Metadata - Canada Hydrologic Units (Subsubdivisions)

GEODATASET NAME: OGLSSUBSUB250

IDENTIFICATION INFORMATION

Description:
    Hydrologic subsubdivisions comprising the Ontario Great Lakes 
    SOLEC (OGLS) study area subsub-based spatial reporting units.
Abstract:
    1:2M-scale subsub-basins for processing and reporting on the 
    suite of GLS landscape metrics using the ATtILA metric modules.
Data Type:
    Coverage, polygon
Data Originator:
    Geomatics for Sustainable Development of Natural Resources
    Environment Canada
    Ottawa, ON
Data Processors:
    Rick Van Remortel, Ed Evanson, Lee Bice
    Lockheed Martin Environmental Services
    1050 E. Flamingo Road, Suite E120
    Las Vegas, NV 89119
    (702)897-3295
    rvanremo@lmepo.com
Data Provider:
    Ricardo Lopez, Ph.D.
    U.S. Environmental Protection Agency
    National Exposure Research Laboratory
    P.O. Box 93478
    Las Vegas, NV 89193-3478
    (702)798-2394
    lopez.ricardo@epa.gov
Keywords:
    Great Lakes, Ontario, SOLEC, subsubdivisions, hydrology
Version:
    N/A
Status:
    Interim
Revision Number:
    0
Series Name:                    
Online Link (URL):              
Time Period of Content:
Use Constraints:
Purpose:
    OGLS data analysis
Date of metadata entry/update:
    01/24/2004
 
No Publication Information Available
No File Security Information Available
  
DATA QUALITY INFORMATION
 
Cloud Cover:
    Not applicable
Software:
    ArcGIS Workstation 8.2 ArcInfo and Grid
Operating System:
    WindowsXP on PC
Path Name:
    v:\solec\ontario\gds\oglssubsub250
Logical Consistency Report:
    Not presently available
Completeness Report:
    Not presently available
Horizontal Positional Accuracy:
    Not presently available
Vertical Positional Accuracy:
    Not presently available
Attribute Accuracy:
    Not presently available
Procedures:
    This coverage of 53 subsubdivisions were initially extracted from 
    the Ontario portion of the Canada Land Inventory derived drainage 
    area boundaries at the sub-sub-basin level to define the OGLS study 
    area. The consensus at the beginning of the project was that there 
    was no perfect method for defining the 'exact' extent of the Great 
    Lakes region because of the lack of a common (shared) spatial 
    reporting unit for the U.S. and Canada.  A conservative approach 
    would have included all Huc8s or Subsubs that drain an area upstream 
    of the mouth of Lake Ontario proper (i.e., excluding the St. Lawrence 
    Seaway and its immediate tributaries).  A more liberal approach would 
    have included all Huc8s and Subsubs that drain an area more-or-less 
    upstream of the western outskirts of Montreal, including the Ottawa 
    River watershed.  Neither of these options were graphically appealing, 
    as they don't offer a suitable 'pour point' that defines the mouth of 
    the basin comparable for both the U.S. and Canada reporting units.  
    A third option was proposed, which would include Huc8s and Subsubs 
    upstream from approximately the midpoint of the above two options, 
    near Cornwall, Ontario.  This option was, in our opinion, more 
    graphically pleasing than the other two, and provided a common 
    pour point and consistent land area basis for the internationally 
    defined study area basin.  It is what was ultimately selected as the 
    basis for our study. The coverage was reduced in its shoreline 
    complexity through ArcInfo generalization, dissolution, and elimination 
    steps to produce a coverage that was functionally similar to the 
    corresponding GLS Huc8 watersheds coverage used on the U.S. side. 
Reviews Applied to Data    
    Lockheed Martin Environmental Services internal review
Related Spatial Data Files:
    All geodatasets with ogls prefix
Other References Cited:  
Notes:
Update Frequency:
    As needed
 
SPATIAL REFERENCE INFORMATION

             Description of DOUBLE precision coverage oglssubsub250

                                FEATURE CLASSES

                                    Number of  Attribute     Spatial
Feature Class          Subclass     Features   data (bytes)  Index?   Topology?
-------------          --------     ---------  ------------  -------  ---------
ARCS                                      160
POLYGONS                                   54        82      Yes      Yes
NODES                                     250

                               SECONDARY FEATURES

Tics                                        4
Arc Segments                             6396
Polygon Labels                             53

                                   TOLERANCES

Fuzzy   =                 0.000 V          Dangle  =                 0.000 V

                               COVERAGE BOUNDARY

Xmin =               390333.965            Xmax =              1647914.911
Ymin =              2152046.676            Ymax =              3100387.026

                                     STATUS

The coverage has not been Edited since the last BUILD or CLEAN.

