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Townships in relation with meridians, baselines and correction lines. Below is a brief description of how to lay out the DLS grid for Alberta. [3] [4] Lay off 6-mile-3-chain (9.7 km) ticks from the 49th parallel of latitude to the 60th parallel. This gives 127 township lines. The 49th parallel of latitude is the first
Range roads are commonly numbered in 1-mile (1.6 km) increments west from the east range line of a given township. The range roads form the east and west boundaries (known as section lines) of the 1 mile × 1 mile square sections – 36 of which comprise a township (e.g. Range Road 12-2 is between the second and third sections west of Range line 12, Range Road 6-0 is on range line 6).
Not all National Topographic System maps strictly follow the National Tiling System's linear grid. Some maps also, as an "overedge", cover land in an area which would otherwise be covered by an adjacent map sheet, simply because the latter area does not contain enough land in Canada to warrant a separate printing. [4] [clarification needed]
Townships in relation to meridians, baselines and correction lines. During the 1870s, the Dominion Land Survey had parceled much of western Canada into nearly square townships, which are approximately 6 mi (9.7 km) in both the north–south and east–west extents. Townships are designated by their "township number" and "range number", for ...
Halfway between two base lines, wider-than-nominal townships abut narrower-than-nominal townships. The east and west boundaries of these townships therefore do not align, and north–south roads that follow the survey system have to jog to the east or west. These east–west lines halfway between baselines are called "correction lines". [10]
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The largest grid has blocks of 20 by 20 degrees (9 rows and 18 columns), and is divided in 20 by 20 subblocks up to four times. From that level onwards, division is in 5 by 4 subblocks. The table shows the various block sizes at their maximum near the equator. The block width decreases with distance from the equator.
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related to: grid line maps for driving distance calculator between addresses canada