Layer Name:	Tsunami Evacuation Zones

Coverage Name:	TSUNEVAC

Layer Type:	Polygon

Status:		Complete

Geog. Extent:	Islands of Kauai, Oahu, Molokai, Lanai, Maui and Hawaii

Projection:	Universal Trans Mercator, Zone 4 (Meters)

Datum:		NAD 83

Description:	Tsunami Evacuation Zones for the islands of Kauai, Oahu, 
		Molokai, Lanai, Maui and Hawai
		
Source:		Pacific Disaster Center (PDC), 1998.		

History:	(Text written by PDC Staff, 1998):

		Tsunami evacuation layers for the State were digitized from 
		Tsunami Evacuation Zone proof maps provided by the State of 
		Hawaii Civil Defense, and published in County Telephone 
		Directories by GTE in 1991.  These maps were produced by the 
		Joint Institute for Marine and Atmospheric Research, at the 
		University of Hawaii, in cooperation with the State of Hawaii 
		Civil Defense System.  Data from these maps were digitized in 
		the GIS program Arc View Version 3.0a using features from 
		island coastlines, roads, and the USGS 7.5 minute digital 
		raster graphics (DRGs).  Specific distances given on the maps 
		(for example:  "1900 feet from Farrington Highway") were 
		incorporated into the digitization.  Where no distances were 
		given, evacuation zone boundaries were estimated by topograph-
		ical characteristics, or approximated using surrounding 
		features such as roads.  In cases where evacuation zone bound-
		aries bordered roadways, selected roads from state DLG road 
		layer were extracted into the tsunami evacuation shape file for 
		accuracy.  No details of scale accompanied the paper proofs.
		
		Coastline and evacuation zone shape files for each island were 
		then made into coverages using ArcInfo Version 7.1.2, which 
		were subsequently appended into a single coverage for editing.  
		Arcedit was used to eliminate all dangling nodes, intersections, etc.  				
		Tolerances were set to minimize the alteration of zone boundaries.  
		Topology was built for each island, polygons labeled, and poly-
		gon attribute tables created.  Each polygon is associated with 
		a particular evacuation map, with the exception of two 
		polygons on Oahu maps which are areas of high ground (map #7), 
		and water (maps # 18-19) within evacuation zones.
		
		A coverage for the State was created from appended individual 
		island coverages in ArcInfo.


		NOTE:  It came to the attention of the persons working on this 
		project that many place names on the paper proof maps have 
		incorrect spelling.  In addition, there are populated areas 
		near sea level that are not included in any of the present 
		maps.  Two examples on Maui are Maliko Bay, and Kahakuloa Bay.


		
Attributes:	Polygons:

		AREA		area of polygon (sq. meters)
		PERIMETER	perimeter of polygon (meters)
		TSUNEVAC#	Polygon internal number (for Arc/Info use)
		TSUNEVAC-ID	Polygon ID (for Arc/Info use)
		ISLAND        	Island Name
		MAPNUM		Map # of evacuation zone as it appears in the
				county telephone directory.
		MAPNAME		Geographic area covered by each numbered evac-
				uation zone map, as it appears in the county
				telephone directory.
		
		
		Arcs:
		
		FNODE#		From Node Number (for Arc/Info use)
		TNODE#		To Node Number (for Arc/Info use)
		LPOLY#		Left Polygon Number (for Arc/Info use)
		RPOLY#		Right Polygon Number (for Arc/Info use)
		LENGTH		Length (meters)
		TSUNEVAC#	Arc Internal Number (for Arc/Info use)
		TSUNEVAC-ID	Arc ID (for Arc/Info use)
		
		
		
		
Contact:        Joan Delos Santos, Office of Planning, State of Hawaii, 
		PO Box 2359,Honolulu, Hi.  96804; (808) 587-2895.  
		email:  JDelos_Santos@dbedt.hawaii.gov