How many people live in a city? This seemingly simple question very often arises in the daily work of
MSF (Doctors without Borders) or
SOS Children’s Villages. Activities like a vaccination campaign or the preparation for natural disasters require up-to-date population figures. With more and more people moving into cities, the sprawling urban areas move more and more into the focus of aid and relief organisations.
Population numbers can be estimated from the number of buildings mapped in remote sensing data, but in urban areas, 3D data is required to account for the building heights. The research project X3D4Pop, which was kicked off in Salzburg in May, aims at exploring the potential of 3D data derived from satellite image pairs initially not acquired for stereo data production, as dedicated stereo image pairs are often missing. Can image pairs from different satellites, acquired at different times, be used to derive building heights?
X3D4Pop brings together experts in photogrammetry from the German Aerospace Center
DLR and
dasymetric mapping from the Austrian Institute of Technology
AIT and the Swiss
UNEP/GRID-Geneva, and is led by
Z_GIS to further enlarge the portfolio of
remote sensing services for humanitarian organisations. X3D4Pop is funded by the Austrian
FFG, the Swiss Space Office SSO, and the DLR.
Contact:
Lorenz Wendt
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