Despite the work of the commission, disputes concerning the precise boundary alignment continued. The Ottomans and Iran agreed to work on a more precise demarcation in 1911 at the urging of Russia and the Britain, both of whom had colonial aspirations in the region. From November 1913-October 1914 a boundary commission established the Constantinople Protocol, providing a detailed delimitation of the entire boundary. The four-nation boundary commission then surveyed the border on the ground and demarcated it with pillars (excluding he Qotur area which remained in dispute), producing a detailed series of map depicting the confirmed frontier.