Contours sound zones industrial noise

These are two files with sound contours (50 and 55 dB(A)) and the terrain limit of the zoned (part) of the industrial estate. The 50 dB(A) contour forms the outer boundary of the sound zone. The terrain limit is the inner boundary of the sound zone. PLEASE NOTE: the land border does not always have to match the boundaries of the industrial site as included in the dataset Business Parks.