     CANADA LAND INVENTORY LEVEL-I LAT/LONG DIGITAL DATA
              CLI LAND USE (circa 1966)

1. Coverage Specifications

   Original Map Scale: 1:250,000, except for British Columbia
                       where the original scale was 1:125,000

   Resolution        : .00024414 of a degree which
                       corresponds to approximately 25 meters

   Map Projection    : None, i.e., latitude/longitude

   Datum             : NAD27

   Spheroid          : Clarke 1866

   Units of Measure  : decimal degrees

2. CLI Level I Latitude/Longitude Digital Data

   CLI Level I latitude/longitude digital data are intended
   for GIS users who wish to integrate in CLI thematic data
   with their own topological base maps, i.e. for GIS users
   who wish to "cookie-cut" the CLI thematic layers with
   their own topological shoreline layer.

   CLI Level I thematic data is intentionally extended past
   the shoreline and as such does not contain the proper
   definition of shoreline. The data are not projected and
   coordinates, areas and perimeters are in decimal degrees.

   DO NOT ATTEMPT TO DERIVE AREA STATISTICS FROM THESE DATA
   UNTIL THEY ARE INTEGRATED WITH A PROPER SHORELINE AND THE
   RESULTS PROJECTED TO A SUITABLE MAP PROJECTION.

   If the above restrictions do not meet your GIS objectives,
   obtain the equivalent Level II UTM data with integrated
   base map from the same distribution source.

3. Attribute Schema (Polygon Attribute Table - PAT.DBF)

 a) Standard ArcInfo Polygon Attribute Table (PAT) variables:

    AREA        Num 13,6    Area, in square degrees
    PERIMETER   Num 13,6    Perimeter, in decimal degrees
    COVER_#     Num 11,0    Standard ArcInfo Polygon Number
    COVER_ID    Num 11,0    Standard ArcInfo User ID

 b) Original Digital Data Classification:

    Use_A       Char 1     The primary and/or dominant land
                           use code

    Percent_A   Char 1     The proportion (% base 10) of the
                           polygon in Use_A (blank = 100%)

    Subclass_A  Char 1     The subclass code for Use_A

    Spare_A     Char 1     Un-used (blank)

    Use_B       Char 1     The secondary land use code

    Percent_B   Char 1     The proportion (% base 10) of the
                           polygon in Use_B (Blank = 0%)

    Subclass_B  Char 1     The subclass code for Use_B

    Spare_B     Char 1     Un-used (blank)

    Use_C       Char 1     The tertiary land use code

    Percent_C   Char 1     The proportion (% base 10) of the
                           polygon in Use_C (blank = 0%)

    Subclass_C  Char 1     The subclass code for Use_C

    Spare_C     Char 1     Un-used (blank)

4. Valid CLI Land Use Codes

    B - Urban built-up area
    E - Mines, quarries, sand and gravel pits
    O - Outdoor recreation
    H - Horticulture
    G - Orchards and vineyards
    A - Cropland
    P - Improved pasture and forage crops
    K - Unimproved pasture and range land
    T - Productive woodland
    U - Non-productive woodland
    M - Swamp, marsh or bog
    S - Unproductive land - sand
    L - Unproductive land - rock
    8 - Unmapped areas (see note below)

        Note: In the special case where Use_A is coded as '8',
              Subclass_A is coded as follows:

     Blank Unmapped area
     Z     Water Area
     T     Forest Reserves
     O     National Parks
     B     Urban Areas
     W     Provinical Parks


5. Valid CLI Land Use Subclasses

   They are valid only in conjunction with uses A and P.
   The acceptable combinations and their significance are:

   USE  SUBCLASS    INTERPRETATION
   ===  ========    ==============

   A    BLANK       95.0% - 100.0% cropland
   A    1           75.0% -  94.9% cropland
   A    2           50.0% -  74.9% cropland
   P    BLANK       95.0% - 100.0% improved pasture and
                                   forage crops
   P    1           75.0% -  94.9% improved pasture and
                                   forage crops
   P    2           50.0% -  74.9% improved pasture and
                                   forage crops

6. Narrative Description of CLI Land Use

   The Canada Land Inventory land use classification divided
   the land into 13 classes, based on air photo
   interpretation, field surveys, and census information.
   The land use information was originally compiled on maps
   at a scale of 1:50,000. This information was later
   generalized to a scale of 1:250,000 and land use classes
   were combined where necessary to facilitate the input of
   information to the computerized Geographic Information
   System. Only a handful of maps were selected for
   publication from that series of 1:250,000 maps.

   The land use information is valid only for the year in
   which the air photos were taken or the area was field
   checked. As evidenced on the few printed maps (Montreal,
   Truro,Woodstock,Winnipeg and Prince Edward Island), this
   date varies from 1950 to 1970. Moreover, the date for one
   map sheet can vary as it is made up of sixteen 1:50,000
   sub-components which themselves could have had variable
   dates. The average date of the inventory as a whole may
   be considered as 1966 but there is as yet no supportive
   evidence to this assumption. It may also be considered as
   1961 vintage based on the evidence that the 1961 census
   was utilized the separate cropland from improved pasture.

