The Lys Yser Establishment Is Launching A Consultation For The Carrying Out Of Soil Surveys For Integration Into The Study Aimed At Revising The Wetland Mapping Of The Lys Sage. The Objectives Of This Contract Are Therefore To Size The Soil Survey Campaign Over Approximately 500 Ha Spread Over The Lys Watershed, To Carry Out The Various Soil Surveys, To Integrate The Results Obtained On Gwern, And Possibly To Plan The Switch To The New Platform Of The Lys Forum Des Marais Atlantique, Plumh, And Transmit Them In The Correct Format To The Service Provider Of The Study Aimed At Revising The Wetland Mapping Of The Lys Sage.