Data compilation:

Data compilation is required to merge data from pre-existing surveys. Preliminary transformations are first required in order to bring each data set in a unique and coherent system. These processings include :

• Transformation of the projection coordinates
• Data transformations (re-sampling, controled upward or downward continuations, etc )
• Merging of the coherent grids
• Mapping
• etc

 Special algorithms have been developped to perform a perfect continuity between the profiles. The final data are delivery in a data base suitable for the client.