3. Pre-studies

3.1 Data collection

Data collection involves identifying existing documents, analyzing them and carrying out the following tasks:

• proposed layout, existing plans (1:25,000 site plan, 1:5,000 site plan, 1:2,000 cadastral plan), maps at various scales, etc. ;

• environmental study: description of current site conditions and photographs, landscape, climatological, hydraulic and hydrological analyses... ;

• situation with regard to current land use ;

• any easements ;

• specific studies, for example :

  • studies involving a diagnosis of an existing sewerage network to estimate :...