Map of separation barriers in the world. The exact status of many barriers is unknown (length completed, etc), but also the number of barriers.  A separation barrier is not necessarily a border barrier
Multiple:

File:BlankMap-World6.svg
en:Category:Separation barriers
http://news.bbc.co.uk/2/hi/middle_east/8342764.stm
http://www.americanprogress.org/issues/immigration/report/2010/04/12/7659/securing-our-borders/ (il semblerait qu'il y a des "trous" dans la barrière, mais ils ne sont pas affichés ici par souci de clarté)
http://www.guardian.co.uk/world/2010/jan/11/israel-fence-egypt
http://www.guardian.co.uk/world/2012/mar/27/israel-extends-border-fence-critics
fr:Barrière de séparation
Diverses discussions sur User talk:Mapeh
Boundary walls and fences worldwide
Own work