Fisheries and Land Resources

Map Numbering System

Standard

Digital data sets should be organized in the standard map sheet indexing system which is an extension of the National Topographic Series of maps.

Individual GIS applications may require specialized "windowing" of data sets, however, where possible the data set organization and labeling should follow the pattern set out in the following table.

Map
Scale
Map Label
Format
Example
Coverage
Latitude
Coverage
Longitude
1:250,000 DDDL 012M
1:50,000 DDDLDD 012B08 0° 15' 0° 30'
1:12,500 DDDLDDRC 012B0842 0° 03' 45" 0° 07' 30"
1:5,000 DDDLDD5RC 012B08594 0° 01' 30" 0° 03'
1:2,500 DDDLDDQRC 012B08236 0° 00' 45" 0° 01' 30"
1:1,250 DDDLDDRCRC 012B084273 0° 00' 22.5" 0° 00' 45"

¹ Explanation of the map label format

1:250,000 DDDL DDD=3 digit block numbers covering Canada,
Letters A-P for 16 cells
1:50,000 DDDLDD 16 cells within 1:250,000 map,
DD numbers 1-16
1:12,500 DDDLDDRC 16 cells within 1:50,000 map, Rows 1-4,
Columns 1-4 **
1:5,000 DDDLDD5RC 100 cells within 1:50,000 map, 5 always,
Rows 0-9, Columns 0-9 **
1:2,500 DDDLDDQRC 400 cells within 1:50,000 map, Quad. 1-4 *,
Rows 0-9, Columns 0-9 **
1:1,250 DDDLDDRCRC 100 cells within 1:12,500 map, Rows 0-9,
Columns 0-9 **
* Quadrant numbering: 1 for South-West
2 for South-East 3 4
3 for North-West
4 for North-East 1 2

** Rows are numbered from Bottom to Top,
Columns are numbered from Left to Right

Note:Provincial mapping produced prior to 1975 does not follow this numbering system.

 
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