Brussels-Capital Region : entity "Green Block" (or green area) identifies ROW floor of approval vegetated areas (lawn, trees, possibly planted with flowers and ornamental trees and bushes, and often lined ponds and paths). Green areas have been designed on the basis of various plans (photogrammetric surveys, detailed maps, maps of towns, ...). They have a heterogeneous precision because of the diversity of origin. The entity "Green Block" (or green area) is represented using three different types: - GB-A: grassed (some grassy berm plants or trees) bands; - GB-B: parks (water parks located in these areas are not excluded); - GB-F: forests or wood (islets of the Sonian Forest located in the Brussels Region).