Sweden 9
Fig. 2. The Land Survey Organization.
The Central Office is directly conducted by the Land Survey Board
and does mainly technical work, especially map making in stereoscopic
instruments.
The Geographical Survey Office is in charge of the. flying and pho
tographic work requested by the Rural Survey Organizations. The Cen
tral Office makes plans of the flights, signals and ground control net
work and also works in the stereoscopic instruments. The District Of fi
ces investigate the properties, reconnoitre and mark the geodetic and
photogrammetric control points, put out the signals at the control and
boundary points, do the geodetic field work and computations, the
checking of all the photos taken, and also the editing and final drawing
of the maps.
The Photogrammetric Instruments and Methods used by the Rural
Survey Organizations. The equipment of the Central Office includes
the following stereoscopic instruments:
1 Wild Autograph A 5
1 Wild Autograph A 6
1 Wild Autograph A 8
1 Zeiss Stereotop