The objectives of protecting and restoring biodiversity are based on the identification of areas forming the green and blue grid defined by II and III of article L. 371-1 of the Environment Code and specified by article R. 371-19 of the same code.
They are determined in particular by an analysis of regional issues relating to the preservation and restoration to good condition of ecological continuities, which are prioritised and spatialised.
The objectives of preservation or restoration to good condition are specified for each of the sub-strata listed by article R. 371-27 of the Environment Code.