SAR interferometry shows edges of Venice in motion

The juxtaposition of old and new data shows the change. An aerial or satellite picture of Venice (black and white) is overlaid with the current data of the earth reconnaissance satellite (colored). The space data show that part of Venice is sinking millimetre by millimetre into the sea - more in the red and violet areas than in the blue and green. Such details help concentrate structural protection measures in the places where they are most needed.
Credits: GAMMA/ESA