
151Spatial Big Data
(a)
FIGURE 8.1 SBD challenges through data volume, velocity, and variety. (a) Wide-area per-
sistent surveillance. FOV: eld of view. (Photo courtesy of the Defense Advanced Research
Projects Agency (DARPA), Arlington, VA.) EO: electrooptical. (From Levchuk, G. et al.,
Proc. SPIE, 7704, 77040P, 2010.) (b) Lidar images of ground zero rendered September
27,2001, by the US Army Joint Precision Strike Demonstration (JPSD) from data collected
by NOAA ights. Thanks to NOAA/US Army JPSD.