensions .shp (shape), .shx (shape index), .dbf (dBASE), .sbn (spatial bin), and .sbx (spatial bin index).

Raster data layers (Arcinfo grids) are provided as xyz coordinate files (.xyz) and as ArcGIS ASCII raster files (.asc). Files with the .asc extension can be converted to Arcinfo grids with the ArcGIS ASCII to raster tool.

Images are georeferenced TIFF files in UTM Zone 10 coordinates with datum NAD83. The download file for a TIFF image includes the image (.tif), the world registration file (.tfw), as well as the usual projection , metadata, and browse files.

ESRI Arcmap and ArcReader Files. To view selected data themes with ESRI products Arcmap or ArcReader, download seaside.zip (compressed, 16 MB; uncompressed, 28 MB) and unzip with Winzip (extract with "use folder names" option) to an unused directory. Seaside.mxd is viewed with the licensed product ArcGIS. Seaside.pmf is viewed with ESRI ArcReader, which may be downloaded without charge from http://www.esri.com/software/arcgis/arcreader/. The data layers are included in the zip file.

Google Earth Files. Entries labeled kmz are links to files that may be viewed with Google Earth, a virtual globe data viewer. SeasideGIS.kmz (3 MB) includes all the kmz files listed in the table below. A free version of Google Earth (v. 3 or 4 beta) may be downloaded from http://earth.google.com/download-earth.html. Selecting the kmz link will open Google Earth and display the data layer with its legend (if available). The data layers are listed in the table of contents under Places > Temporary Places, with on/off checkmarks and a transparency control. See http://earth.google.com/support for other instructions for the interface.

Data Use Constraints. The data, digital results, GIS layers, and map products in this database have been created specifically as part of a pilot study for FEMA's modernization of Flood Insurance Rate Maps (FIRMs) project (Tsunami Pilot Study Working Group, 2006). The results of the pilot study are intended to help FEMA draft new guidelines related to tsunami flooding for Coastal Flood Hazard Analysis and Mapping for the Pacific Coast of the United States. The results are intrinsically probabilistic and designed according to FEMA flood zone specifications: annual probabilities of exceedance of 1 percent and 0.2 percent. The data, digital results, GIS layers, and map products are not intended for other uses. In particular, the 1 percent and 0.2 percent annual exceedance probability tsunami flood maps are not to be used for emergency planning, evacuation, or other insurance purposes. Please refer to the National Tsunami Hazard Mitigation Program tsunami inundation maps for use in emergency planning.

None of the data presented is intended for navigational purposes. Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government. Use of information from this publication concerning proprietary products or the tests of such products for publicity or advertising purposes is not authorized. All wave heights are relative to mean high water.

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Data Description

References

kmz mhw (181 kb)

kmz mllw

seasdemsxyz.zip (20 MB)

text html FAQ xml

text html FAQ xml

text html FAQ xml

iygxyz.zip (2 MB)

iygaa1asc.zip (0.5 MB)

iygaa1xyz.zip (2 MB)

iygtd480asc.zip (0.5 MB)

iygtd480xyz.zip (2 MB)

iygtd560asc.zip (0.5 MB)

html 500 kmz (0.3 MB)

exrate.zip (0.4 MB)

Oregon Department of Geology and Mineral Industries http://www.oregongeology.com/

University of Oregon Libraries http://libweb.uoregon.edu/map/

USGS Seamless Data Distribution System http://seamless.usgs.gov/

NOAA National Ocean Service http://www.nos.noaa.gov/