Abstract:

Location of crossover points of surveying tracks have been determined by simulation quadratic equation method, geodetic coordinate method or direct method. According to the simulation quadratic equation and geodetic coordinate method, location of crossover points have been determined by two steps: step one, determine the approximate coordinates and step two, determine accurate coordinates. The direct method can determine directly accurate location of crossover points without approximate coordinate of crossover points. In the East Sea area, we can tranfer role of longtitude and latitude together in simulation quadratic equation method. The computation results are then compared to accurate results and together. According to the paper, the simulation quadratic equation method is the best method, the greatest accuracy and the fastest speed; the geodetic coordinate method determine approximate coordinates is high eccentricities, need efficient algorithm to determine four nearly points high accuracy; the direct method have the best result but this method is the slowest speed when data have large quantity