                          COORDINATE SYSTEM DESCRIPTION

Projection               ALBERS
Datum                     NAD83
Units                    METERS             Spheroid                GRS1980
Parameters:
1st standard parallel                                   29 30  0.000
2nd standard parallel                                   45 30  0.000
central meridian                                       -96  0  0.000
latitude of projection's origin                         23  0  0.000
false easting (meters)                                       0.00000
false northing (meters)                                      0.00000

ENTITY AND ATTRIBUTE INFORMATION
Annotation Name:

ATTRIBUTE LISTING FOR: oglssubsub250.pat

COLUMN   ITEM NAME       WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME INDEXED?
    1  AREA                  8    18     F      5                    -
    9  PERIMETER             8    18     F      5                    -
   17  OGLSSUBSUB250#        4     5     B      -                    -
   21  OGLSSUBSUB250-ID      4     5     B      -                    -
   25  SUBSUBDIV             4     4     C      -                    -
   29  SUBDIV                3     3     C      -                    -
   32  SUBDIVNAME           50    50     C      -                    -

METADATA REFERENCE SECTION
 
FGDC Content Standards for Digital Geospatial Metadata
FGDC Standards Version 6/98 / metadata.aml ver. 1.3 5/21/99

SUPPLEMENTAL METADATA (where available)

          CANADA LAND INVENTORY LEVEL-I DIGITAL DATA

          CANADA WATERSHEDS (Sub-Sub Drainage Basins)

SCALE           : 1:2,000,000           ATTRIBUTE LENGTH: 117
PROJECTION      : lat/lon               RESOLUTION:  : .00392 degrees
DATUM           : NAD27

ATTRIBUTE SCHEMA:

          SUBDIV               CHAR (3)
          SUBSUBDIV            CHAR (4)
          SUBDIVNAME           CHAR (50)
          NOMSUBDIV            CHAR (60)

NARRATIVE

       This coverage was digitized from a published Environment Canada Map
       depicting active and discontinued hydrometric stations operated by
       Water Resources Branch from 1972 to 1977. The coverage dipicts
       primary, secondary and tertiary drainage basins across Canada.

       The data was digitized by Lands Directorate in the late 1980's and
       were revized by Water Survey of Canada before digitization. Therefore
       the boundaries and delineations may not be exactly as found on the
       published map series.

VALID CODES
      
       SUBSUBDIV is a 4-character code for the drainage sub-sub-division:
           The first three characters are the same as the sub-division
           code above; the last alphabetic code further breaks down the
           drainage basins by principal river. Drainage sub-sub-divisions
           are not named.
       SUBDIV is a 3-character code for the drainage sub-division:
           The first two characters are always numeric and represent
           the primary drainage division; the last character is
           always alphabetic and represents the first order drainage
           sub-division. Drainage sub-divisions are named (see below).
       SUBDIVNAME is the name of the drainage sub-division.

NOTE(S):

1) This coverage in intended to be utilized with the corresponding 1:1Million
   International Map of the World (IMW) Shoreline series using the shoreline
   coverage as a "cookie cutter" effect. Drainage boundaries in this coverage
   are intentionally extended into the water to avoid duplicate shoreline
   representation.

2) This coverage was originally digitized using an IMW map convention but
   was subsequently extracted on an NTS "block" basis. Block and map numbers
   are derived from the NTS map naming convention, e.g. block 031 corresponds
   to the area covered by NTS sheets 31a to 31p at 1:250,000 scale. All blocks
   are 8 degrees wide by 4 degrees high, except for the Northern most blocks
   (120, 340 and 560, from East to West resp.) which are 16 degrees in width.