and it went out southward of the ascent of Akrabbim, and passed along to Zin, and went up by the south of Kadesh-barnea, and passed along by Hezron, and went up to Addar, and turned about to Karka;
Ancient Near Easterners used natural landmarks (rivers, mountains, deserts, towns, etc.) to construct borders as well as artificial boundaries that they made by drawing lines between sites. Virtually all nations have used these methods, and they are still common today.