Federal Emergency Management Administration Florence L. Wong 2006 1 map http://pubs.usgs.gov/ds/2006/236/catalog.shtml Florence L. Wong Angie J. Venturato Eric L. Geist 2006 raster digital data U.S. Geological Survey Data Series 236 Menlo Park, California U.S. Geological Survey http://pubs.usgs.gov/ds/2006/236/ FEMA's Flood Insurance Rate Map (FIRM) depicts the spatial extent of Special Flood Hazard Areas (SFHAs) and other thematic features related to flood risk assessment. FIRMs also provide a basis for establishing flood insurance coverage premium rates offered through the National Flood Insurance Program (NFIP). These maps were published as paper documents, which have been scanned into image files (TIFF) as part of FEMA's FIRM modernization process. This is one of three scanned maps for the Seaside-Gearhart area - 410030 0001 D, 410032 0001 C, and 410032 0002 C - that were georeferenced for the probabilistic tsunami hazard assessment project. This data set is one of a collection of digital files of a geographic information system of spatially referenced data 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 FEMAs 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 area. 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. The following explanatory text was transcribed from Flood Insurance Rate Map 410027 0019 B, Clatsop County (Unincorporated Areas), revised June 16, 1999 (FEMA, 1999). Elevations referenced to the National Geodetic Vertical Datum of 1929 (NGVD29). Zone A: Areas of 100-year flood; base flood elevations and flood hazard factors not determined. Zone A0: Areas of 100-year shallow flooding where depths are between one (1) and three (3) feet; average depths of inundation are shown, but no flood hazard factors are determined. Zone AH: Areas of 100-year shallow flooding where depths are between one (1) and three (3) feet; base flood elevations are shown, but no flood hazard factors are determined. Zone A1-A30: Areas of 100-year flood; base flood elevations and flood hazard factors determined. Zone A99: Areas of 100-year flood to be protected by flood protection system under construction; base flood elevations and flood hazard factors not determined. Zone B: Areas between limits of the 100-year flood and 500-year flood; or certain areas subject to 100-year flooding with average depths less than one (1) foot or where the contributing drainage area is less than one square mile; or areas protected by levees from the base flood. (Medium shading) Zone C: Areas of minimal flooding. (No shading) Zone D: Areas of undetermined, but possible, flood hazards. Zone V: Areas of 100-year coastal flood with velocity (wave action); base flood elevations and flood hazard factors not determined. Zone V1-V30: Areas of 100-year coastal flood with velocity (wave action); base flood elevations and flood hazard factors determined. 1981 publication date Complete None planned -123.930728 -123.898978 46.038680 46.013240 none probabilistic tsunami hazard assessment tsunamis coastal geology PTHA tsunami probability tsunami hazard FEMA FIRM flood insurance rate map ISO 19115 Topic Category environment geoscientificInformation oceans Geographic Names Information System Seaside, Oregon Gearhart, Oregon Oregon USA GEOnet Names Server north Pacific Ocean None. 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. 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% and 0.2%. The data, digital results, GIS layers, and map products are not intended for other uses. In particular, the 1% and 0.2% 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. Please recognize the U.S. Geological Survey (USGS) as the source of this information. Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, 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 U.S. Geological Survey in the use of this data, software, or related materials. This information is not intended for navigational purposes. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Florence L. Wong U.S. Geological Survey Geologist mailing and physical address

345 Middlefield Road, MS 999

Menlo Park California 94025 USA 650-329-5327 650-329-5190 fwong@usgs.gov http://pubs.usgs.gov/ds/2006/236/metadata/f41003.jpg FEMA Flood Insurance Rate Maps for the Seaside-Gearhart, Oregon, Area JPEG Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.1.0.722 Tsunami Pilot Study Working Group 2006 1 U.S. Geological Survey Open-File Report 2006-1234 Menlo Park, California U.S. Geological Survey http://pubs.usgs.gov/of/2006/1234/ Data set is a raster image and contains no attribute information. No tests for logical consistency were conducted Complete. The FEMA Flood Insurance Rate Map images presented here are georeferenced to USGS DRGs for comparison to data produced by probabilistic tsunami hazard assessment (PTHA). The exact placement of any geographic feature as portrayed in these edited images has not been verified. Federal Emergency Management Administration 1999 FEMA Flood Insurance Rate Map Community-panel number 410030 0001 D scale: 1 inch = 600 feet: 1:7,200; initial identification: December 7, 1973; Flood hazard boundary map revision: December 19, 1975; Flood insurance rate map effective: May 15, 1978; Flood insurance rate map revisions: January 3, 1983; Map revised June 16, 1999 to update corporate limits, to add base flood elevations, to add special flood hazard areas, and to change zone designations 7200 digital image of paper map 1999 publication date FEMA, 1999 map TIFF images of paper FEMA Flood Insurance Rate Maps were registered to USGS Digital Raster Graphics images for the Seaside-Gearhart, Oregon, area using a second-order polynomial transformation and saved as an Arc grid. The grid was clipped to the data area and converted to a TIFF (.tif) image. 2005 Raster Pixel 5598 4851 1 Universal Transverse Mercator 10 0.999600 -123.000000 0.000000 500000.000000 0.000000 row and column 0.500000 0.500000 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Raster image of FEMA Flood Insurance Rate Map none. U.S. Geological Survey mailing address

USGS Information Services

Box 25286

Denver Colorado 80225-0286 USA 1-888-275-8747 infoservices@usgs.gov U.S. Geological Survey Data Series 236 This information is not intended for navigational purposes. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. TIFF 3.3 http://pubs.usgs.gov/ds/2006/236/ None Geographic information systems (GIS) software is necessary for access to all features of the data set, but image formats may be viewed by other graphics software. 20060726 U.S. Geological Survey Florence L. Wong Geologist mailing and physical address

345 Middlefield Road, MS 999

Menlo Park California 94025 USA 650-329-5327 650-329-5190 fwong@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile