2.1 Ground Control 
2.1.1. The Control of Distribution, Signalization 
and Shapes of Ground Points. 
Before taking aerial photographs, we have checked 
first, the distribution, signalization and the 
shapes of ground points, whether they were 
suitable to the technical specifications or not. 
The contractor was informed of the missing or the 
corrupted points. 
2.1.2. The Control of Geometric Accuarcy of Ground 
Control Points  (GCP) and Height Control 
Points. 
There were 1500 GCP and 1200 Height Control Points 
in the Whole area, /3/. In order to check the 
triangulation chain network and levelling network, 
electronic theodolites, Wild T.2000 with D15-GRE 
3, data recorder and Zeiss Ni-2 levelling 
instruments had been used. Checking has been done 
by sampling method in which 10 $ of the GCP had 
been verified. At the end of calculations, 
position error of full ground control was found as 
mp- + 5.7. cm. and max. position error was found 
as m = + 8.7 cm. For the height control, 
p (max) 
according to the test measurements, mean square 
error was my= + 1,2 cm. and max. height error was 
Mh = + 3 cm. As a result, it is easily said 
that, all ground control measurements and 
calculations were suitable to the technical 
specifications, and we confirmed them. 
2.2. Control of Aerial Photographs 
Aerial photographs were taken using a Zeiss RMK 
camera with a Forward Motion Compensation system, 
/3/. After developing the films paper prints of 
these photographs had been taken. From these 
prints and also from original films, following 
points have been taken into account in order to 
the detect whether they are suitable to the 
technical specifition or not. 
. Forword and lateral overlap percentages, 
. Quality of aerial photographs, 
. And other conditions on the technical 
specification. 
2.3. Control of Aerial Triangulation 
Before starting aerial triangulation, we have 
controlled the calibrations of Inter Map Analytic 
(IMA) Instruments as well. Since these instruments 
as a comparator for aerial triangulation 
mesurements. For aerial triangulation  adjusment, 
the PAT-MR (PC-Version), "Block Adjustment with 
Independent Models" program has been used, /3/. 
Each block was adjusted separately. International 
tests have been applied to each block. Sigma 
naught values which are very important because of 
block stability were found to be approximately 5 
micrometers for planimetry and 9 micrometers for 
altimetry for each block. On the other hand we 
also made some tests, such as, decreasing the 
number of GCP, namely i-4b for planimetry and i-8b 
for altimetry. We found that, there was no 
significant change on the sigma naught values 
either for planimetry or for altimetry. This 
shows that, aerial trangulation measurements and 
calculations were good enough. According to us, 
these results were sufficiently accurate for large 
scale digital map production. 
3. CONTROL OF DIGITAL PHOTOGRAMMETRIC MAPS 
(SHEETS) 
In the Figure-2,sheet control flow-chart is shown: 
  
INPUT DATA FOR CONTROL N 
(Digital, Photographic and Drawn Data) 
\ 
3.1. PHOTOGRAMMETRIC CONTROL 
(On the IMA instrument) 
. Orientation 
. Completness 
. Correctness 
  
  
  
  
  
3.2. CARTOGRAPHIC CONTROL 
(On the workstation) 
. Cartographic standards 
. Completness, photo/sheet 
. Cartographic Correctness 
i 
3.3. GEODETIC CONTROL 
(Control on the field by using, total 
station + workstation instruments) 
  
  
  
  
  
  
  
3.4. ANALYSIS AND EVALUATION 
Y 
3.5. OUTPUT DATA FOR CONTROL 
(Digital, Drawing, Verbal) 
  
  
  
  
Figure 2: Sheet Control Flow-Chart 
3.1. Photogrammetric Control 
Photogrammetric control was performed on the 10 $ 
of the models (sheets), choosen by sampling method 
on the IMA instrument. For this purpose 
diapositives of these models have been oriented on 
the IMA. After making inner orientation, results 
of relative orientation and absolute orientation 
have been checked. By means of superimposition, 
PLN-file, TOP-file DTM-file, and beside these, 
completness and correctness of the photogrammetric 
evaluation have been verified. If there were some 
missing points, they were pointed out and the 
contractor was asked to complete them. 
3.2. Cartographic Control 
For cartographic control, 2 Intergraph 32 C 
Workstation and Vax tarminals and a drum plotter 
have been used. As software, IGDS and ICS have 
been used. The completness, correctness and the 
quality of cartographic data have been verified by 
PLN-TOP-DTM files. By means of MFC.TBL attiributes 
of graphic data have been checked. Such as: 
. Symbology 
. Coincidence 
. Pattern error 
  
. Ver 
. Pos 
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