2 
The present task of the Land Survey could be stated schematically in 
the following way, 
a) Planning of the land use for agricultural, forestry and urban 
purposes. 
b) Division, amalgamation and interchange of land, and determina 
tion of boundaries of landed estate by means of legal procedures, and 
land registry. 
c) Surveying and mapping for the accomplishing of the tasks a) and 
b) but also preparing of descriptions, reports and minutes concerning 
the technical, economical and legal aspects of the case, finally also sto 
ring of the maps and documents in public archives in order to make 
legal rights safe for the future. 
The Land Survey is managed by the Land Survey Board in Stock 
holm, which also supervises the surveying in towns, certain local go 
vernment units and some urban areas. In every of the 24 provinces of 
Sweden there is a province surveyor, who is responsible for the land 
registry and the great archives of maps and documents. The number of 
maps in those archives is at present about 1.000.000. The executing in 
stitutions of the Land Survey are 185 organization units, distributed all 
over Sweden, each of them managed by a district surveyor or a sur 
veyor at disposal. The Central Office is also an executive institution, 
located to Stockholm. It is an organization for technical service, espe 
cially concerning photogrammetry. 
An essential part of the tasks of the Land Survey is of technical na 
ture, especially compiling maps. The need of maps for urban planning 
increased considerabely at the end of the 1940ies and therefore it was 
necessary rapidly to try to rationalize the mapping work. Photogram- 
metric methods of mapping at the scales of 1:800, 1:1 000 and 1:2 000 
for urban planning therefore were tested for some years. Successively 
a method was developped at the Central Office, which proved to be well 
capable of being used. In connection with this work the accuracy of 
stereoscopic plotting in different stereoautographs was studied. In 
doing so the dependence between negative scale and plotting accuracy 
was obtained. Also Ihe costs of separate operations of work from a 
number of geodetic and photogrammetric mappings at the scale of 
1:2 000 were studied. From these investigations was evident that pho 
togrammetric methods had a satisfying accuracy but also that photo 
grammetric mapping for urban planning, at the scale mentioned, could 
be performed 20—30 % cheaper than the corresponding geodetic map 
ping. In general the photogrammetric methods were also more rapid 
and required less working-power and field work. During the years 
1948—1955 the Central Office prepared maps for urban planning at 
the scales of 1:800, 1:1 000 and 1:2 000, covering together about 44 000 
hectares. That mapping activity is still going on.