   Some of the stated limits of the classification include:

   . The mapping does not reveal the socioeconomic factors
     intimately related to use of the land, such as size of
     farm unit or type of land tenure.

   . The mapping does not reflect degrees of productivity
     within classes.

   .  The mapping does not reveal land capability.

   .  The last four categories (productive woodland,
      unproductive woodland, swamps-marsh-or-bog, and
      unproductive land) are not 'use' classes, but rather
      refer to vegetative cover.

   .  The separation of cropland and improved pasture was
      very difficult on air photos, particularly where field
      sizes were small. In most cases the ratio of cropland
      to improved pasture was determined from the 1961
      census. In areas where extensive field work was carried
      out, such as in Quebec, partial separation was done. In
      the Prairie Provinces these classes were mapped
      separately using air photos.

    .  The information has gone through two stages of
       generalization. First, the information was generalized
       during air photo interpretation to fit the
       classification and the minimum size requirements of
       the 1:50,000 maps. This information at the 1:50,000
       scale to fit the size requirements and the maximum
       of three land use classes per unit area for the
       1:250,000 map.

   The stated potential uses for these maps included:

    a) as an information document for regional planning; for
       this, it is best used along with the land capability
       map series produced by the Canada Land Inventory.

    b) as a historical document presenting the use of the
       land at a particular point in time.

    c) as an educational tool in schools and universities.


7. CLI Land Use Code Descriptions

   'B'  Built-up area. Land occupied by cities, towns, and
        villages, or by isolated units away from settlements
        such as manufacturing plants, rail yards, and
        military camps. Parks and other open spaces within
        built-up areas are also included.

   'E'  Mines, quarries, sand and gravel pits, open
        excavations. Land used in the past or present for
        the extraction of earth materials.

   '0'  Outdoor recreation - Land used for private or
        public outdoor recreational purposes. Some examples
        are: golf courses, parks, beaches, summer cottage
        areas, game preserves and historic sites.

   'H'  Horticulture, poultry and fur operations. Land used
        for intensive cultivation of vegetables and small
        fruits, includes market gardens, nurseries, flower
        and bulb farms and sod farms. Large scale commercial
        fur and poultry farms are also included because of
        their specialized agricultural nature.

   'G'  Orchards and vineyards. Land used for the production of
        tree fruits, hops and grapes.

   'A'  Cropland - Land used for annual field crops such as
        grain, oilseeds, sugar beets, tobacco, potatoes,
        field vegetables and canning crops. Associated
        fallow, and land being cleared for field crops are
        also included.

   'P'  Improved pasture and forage crops.- Land used for
        improved pasture or for the production of hay and
        other cultivated fodder crops, including land being
        cleared for these purposes.

   'K'  Rough grazing and range land. Areas of natural
        grasslands, sedges, herbaceous plants and abandoned
        farmland whether used for grazing or not. Bushes and
        trees may cover up to 25% of the area.
        Intermittently wet hay lands (sloughs or meadows)
        are included as long as the land is utilized. Within
        some grassy, open woodlands, bushes and trees may
        exceed 25% cover if the area is actively grazed and
        no other use dominates.

   'T'  Productive woodland.Wooded land with trees having
        over 25% canopy cover and being over 20 feet in
        height approximately. Artificially restocked areas,
        or plantations are included regardless of age. Much
        cut-over and burned-over land is included.

   'U'  Non-productive woodland. Land covered by scrub
        growth.

   'M'  Swamp, marsh, or bog. Open wetlands except those
        which frequently dry up or show evidence of grazing
        or hay cutting.

   'S'  Sand, sand bars, sand flats, dunes and beaches -
        Unproductive unconsolidated land which does not
        support vegetation.

   'L'  Rock and other unvegetated surfaces - rock barrens,
        badlands, alkaline flats, gravel bars, eroded river
        banks, mine dumps. Unproductive land which does
        not support vegetation.

For further information see "A Guide to the Classification
of Land Use For the Canada Inventory", January, 1968.

8. Accreditation

   The Canada Land Inventory extraction and distribution is
   managed by:

   The Canada Centre for Remote Sensing
   Natural Resources Canada
   Government of Canada
   Room 650 - 615 Booth Street
   Ottawa, ON, Canada
   K1A 0E9

   Based on significant research and development by:

   The National Archives of Canada
   Statistics Canada
   Agriculture and Agri-Food Canada

   Data processing completed by:

   Spatialanalysis,
   Ottawa, Ontario,
   Canada K1Y 0N3

   The National Archives of Canada retains
   intellectual property.

(Copyright) Her Majesty the Queen in Right of Canada, 1999.

