Canadian Forestry Journal, March, 1919 



11 



How woodeil areas art- dcriiied by camera from 15.000 feet in the air. The strips of white and 

 grey in blocks represent cultivated land, the difference in shading being accounted for by various 

 crops, hay, grain, stooked and uncut fields, meadow, etc. 



Photos by kindness of Major MacLaurin, R.N.A.S. 



had maps on the country as it was before the 

 war, but the defensive works constructed on both 

 sides would have necessitated elaborate surveys 

 which, of course, it would have been rather dan- 

 gerous to attempt in the vicinity of the front 

 line trenches. By experience we learned to 

 know the appearance on a photograph of the 

 numerous defensive works in the enemy lines, 

 trench systems, machine gun emplacements, 

 trench mortar emplacements, gun pits, dug outs, 

 wire entanglements, telephone Imes, buried cable 

 lines, and many other constructions became 

 known to us, and the result was that our artillery 

 could deal with these things, and the Canadian 

 artillery have a decidedly efficient way of dealing 

 with things that are bothering their brothers-in- 

 arms, the infantry. 



The average height from which these photos 

 were taken was from 6,000 to 8,000 feet. Now, 

 if such accurate results could be obtained at 

 these heights how much more could be done 

 with photographs taken, say from 1,500 feet, 

 with nothing to ruffle the nerves of the opera- 

 tors? 



I understand that the Government may estab- 

 lish an aeroplane or hydroplane forest patrol 

 for fire ranging purposes. Why not have these 

 planes fitted with photographic outfits for the 

 purpose of mapping that part of the country of 

 which so little is known, the importance of it to 

 the lumber industry seems to me. although not 

 a lumberman, to be too great to be overlooked, 

 I have found an idea of how this work might be 

 done for the lumber companies. 



How to "Snap" Forests. 



They might make arrangements with the Gov- 

 ernment to have their own limits photographed, 

 merely paying rent for the machine while on 

 their work, and the cost of the photographs, ap- 

 proximately $4.00 per dozen. This would cut 

 out the necessity for havmg machines, operators, 

 and cameras of their own. 



First of all, take the limbered area which 

 carries a variety of trees, it need only be a 

 small area. Have it accurately cruised, or 

 better still, have a survey made of this one small 

 area and have species of trees given and also 

 condition of ground as to rock, outcropping, etc. 



