NTS Grid

The NTS grid covers all of Canada, but it is only used for oil and gas mapping in British Columbia, outside of the Peace River block.

You specify NTS coordinates using a Primary Block (map number), Lettered Quadrangle (letter), Sixteenth (portion), and Block.

Primary Block - Represents areas that are 4 degrees from north-to-south and 8 degrees from east-to-west. In BC, primary quadrangles are numbered from 82-to-114, but most of the active oil and gas occurs in primary quadrangles 93 and 94.
Lettered Quadrangles - Represents areas that are 1/16 of a primary quadrangle. These are lettered from A-to-P, in a left-to-right/right-to-left pattern, starting at the southeast corner of the primary quadrangle.
Sixteenth - Also called portions, this represents areas that are 15 minutes-by-30 minutes in size, or 1/16 of a lettered quadrangle. They are numbered from 1-to-16, in a left-to-right/right-to-left pattern.
Block - Each Sixteenth (portion) is divided into 12 blocks that are 5 minutes wide-by-7.5 minutes high. Blocks are lettered from A-to-L, in a right-to-left/left-to-right pattern. Each block is divided into 100 units that are 30 seconds wide-by-45 seconds high and numbered from 1-to-100.

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