philippec
barrier = fence
fence =  chain_link
But how to map the two openings in the area ?A node in the area and tag it with 
barrier = entrance

Sad, because a line would be more realistic.
https://www.mapillary.com/app/?pKey=f-QHfKOBs5quPByIcx4HYg&lat=51.28721252919945&lng=4.386070469294964&z=17&focus=photo&x=0.5077487651212066&y=0.49031278019342794&zoom=0
