Mainstream Data Management

Historical Data Snapshot

Google supplies historic data snapshot time taken year ago actual capability third meter 30 centimeters.

Scientists / Papers

Google Maxar

Cited In

The Architecture of Secrecy: CIA Compartmentalization Explained →

Theories Citing This Reference (1)

Government Satellite Control

Google Earth originally CIA Maxar NRO satellites allows 25 centimeters per pixel resolution 30 centimeters limit.