excluded from photogrammetric work, and for which existing
maps will be updated, or regions assigned for direct surve
ying /e*g* forest /• This analysis establish technical con
ditions for further work / point 3/*
According to technical conditions making up guidelines
for the flight plan, the following data are included :
the type of camera /format, focal length/, over lapping,
scale of photos and sometimes the directions of flights*
The most oftenly used camera is the RG 10, having a 23x
23 format, focal length 150 mm, 60$ lengthwise overlap and
30$ crosswise overlap*
The scales of photos are as follows j
for map scale 1:500 - photo scales 1:2500 - 1:3500
1:1000 1:4000 - 1:5000
1:2000 1:7500 - 1:9000
These guidelines, along with the topographic map, on
which the borders of the object are marked, are included
to the order for photography and sent to PPGK-War 3 aw, the
institution which takes aerial- photographs* PPGK-Warsaw
make then a project of the photogrammetric flight and sends
a copy of it to Krakow, which carries out the project of
targetting of control points, which are used for aerotrian-
gulation / point 5 /• In this 3tage of work, the object is
subdivided into block which occupy 80-100 models*
The ground control points are distributed in the follo
wing manner' :
- on the borders of a block :
- paralell to the axis of the flight every
3-4 bases,
- perpendicular to the axis of the flight in
each strips on the block border,
- in the interior of block - every second strip and every
fifth base*
The above mentioned work is performed by the design and
aerotriangulation group*
Control point targeting regions appear on the topogra
phic map along with plotted axes of individual strips and
borders of blocks*
This map is then handed over to geodetic and photogram
metric survey groups who survey the geodetic network, for
designated photogrammetric control points as well as for in
dispensable basic points of reference to supplemertary mea
surements / point 6 /•
Next the group carries out in the terrain the stabilize
tion, targeting and basic measurements / points 7 and 9 /•
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