Layer Name: Coral Reefs (from NOAA Nautical Charts) Shapefile Name: CoralReefs_nc Layer Type: Polygon Status: Complete Geog. Extent: Main Hawaiian Islands Projection: Universal Trans Mercator, Zone 4 (Meters) Datum: NAD 83 Description: This dataset contains those coral reefs located in marine waters within the vicinity of the main Hawaiian Islands and recorded on the nautical charts. Source : NOAA Nautical Charts History: The raster nautical charts were first reprojected from their original projection/datum to UTM Zone 4, NAD 83 using NOAA's Nautical Chart Reprojector v1.8.3. NOAA's ArcView ChartViewer extension was used to display the reprojected nautical charts in ArcView v3.2. Subject areas were then digitized off the individual nautical charts and merged into a single dataset/shapefile which covers the entire state. Completed December, 2002. Attributes: Polygons: AREA Area of polygon in square meters PERIMETER Perimeter of polygon in meters ID Polygon ID ACRES Area of polygon in acres CHART1 Source chart from which object was digitized CHART2 Secondary source chart from which object was digitized NOTES Notes pertaining to individual objects as reported on the nautical charts SOURCETHM Xtools generated during "merge themes" process NOTE: Data not to be used for navigational purposes. Data were not reviewed or authenticated by the Office of Coast Survey, NOAA National Ocean Service. NOAA is not responsible for the use of these data as a navigational tool. 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