The 'A Priori information for Earthquake damage mapping' (APE) approach proposed in APHORISM aims at generating maps of damage caused by a seism using satellite remote sensing data and ground data.

Soon after a seismic event a fast and, as much as possible, accurate damage map of the hit urban area is extremely important to guide and support rescue team operations.  In this respect, Earth Observation (EO) data have demonstrated their capability to provide useful information, especially if the earthquake occurs in remote regions or communication infrastructures fail.

We can find a wide literature concerning the use of EO data to investigate earthquake damages, but usually the approaches are only based on change detection techniques and classification algorithms. The currently damage mapping procedures usually do not account for information about soil vulnerability, which can play a very important role on local amplification effects. Moreover, the seismological information is not accounted as well, such as acceleration data that are strongly linked to collapsed building or heavy damage.

The novelty of APE relies on the exploitation of a-priori information derived by InSAR time series to measure surface movements, shakemaps obtained from seismological data, and other vulnerability information available a priori. Such a-priori information is then integrated with change detection maps to improve accuracy and limit false alarms.

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