What does Joshua 15:9 mean?

From the top of the hill, the border curved to the spring of the waters of Nephtoah, went out to the towns on Mount Ephron, and turned toward Baalah (which is Kiriath-jearim). Joshua 15:9 - Modern Text Bible

(The border continues past springs and towns, ending up at Baalah, another name for Kiriath-jearim.)