v 
Fig. 3. Some localities where aerial photos have been 
used for mapping purposes. 
1 N State Forest Service (different parts of Northern 
Sweden). 
1S State Forest Service (different parts of Southern 
Sweden). 
Svenska Cellulosa AB, district Munksund. 
i 
A 
= 
  
2S Svenska Cellulosa AB, district Sundsvall. 
   
Od S/ockholm 3 | Mo och Domsjó AB. 
4 Kopparfors AD. 
5 Korsnäs AB. 
finished with lettering of names and altitude figures for the more im- 
portant lakes, hills etc., besides which indistinct trails, haul roads, streams 
elc. were marked. In addition, all property boundary lines were marked 
on the mosaics. This last work was troublesome and tedious and had to 
be done by a special personnel, both indoors and in the field. 
Lettering and drawing on the photos was done partly by hand, using 
white Indian ink, but more usually by photographic method producing 
the same white tone. The mosaic on scale 1: 20 000 was also reproduced to 
scale 1:50 000, intended to provide a general view. Both foresters and 
rangers were supplied with two sets of mosaics, one on each scale, one loose 
and other fitted in a cover. Photos on scale 1: 10 000 are considered to be 
awkward to view and look after, so that this scale has been used only for 
a small region. For the record of land reclamation projects, some large scale 
enlargements to scale 1: 5 000 have been employed. All employees, in order 
to keep check on the photos, have general topographie maps of the region 
on the scale 1: 100 000 or 1: 200 000, these serving as index maps for flight 
strips and photos taken. 
Roughly, the maps will be used by a forester in the following way: 
I. A general view can be obtained by using one of the two mosaics, 
besides which general topographie maps may be used. 
2. Orientation in the forest with the aid of contact prints. 
3. A draft of a project is based in the first place on general view maps 
with subsequent detailed studies of contact prints by means of stereo- 
scope and magnifying glass. As a rule there must also be an examina- 
tion in the field. Drait of project is sketched on a plastic film, which 
is placed on the photos.