Wells, Maine National Estuarine Research Reserve Digital Line BoundaryEntry ID: WELLS_NERR_PAGIS_DIGITAL_LINE_BOUNDARY
Abstract: The Wells National Estuarine Research Reserve (NERR) digital boundary
was created as part of the Protected Areas Geographic Information System
(PAGIS) project. An updated digital version of Wells's boundary was critical to
the PAGIS project. The digital boundary was delineated from management and
research areas within the Reserve. It was not based on legal definitions.
Purpose: The PAGIS project provided each NERR with a fully integrated
geographic information system (GIS), encompassing spatial data and Internet
capabilities. One of the essential GIS data layers being compiled for each
Reserve was a digital boundary. The Reserve boundary was delineated based on
management and research areas and is not meant to be a legal description of the
SUPPLEMENTAL ... INFORMATION: This boundary is not to be taken as a legal
definition of the NERR boundary. It was created based on management and
research areas of the Reserve.
SPATIAL DATA ORGANIZATION INFORMATION
Direct Spatial Reference: Vector
SDTS Point and Vector Object Type: Complete Chain
Point and Vector Object Count: 204
SPATIAL REFERENCE INFORMATION - PLANAR
Grid Coordinate System Name: Universal Transverse Mercator
UTM Zone Number: 19
Scale Factor at Central Meridian: 0.999600
Longitude of Central Meridian: -69.000000
Latitude of Projection Origin: 0.000000
False Easting: 500000.000000
False Northing: 0.000000
Planar Coordinate Encoding Method: Coordinate pair
Abscissa Resolution: 1
Ordinate Resolution: 1
Planar Distance Units: Meters
SPATIAL REFERENCE INFORMATION - GEODETIC MODEL
Horizontal Datum Name: North American Datum of 1927
Ellipsoid Name: Clarke 1866
Semi-major Axis: 6,378,206.4
Denominator of Flattening Ratio: 294.98
NATIVE: Arc/Info coverage format m:\nep2\pagis\wel\final\welnerr
(Click for Interactive Map)
Data Set Citation
Dataset Originator/Creator: NOAA Coastal Services Center.
Dataset Title: Wells, Maine National Estuarine Research Reserve Digital Line Boundary
Dataset Release Date: 1999-05-01
Dataset Release Place: Charleston, South Carolina
Dataset Publisher: NOAA Coastal Services Center
Data Presentation Form: MapOnline Resource: http://www.csc.noaa.gov
This data set description is a member of a collection. The collection is described in
Start Date: 1998-09-09Stop Date: 1999-04-29
Quality ATTRIBUTE ACCURACY REPORT: The original attributes provided with the original
digital file could not be tested for accuracy, but are believed to be accurate.
All attributes created during the editing process were verified by displaying
the lines in both the database and the spatial coverage.
LOGICAL CONSISTENCY REPORT: These data are believed to be logically ... consistent,
though no tests were performed. Line geometry is topologically clean.
COMPLETENESS REPORT: The boundary of the Reserve is dependent on the shoreline
and/or edges of rivers and bays as delineated on a USGS 7.5 minute Topographic
Map. The edges or borders of the boundary might change as the natural land
changes or better maps and aerial photography become available. The boundary
was not based on legal parcels or definitions; therefore, the core boundary is
a management/research boundary not a legal boundary.
HORIZONTAL POSITIONAL ACCURACY REPORT: These data were created by delineating
the boundaries off USGS 7.5 minute Topographic Maps at 1:24000 scale.
Therefore, the horizontal accuracy is assumed to be within National Map
Accuracy Standards, with a horizontal accuracy of 45.6 feet at the 95%
VERTICAL POSITIONAL ACCURACY REPORT: These data were delineated off USGS 7.5
minute Topographic Maps at 1:24000 scale. Therefore, the vertical accuracy is
assumed to be within National Map Accuracy Standards, with a vertical accuracy
of 11.9 feet at the 95% confidence level.
PROCESS DESCRIPTION: The upper boundary, from the US Fish and Wildlife Service,
was imported into ARC/INFO as a coverage from an ARC/INFO export file. The
lower boundary was imported into ARC/INFO from an ARCVIEW shapefile. The
coverages were appended together to form one boundary file. The coverage was
then edited to delete extra parts of the boundary file located in the northern
part of the file. The Wells National Estuarine Research Reserve (NERR) provided
comments as to how to edit the file down to just the Wells Reserve. The
corrections were made by on-screen digitizing with a USGS topographic map as
the backdrop. Once the corrections were done, the new boundary was printed on a
USGS topographic map and sent to the Reserve for verification. The Reserve had
additional changes that were sent back to the Coastal Services Center and
incorporated into the boundary coverage. Each arc of the boundary file was
coded to reflect the change made and the source and confidence of that change.
The coverage was then projected to the final projection used by the individual
Reserve. PROCESS DATE: 19980909
SOURCE INFORMATION - CITATION: U.S. Fish and Wildlife Service. Upper Wells
Division of Rachel Carson NWR. Lower Wells Division of Rachel Carson NWR.
1998-08-12. 1999-04-20. GEOSPATIAL DATA PRESENTATION FORM: map.
SOURCE SCALE DENOMINATOR: 24000.
TYPE OF SOURCE MEDIA: USGS Topographic Map.
BEGINNING TIME: unknown.
ENDING TIME: 19980801.
SOURCE CURRENTNESS REFERENCE: publication date.
SOURCE CITATION ABBREVIATION: USFWS.
SOURCE CONTRIBUTION: Vector data representing the upper portion of the Rachel
Carson NWR which incorporates the Wells NERR
Access Constraints ACCESS CONSTRAINTS: none
DISTRIBUTION LIABILITY: Users must assume responsibility to determine the
appropriate use of these data. The boundary is not to be used for a LEGAL
definition. Please contact the individual Estuarine Research Reserve for more
detailed information if required.
CUSTOM ORDER PROCESS: Contact NOAA Coastal Services Center PAGIS Specialist for
a printed copy of the boundary map or for an ESRI coverage or shapefile of the
Use Constraints NOT FOR LEGAL USE
Data Set Progress
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Email: csc at csc.noaa.gov
NOAA Coastal Services Center 2234 South Hobson Avenue
Province or State: SC
Postal Code: 29405-2413
Creation and Review Dates
DIF Creation Date: 1999-05-01
Last DIF Revision Date: 2006-06-01