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Software development & validation for Geodetic Datum Transformations
Results
The work in Hungary involved a huge database of 1150 points surveyed all over the country, with modern GPS instruments and Terrestrial Geodetic techniques, the later being collected painstakingly over the years. The coordinates of some points at the international borders, which were measured with respect to the GPS instruments and transformed approximately into the local coordinates, were falling into the neighboring country. So it called for a program which could accurately measure the seven Transformation parameters and hence the coordinates in the local datum too, given the GPS coordinates of the point of interest. Since the database is confidential, only the sample results are given here.
| Sample database of Points |
| Point |
GPS coordinates |
| |
X |
Y |
Z |
| Pili |
4082873.474 |
1454082.764 |
4664021.508 |
| Penc |
4052392.820 |
1417750.672 |
4701415.990 |
| Tisz |
4052457.444 |
1518221.640 |
4669885.105 |
| Point |
Local coordinates |
| |
X |
Y |
Z |
| Pili |
4082870.524 |
1454084.764 |
4664020.878 |
| Penc |
4052388.355 |
1417749.104 |
4701410.778 |
| Tisz |
4052453.964 |
1518220.270 |
4669888.242 |
The results given by the program were very accurate which were tested by giving one of the same points as the input, and the output was as expected, with a difference of few centimeters.
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