I have published in the past several posts on the ‘Bidaubus-conflict’. The last one was http://blog.grpdesbf.nl/?p=710

It’s all about a border change on a hillside near Bagnères-de-Luchon, between the bordermarkers 407 and 409. France and Spain have agreed on a compromise in which France is about to lose 8 hectares of its territory. That is surprising because – in my opinion – the treaty is very clear about the right borderline. All the reasoning can be easily summarized in a 4-minutes video. It is in french to cross the language border. It might look a bit amateurish, but it explains well enough the inevitable logic of the treaty.