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Fig. 3 XML representation of the updated vSensor as HTTP Response
TO_KMLGEOMETRY() to convert the instances in the database to a KML rep-
resentation. The output generated as a result of a query in Oracle Spatial is then
improved to represent the semantic information in form of KML < Extended
Data >. The KML representation that is returned as a result of method invocation
through HTTP GET request is illustrated in Fig. 4 .
The URI of the HTTP GET request can be defined as a Network Link in
Google Earth and it can be updated on specific time intervals to show most up-
to-date information regarding a vSensor. Such a representation tested during this
study is shown in Fig. 5 .
ISpaceREST : This interface contains the definitions of methods for getting
the information about Spaces from an XML file (Spaces XML) and generating
required Space objects in the Oracle Spatial database, and generation of KML
representation of Space classes. The concrete class Space deals with the appli-
cation logic based on the methods of the ISpaceREST , contains GUID, vSen-
sor List, SensorCount and geometry (related MinX, MinY, MizZ, MaxX, MaxY
and MaxZ) as attributes. Every Space class maintain a list of vSensor(s) that it
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