I don't know if it's been posted before, but that is a great find!
A new internet platform has been launched today to rescue cultural heritage sites on the verge of being irremediably lost, said Global Heritage Fund,
Combining Google Earth, scientific mapping from Esri, satellite imagery from DigitalGlobe, and social networking, the platform aims to serve as an early warning system for site conservation leaders, archaeologists, local communities, government officials, and volunteers.source