combined (with the overlap border turned back) to form general view 
mosaics. 
The total forest area of the company amounts to about 4300 sq. km, 
divided into 11 forest districts in charge of about 80 forest rangers. Photo 
material is being distributed to 4 of the distriets. Besides pocket stereo- 
scope (Simonsson’s patent), boxes, cases ete, each forester is to be 
furnished with 
e 
set mounted contact photo prints, scale 1: 20 000 
N 
sets photo maps, 1: 10 000, one cut and pasted on cloth 
N 
sets economic maps, 1: 10 000 
set general topographie maps with flight strips marked, 1: 100 000. 
— 
Forest rangers receive similar equipment, but so far only 1 set photo 
maps and economic maps, both on cloth. The chief forester's office has 
the same, together with spare copies. 
With this mapping method the cost for photo material and the like has 
varied between about 0.20 crown and 0.60 crown per hectare of the areas 
comprised in the work. As the company's holdings amounted to half the 
area, the cost to the company was about double per hectare. In addition 
there is a considerable cost difficult to estimate for investigation of 
boundary lines, drawing on the photos etc. executed by the company's 
personnel, sometimes in conjunction with other duties. 
Summary 
As may be seen from the foregoing, there are pronounced similarities 
and dissimilarities in the new mapping methods. Some of the more im- 
portant aspects may be summed up in the following. 
1. The major problem of forest mapping in Sweden at present is whether 
the new maps are to be drawn maps or aerial photos. The majority of the 
new mapping methods apply the photo as an end product; the photos are 
only supplemented to a small extent by the addition of drawing. The other 
type with the drawn map as final product is represented by the State 
Forest Service. Nevertheless, the photo is employed in the production 
process and the photos are finding ever increasing employment side by 
side with the drawn maps and as temporary substitute for obsolete maps. 
An intermediate method is that used by Kopparfors AB, in which drawn 
maps and photo maps are prepared simultaneously. The forest personnel 
has in this case, as in the State Forest Service and some of the other forest 
administrations, the opportunity to use drawn maps and photo maps at 
the same time. Experience is still too short in most places and the methods 
of applying the maps differ so much that it is not possible to draw any 
definite conclusions. A brief statement of different points of view and the 
experience so far gained may give some indication, however. 
Drawn maps are often preferred: 
a) if there are existing forest maps of good quality 
b) if all units must be examined in the field anyhow, e.g. for stand 
description or cruising of standing stock 
c) if the personnel is moved about rather often, and is used to drawn 
maps, but lacking in experience of the use of photos 
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