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The requirements for stereometric cameras are as follow:
1/ possibility of setting-up camera axle in various tilts /hori
zontal, vertical, tilted up or tilted- down/«
2/ possibility of set-up of base-tube in vertical position
3/ possibility of changing of the lenght of base
4/ possibility of optional orientation in relation to any referen
ce coordinate system
5/ remote shutter release
6/ light weight*
Some parameters of most popular stereometric cameras are listed
in table 2.
The conditions 1,2,5 are fulfiled by few stereometric cameras#
None of the known cameras has an device for exact horizontal
camera scientation SMK-40 and 3&K-120 are equiped with special
alignment mirror, which allows on base set-up# parallel to the
object plane# This device is useful only in the case, when the
façade has a visibly horizontal line# Base lenght can be changed
only in the new Wild P3A32 stereometric camera#
The majority of stereometric cameras are in our opinion too heavy
and are useful for taking photographs from ground stations only#
Let*s consider now instrumentation necessary for the office work#
In 51 it was pointed out that we are using in architectural
photogrammetry three forms of presentation results: graphical,
photographical and numerical# For graphical presentation the basic
instrument is plotter# For architectural purposes the following
requirements should be met by the plotters:
1 - wide range of setting-up the principal distance,
2 - large scope /interval/ of Y - movement /in direction of
camera axis/, -
3 - possibility of setting-up short base value /b4^ Q Y/,
4 - plotting possibility for tilted photographs /for instance 30°
or 60°/,
5 - plotting possibility in different planes: XY, XZ,YZ and
easy connection between plotter and coordinatograph,
6 - possibility of setting-up all orientation^elements /relative
and absolute i#e# X’ , X* , , ?*’ , co f oS , by, bz/# When
photographs are taken from higher stations - without man
control, above mentioned possibility is necessary#
Universal plotters /comparatively expensive/ satisfy conditions
1»2,3,5,6# Requirement 4 is fulfiled only by a special construc
tion of the autograph /Stereoplanigraph, Verostat, Stereosimplex
II/c/ or by an additional adapter to the plotter which allows
for plotting from tilted fixed photographs /UBR-Opton, tilt-
calculator Zeiss-Jena/# For architectural photogrammetry
plotters with simplyfied constru ction which are constructed
for terrestrial photographs can be useful* But these autographs
need photographs with known and particularly set elements of
the outer orientation. Table 3 show’s main parameters of the
plotters, which can be used to architectural photogrammetry#
Comparing the requirements with the possibilities one can state
that available plotters are suitable for plotting from all simple
cases of photographs#