Ekron is Akir (on sheet 16). Here we are in the Shephêlah, or plain of the sea-coast.
Jabneel is Yebnah, west of Ekron, nearer the sea.
Related Commentaries of Joshua 15:11
Joshua 15:11
11 And the border went out unto the side of Ekron northward: and the border was drawn to Shicron, and passed along to mount Baalah, and went out unto Jabneel; and the goings out of the border were at the sea.