Courts have held that there is a height (not sure of specifics) above which aerial surveillance is legal without a warrant. The idea is that if it is the same h

Courts have held that there is a height (not sure of specifics) above which aerial surveillance is legal without a warrant. The idea is that if it is the same height at which commercial aircraft (usually helicopters) fly, then it is a view available to the public. See Examples & Explanation: Criminal Procedure Constitution & Police, Seventh Edition (Examples & Explanations) by Robert Bloom for a detailed analysis.