http://www.lib.utexas.edu/usage_statement.html?maps=yes:
"Most of the maps scanned by the University of Texas Libraries and served from this web site are in the public domain. No permissions are needed to copy them. You may download them and use them as you wish. A few maps are copyrighted, and are clearly marked as such."
Public domainPublic domainfalsefalse
この作品は、次の理由でパブリックドメインに属します。it has been taken from a collection of public domain maps at the University of Texas Library''