NOAA's ENC Direct to GIS web portal provides comprehensive access to display, query, and download all available large scale NOAA ENC data in a variety of GIS/CAD formats for non-navigational purposes using Internet mapping service technology. A defined (and possibly named) administrative area. Note: The following data layers were downloaded from the NOAA ENC web site by Massachusetts Coastal Zone ... Management (CZM) on July 18, 2006: TRAFFIC SEPARATION SCHEME and PRECAUTIONARY AREA. These layers were converted to the ESRI shapefile format and reprojected from their native projection into North American Datum 1983 (NAD83) / Massachusetts State Plane coordinate system, Mainland Zone (Fipszone 2001) meters. All three shapefiles were merged in ArcGIS 9.1. Edits to fix topologic and geographic errors were made on August 18, 2006.
NOAA ENC Direct to GIS Internet Mapping Service is designed to allow for the visualization, querying and downloading of NOAA's Electronic Navigational Chart's (NOAA ENC) data in common Geographic Information System (GIS) formats.
SUPPLEMENTAL INFORMATION: Distribution Format - AutoCAD DWG (R2000), AutoCAD DXF (R2000), Caris NTX, ESRI Arc/Info Coverage, ESRI Arc/Info Export (E00), ESRI Arc/Info ... Generate, ESRI Shape, MapInfo MID/MIF, MapInfo TAB.
CURRENTNESS REFERENCE: This layer is up to date with the latest edition enc cells through publication date on site.
SPATIAL DATA ORGANIZATION INFORMATION
Direct Spatial Reference: Vector
SDTS Point and Vector Object Type: G-polygon
Point and Vector Object Count: 35
SPATIAL REFERENCE INFORMATION - PLANAR
Grid Coordinate System Name: State Plane Coordinate System
SPCS Zone Identifier: 2001
Standard Parallel: 41.716667
Standard Parallel: 42.683333
Longitude of Central Meridian: -71.500000
Latitude of Projection Origin: 41.000000
False Easting: 200000.000000
False Northing: 750000.000000
Planar Coordinate Encoding Method: coordinate pair
Abscissa Resolution: 0.001024
Ordinate Resolution: 0.001024
Planar Distance Units: meters
SPATIAL REFERENCE INFORMATION - GEODETIC MODEL
Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257222
NATIVE: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 188.8.131.520