Layer Name:     USGS 7.5' Quadrangles (Published before 1998)

Coverage Name:  OLDQUADS

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 OSP staff in the Old Hawaiian Datum using the 
                lat/long coordinates of the quad boundaries, and the ARC 
                GENERATE command with the FISHNET option.

		2003:  Converted to NAD83 Datum.

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 original, Old Hawaiian 
                quadrangle maps.   
		
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 
                QNUM            Quad Number
		
		
		
                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