15 3) 9 <P 11 Combine Ila with the left side of la until the line PR, then with lib; if <p (J; combine lib with Ilia etc. 4) ii 9 in—4 Select the corresponding direction in the figure. Its number must be in scale Ila. The numbers of these two directions differ by 5 or a multiple of it. All factors where i />.5>iJj>w+i p. 5 are zero. E.g. of the row 14,^ all cofactors 14,15 are zero and 14,6 is given by 9,1. 5) in4 Combine the left part of Illb with lie, and then with lb, IVc and the right part of 11 lbAll cofactors in which in10 <>\i> \n -f-11 are zero. 6) To obtain the real value of the cofactors the given numbers have to be divided by 48. E.g. In a chain of 5 quadrilaterals n= 52. The row r9 e9, R eA becomes R <P 7) r1B e1B, yt -(- e^ r6 e6, R -\- e^\ A 1 1 1 1 1 i\ 1 1 1 1 1 9 1 1 1 n - a 1 n - Q Fig- 5

Digitale Tijdschriftenarchief Stichting De Hollandse Cirkel en Geo Informatie Nederland

Tijdschrift voor Kadaster en Landmeetkunde (KenL) | 1957 | | pagina 23