. Canadian forestry journal. Forests and forestry -- Canada Periodicals. 1^ ^^^-^^ ^. In prefacing- this article, it may be stated tliat the following method of map sqtiarini^ has been adopted by the Forestry Branch, Provincial Government, Quebec, Forest Fire Protection Associa- tions, Quebec, and several large paper and lumber companies who operate aerial surveys and fire patrols of their respect- ive timber limits. Maps to be used are standard topo- graphical maps, scale or miles to 1 inch. These maps can be obtained from the Departmeht of Interior at Ot- tawa, and are published i
. Canadian forestry journal. Forests and forestry -- Canada Periodicals. 1^ ^^^-^^ ^. In prefacing- this article, it may be stated tliat the following method of map sqtiarini^ has been adopted by the Forestry Branch, Provincial Government, Quebec, Forest Fire Protection Associa- tions, Quebec, and several large paper and lumber companies who operate aerial surveys and fire patrols of their respect- ive timber limits. Maps to be used are standard topo- graphical maps, scale or miles to 1 inch. These maps can be obtained from the Departmeht of Interior at Ot- tawa, and are published in sheets, which can, of course, be joined up to make one large map of any given territory, and each sheet is given a distinctive refer- ence number. Key to these sheet ntini- bers can also, be obtained at Ottawa. To proceed with the actual squaring of these each sheet is divided into 9 squares, every degree of lati- ed into 9 squares, every degree of lati- tude and longitude forming a square, and numbered from top left-hand corner 1 to 9. Each of these 9 squares is sub- divided into 6 squares, which are lettered "A" to "F"; the sheet is now divide! into a total of 54 squares. Proceeding along the same lines, in the process of reduction, each of the squares lettered "A" to "F" is divided into 36 squares, and numbered from top left-hand corner 1 to 36. Again, using the same method of reduction, the last mentioned squares are divided into 4 and lettered a. b. c. d. in small letters. The final reduction of squares is arrived at by dividing eacli of the latter squares a. b. c. d. into 10,, ,l)ut as die squares are not very small, graduations of lOths are placed on two sides of the squares, these graduations serving as a scale or protractor applicable to any square. It is just a matter of measuring latitudin- ally and longitudinally to any given. Please note that these images are extracted from scanned page images that may have been digitally e
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