Study of the geometry influence of the support points in coordonates transformation: application from WGS84 to NS59 datum

The use of a transformation method for the passage from one geodetic system to another requires some common points as support points, these are used in determination parameters. Generally, choice is effected manually by choosing best distribution area. In present study, we methodology selection where an algorithm takes into account computation parameters with all combinations between and result will be adopted. An application this carried out North-East Algeria determine set 09 WGS84 National North Sahara using 10 (05 05 control). This efficient case near another.