Abstract. The aggregation of web services in order to achieve a common goal
is a basic concept in Service Oriented Architectures (SOA). This paper
demonstrates OGC Web Services (OWS) aggregation based on a simulated
bomb threat scenario which is a possible disaster management example. Web
services are aggregated based on the OGC Web Processing Service (WPS)
interface. Here the concept of a “Composite-WPS” is introduced and used to
invoke all other services involved. The presented approach is compared to the
use of BPEL which is an orchestration language with some technical pitfalls
when applied to the orchestration of OWS.
Keywords: geo-processing, geographical web services, orchestration, Web
Processing Service (WPS), service chain, composition, SDI, disaster
management