or download this
$ perl websvc_usgs_fetch_bounding_box.pl 34.1234 -78.1234 1.5
Found 11 markers within 1.5 miles centered around [-78.1234, 34.1234]
...
34.12708 -78.10360 CAMPBELL EB2108
34.14593 -78.10423 WINNABOW AZ MK 2 EB1389
34.14722 -78.11694 N 235 EB0300