DIAGRAM 
Equivalent Systems 
x Am 5 points per 1000 
  
  
  
  
x 
m . 
olerance 99.7 £ 3 x Standard Error = Equidistance 
99.9 % 2 x Standard Error 
86.6 % 1/2 x Equidistance 
68.3 % 1 x Standard Error 
Probabilitv 
  
Fig. 6.2: 1. 
  
6.2 Conclusions 
The object of this study is to stress the need of a clear »»international 
standardization» of the accuracy of any photogrammetric product. With 
the values of both methods brought into equivalency such a clarification 
is possible [see fig. 6.2: 1]. 
Perhaps it seems unrealistic to use the c-factor for a map without any 
contour lines as well as for photogrammetric measurements in general, 
even though a calculated equidistance represents the top level tolerance. 
Under all circumstances, any mapping photogrammetrically carried out 
should have an annotation with all necessary quality data. 
References: 
[1] Toscano, R.: Teoría de los Errores. Segunda edición. México D. F. 1943. 
[2] Sanchez, P. C.: Cálculo de Probabilidades y Teoría de los Errores. México 
D. F. 1947. 
[3] Schwidefsky, K.: Fotogrammetría Terrestre y Aérea. Barcelona 1960. 
[4] Tham, P.: Secretaría de Recursos Hidráulicos. Departamento de Fotogram- 
metría. Proposición de Organización. México D. F. Report to the United 
Nations, New York. Mexico 1966. 
[5] Hallert, B.: Elementir felteori for matningar. Stockholm 1967. 
172 
DN. BOKTR. A-B 1968