elevations and depressions are represented conventionally by means of 
hatchings, these being sketched on the basis of the contour map, however. 
The technical procedure is briefly as follows. Transfer of map details 
from contact photo prints to copies of the photo map has been done by 
hand and by Multiscope. From these copies suitable details are transferred 
in turn to the drawing film (the stand boundaries being transferred later, 
however) by manual copying. Copies are made of the drawing film. One 
of the film copies is supplemented by the transfer of contour lines, after 
which the details of the film copies are processed on 3 further copies of 
the photo map. These will now represent the original photo, plus (in 
white) the forest details and names of places etc. — but not the stand 
boundaries. The other copy .of drawing film is provided with stand 
boundaries and contour hatchings and then processed in 2 copies on draw- 
ing paper, after which they are furnished with the usual color designa- 
tions. The photo maps and the drawn maps are cut to the size of 2575«25 
cm and pasted on cloth. The personnel is supplied with stereoscopes and 
map holders. 
The principal use of the photo map, scale 1: 10 000, is for general view, 
orientation and planning. The drawn map, 1:10 000, is mostly used for 
the recording of projects executed and as an aid in the interpretation of 
aerial photos. Contact photo prints, scale 1: 20 000, are employed for 
certain studies when planning, but the personnel has not yet acquired the 
training necessary for utilization of the photos. Both foresters and rangers 
are supplied with copies. 
The area mapped is about 900 sq. km, which represents 3/5 of the area 
of photo coverage for this particular project. Despite the varied utility of 
the map material thus obtained, the cost for 1955 amounted to only about 
0.70 crown per hectare of mapped area. Of this total, 0.25 crown went for 
sketching on contact prints and the transfer to photo map. 
Korsnäs AB 
The forests mapped presently are situated in southern Norrland and 
possess good productive capacity. Here, too, the forest management is 
based on a system of large units. The existing map material was prepared 
some 20 to 30 vears ago. It was not until 1953 that the company put in 
hand a new mapping project, with the benefit of the experience gained by 
the companies referred to above. On the basis of these and its own in- 
vestigations, the company arrived at a new method, the principal features 
of which are described below. 
1. Aerial photos. Aerial photos are considered more useful in this com- 
pany's forests than drawn maps supplemented by descriptions of the stands. 
2. Contact photo prints. Contact prints speedily and inexpensively pro- 
duced, scale approximately 1:20 000, with overlap for stereo-vision, have 
in general been found adequate as photo material. À condition is, however, 
that the prints should be of the best quality at present obtainable, as recent 
as possible, not older than 5 to 10 years, and that the photos were taken 
in spring or autumn, when hardwoods can be distinguished from conifers 
on panchromatic (or orthochromatic) films. 
3. Presentation of the photo material. The photos find their most im- 
portant application in everyday use in the field. In view of this the prints 
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