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All, Here is the link to the Damage Proxy Map (DPM) produced by the ARIA team at JPL. http://aria-share.jpl.nasa.gov/events/20150425-Nepal_EQ/DPM/ARIA_DPM_v0.5u_CSKd_20150430.kmz Please read the message below to better understand the product and how to interpret it. In order to insert these 'Damage Proxy Map' (DPM) products into your damage assessment work flow for use in tasking search & rescue teams at the earliest possible time, please find attached the DPM product. As the caption embedded in the KMZ file states, the data used are from the Italian Space Agency (ASI) COSMO-SkyMed satellite. Further details are in that caption. These initial DPM data for the Kathmandu area have been validated & verified with several other data sets, but only to a limited degree because they were just generated on April 30, 2015. This DPM is intended to provide guidance for identifying damage to structures in urban areas. In vegetated areas and outside of the urban areas, the DPM is not intended to be useful for any other purposes so should not be interpreted or used for other purposes in those areas (e.g., we do not know if it can be used reliably for landslide mapping, etc. because vegetation changes all the time). We are finding that the DPM in many cases agrees very well with these existing products. It also identifies 'tips' (red areas) that coincide with damage that we can verify in the high-res EO imagery. In the places where we have spot-checked the DPM, in many cases it appears to us to perform very well. In other places, however, we must be clear in saying that it is not 100% accurate. Please accept the DPM "as is" and see if it can be useful to you. Past experience with DPMs from earthquakes, severe storms, and urban construction has shown good correlation between areas identified in the DPM as having significant change and damage to buildings and other urban structures. The KMZ includes the NGA damage assessment product (with purple, red dots indicating severe damage) and the DPM as a red-to-yellow scale layer. In some cases, DPM seems to have missed damage. In other areas, DPM indicates a 'tip' but the NGA product has no indication of damage. We also have seen several cases in which DPM indicates damaged buildings, and we see them for sure in the post-eq high-res EO, but they were not yet included in the NGA damage products (as of April 30). We hope for feedback from end users with the hope of improving future product releases. Sang-Ho Yun (sang-ho....@jpl.nasa.gov) is the ARIA DPM technical contact and should be contacted for further information. Thanks, Ernesto Diaz -- *Chad Blevins* GeoCenter U.S. Global Development Lab USAID 202-712-0464
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