In 2012, the Court decided United States v. Jones, which held that "Attaching a GPS device to a vehicle and then using the device to monitor the vehicle’s movements constitutes a search under the Fourth Amendment."
This map goes from Jones back to Katz v. United Sttes. This choice of network anchor was based on analysis of Jones and its engagement with Katz on the question of a reasonable expectation of privacy. Although Justice Scalia, writing for the majority, rejected Katz's relevance in the GPS context, the citation network implicated by this map shows the privacy question is complicated.
This network thus features cases that develop the "search" and "privacy" concepts in Fourth Amendment jurisprudence. Please note that the embedded map shows the two-degree network using a Spaeth projection. Click the map to view other options.