Continuation: TABLE N° 2 
TRIANGULATED STRIPS WITH THE INSTRUMENTAL METHOD 
  
bo 
r2 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
| 
| Bridging 
Survey Flight | Ground control points TT Adjustment of strips Reached precision 
purpose | Plotting instruments Bridging characteristics | 
| 
Country Organization may scale | | | M | | Sr ; | r Tr | | | 
o Photo- | Camera Flight Overlap | Auxiliary| Ground Total. | Position of | Plotting Preli- Thermal Operators s Relative AU Time | N° of ann of | Use of data, Use Use of | | Mean errors 
total area | Cameras | graphic | calibra- altitude Photo ang | equip- |character- number control points Type instru- minary istics and | Bridging absolute from required | repe- | B. refraction | Planimetry Altimetry | from | of A other Tests 
| material tion and | scale strip | ments | istics for in the strip | ments tests of | working method orientation auxiliary | for model | titions | C. film | auxiliary | electronic | equip- | x zZ 
| | direction length | | strips | | | rooms | shifts of models lequipments | shrinkage lequipments| computers | ment | y 
| | | | : | = | : | | | | 
| | | | | | | | | | | | | 
SOUTH AFRICA |R.C. 5 film | Byfaetory E-W 150 km | |First model fully |A. 5 |Grid test |1 shift 2-3 models| | By planetrans-|Vertical: by | | | 
| RCs | |controlled, pair of [A. 7 | per day formation and |graphical | | | 
| IRC 5 A.| controls every 5th an adjustment|means of plot-| | 
| William- | land 7th model. |plotted curve |ting from a pa- | | | 
son 0.8, | | | | e | jrabolic curve | | | 
SPAIN IR.M.K. 21 |film 4.000 -  |1:20.000 |60 | | |5controlpoints at |A. 7 Adjust -| |2 operat. | Optical mechani- A. By com-|Analytical graphical method | | | 
| |normal | 5.000 m 11:30.000 |20 km! | both the ends of the| IA. 8 ment of |2 shifts cal method and] pensating |Zarzycki’s method | | | 
| | Fairchild| la. g. {8 models | | Istrip. 3 control| S. IV zero posit-| Von-Gruber's plates : > | | | 
| |f = 15,2 | | | | [points in the middle C. 8 lion |method | | | 
SWEDEN | The Geographi- |3.600 models R.M.K. | film Determi-|4.000 - | |Forofficial mapping| The level|Multiplex|Grid test ‘Conventional, 1 hour C. By f varia-|Single strip triangulation is | | yes | Precision is endeavoured to obtain 
| cal Survey office Iformiddleand 15/23 | ned with|4.500 m | | |the density of gro-|points are|Balplex empirical method tion lusually adjusted to the con- | | | | the results with sufficient accuracy. 
small scale laboratory | | | |und planimetrycon-|seldom de-| trol points by ordinary simi- | | | | In the Multiplex and Balplex the er- 
(method. trol points varies|termined| |A. Corrections larity transformation. | | | | ror is + 0,5 mm on the mapping 
| ) | |The me- | between 3,5 and 0,5/by baro-| _ 2 areintrodu-| Triangulation in the Multiplex | | | scale 
| | | |thod has | | points per 100 km*. | metric le-|A. 7 Indipendent 2.5 hours eed in the|and Balplex is treated with | | | 
| 1600 models|William- | been cheoe-| | The number of ele- ivelling A. 5 model trian-| diapositive|graphical methods | 
| for special|son Eagle| Iked  with|10.000 m | | | vation control po-|(Northen gulation ac- printings or| | 
| ‚purposes IIX | test from | | ints per model u-|Sweden) (cording to in projec-| 
| the height| | | [sually amounts to 4 | Ekelund tors of the| 
| of the ice | | | instruments 
| | | fields. | | A. T idem 2,5 hours | | 
12.150 models|R.C. 5 A. 1.500 - | | A. 8 | 
| | for large scale | 15.000 m | L | | Ce C. 5 : | : | | | | 
The Central Office|1.100 km? | | [1 : 7.000 | | | 4 elevation points A. 7 |Indipendent/Each individual| | | | The individual| | 
of the Land Sur-|340 models| i : 65.000 |! each model A. 8 |model trian- | model is levelled| | | |model systems) no yes | 
vey Board Cadastral] | | |gulation |with the aid of | | |are connected | 
|map | | | elevation points. | (to each other| 
  
  
  
  
|The scale is tran-| 
|sferred to adja- | | 
(cent models from| | 
lelevation measu-| | | 
|rements (A. 7) or| | 
land to availa- 
|ble control | 
point with the| | 
aid of similari-| 
ty transforma-| 
| 
| 
ment is perfor- | 
{med in connec- | 
tion with the 
transformation. | 
For a larger 
(number of ste-| 
reomodels the| 
individual mo-| 
| dels are usually 
(connected in| 
groups of four 
and four which | 
then are con- 
nected to each 
lother by com-| 
mon computa- | 
tion of the 
transformation 
coefficients 
from the mu- 
tual connection | 
of the indivi-| 
dual groups 
and with thiel 
laid of available 
control points. 
  
  
  
  
  
| |from distances| tions. For a 
| | (A. 8) few stereomo-| | 
| dels the adjust- | |