Layer Name:     USGS 7.5' Quadrangles

Coverage Name:  NEWQUADS

Layer Type:     Polygon

Status:         Complete

Geog. Extent:   Main Hawaiian Islands

Projection:     Universal Trans Mercator, Zone 4 (Meters)

Datum:          NAD 83

Description:    USGS 7.5' Quad boundaries for the main Hawaiian Islands.
		
Source:         USGS 7.5' Topo Maps.		

History:        Created by Rod Low in the NAD83 Datum using the 
                lat/long coordinates of the quad boundaries, and the ARC 
                GENERATE command.

Note:           In the late 1990's, the USGS recast the topo maps from the Old Hawaiian Datum to the NAD83
                Datum.  This results in a shift in position between the old quad boundaries and the new 
                quad boundaries, regardless of the Datum that they may be displayed in.  The reason that 
                there is a difference between the new quads and the old ones re-projected is that the 
                corners of the quads are actually different points on the surface of the earth.  In 
                other words, a point in Lat/Long in Old Hawaiian is different from that same coordinate 
                in NAD83.

                This layer represents the quadrangle boundaries from the new, NAD83 
                quadrangle maps.  

                Two Molokai quads (Kamalo and Halawa) added Jan. 2006.  Also modified Lualailua Hills quad
		boundary by lowering the southern boundary to include the coastline.
		
Attributes:     Polygons:

                AREA            Area of polygon (sq. meters)
                PERIMETER       Perimeter of polygon (meters)
                QUADS#          Polygon internal number (for Arc/Info use)
                QUADS-ID        Polygon ID (for Arc/Info use)
                QNAME           Quad Name 
                FILENAME        Name of the original USGS file containing the coordinates
		
		
		
                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)
                QUADS#          Arc Internal Number (for Arc/Info use)
                QUADS-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