                                DATA DICTIONARY
                                ***************

COVERAGE NAME:  {county}lake

DATA DESCRIPTION:  Hydrography polygon coverages for NJ counties

KEYWORDS:  hydrography, rivers, streams, lakes


                                   CONTACTS
                                   ********

AGENCY:  BGSA
NAME:    Lou Jacoby
ADDRESS: CN 428
         Trenton, NJ   086250428
PHONE:   633-1203


                            MANUSCRIPT MAP INFORMATION
                            **************************

BASEMAP:     USGS Topoquads             COORDINATE SYSTEM:  NJ State Plane Feet
MAP DATE:    Various                    DATUM:              NAD27
SCALE:       24000                      MAP ACCURACY:       Complies with NMAS
PROJECTION:  Polyconic                  GEOGRAPHIC AREA:    County
MAP MEDIA:   Mylar                      FEATURE TYPE:       Poly

MAPPING METHODOLOGY AND MAPPING SOURCES:
   Original map source is the USGS 1:24,000 hydrography digital line graph (DLG)
   files.  Line work was updated using the 1986 orthophoto quads.  Several quad
   coverages had to be generated in-house (from orthophotos) including:  Marmora,
   New Gretna, Oceanville, Tuckerton, and Point Pleasant.

MAPPING CRITERIA:
   The hydrography data layer (comprised of the waterbody polygon coverage and the
   stream network line coverage) was initially generated by major drainage basin.
   The county coverages were clipped from the drainage basin coverages.

MAPPING ACCURACY AND DATA LIMITATIONS:
   Basemap (photoquad) feature positions are good to about +/- 60 feet or better.
   Delineated lines are good to about +/- 50 feet from locations on manuscript.
   Coastline data was integrated from NJDEPE 1986 Coast coverage.


                                MAP AUTOMATION
                                **************

AUTOMATION DATE:                         COORDINATE SYSTEM:  NJ State Plane Feet
                                         DATUM:  NAD27 (Projected to NAD83)

AUTOMATION METHODS:  USGS DLG files, and manual digitizing
PRODUCTION STAFF:    NJDEPE, ESRI - Redlands, CA
AUTOMATION STATUS:   linework complete, additional database items may be added
DATA AVAILABILITY:   ARC/INFO Export (DOS) on CD

CARTOGRAPHIC QUALITY:
   Data has been systematically plotted on mylar and checked to basemap.
   Nodeerrors, labelerrors and slivers resolved.  Features are within +/- 80
   feet or better of locations on 1986 photoquads

DISTRIBUTION RESTRICTIONS:
   Requires Data Distribution Agreement.


                                MAP ATTRIBUTES
                                **************

DATABASE:  Info

 ITEM NAME                   DESCRIPTION
 ---------                   -----------
NAME                     -   Waterbody name (taken from Geonames or county maps)
MODULE                   -   USGS quad number (1-178)
WATBOD                   -   Waterbody attribute code:  Rivers (1), lakes (2)
                             man-made lakes? (3), land islands (8)
HUC11                    -   Hydrologic Unit Code (from basins -> huc11 coverage) to which
                             the stream belongs.
                                                

LOOKUP AND/OR RELATED DATA FILES:
   No lookup or relate data files.

ATTRIBUTE QUALITY:
   Frequencies run to check for valid attributes.  Visual inspection of proof plots
   with polygon attributes.
