Thanks for the helpful post!

"Charles Buckley" wrote
"In 1986, the Supreme Court decided the case of Dow Chemical v. United
States, by and through the Administrator, Environmental Agency, 476 U.S.
227, 106 S. Ct. 1819, 90 L. Ed. 2d 226 (May 19, 1986).
.

The court then tackled Dow's Fourth amendment arguments. In a 5-4
decision, the court held that the taking of aerial photography without a
warrant was not a search prohibited by the Fourth Amendment. Dow argued
that the taking of the photos was akin to snooping into the "curtilage" of
a private home, which is granted protection as a place where occupants
have a reasonable expectation of privacy that society is willing to
accept. The court rejected the industrial curtilage argument, finding that
the unenclosed commercial area is more like an "open field." What is
observable by the public is also observable by the Government inspector,
without a warrant. "