Databases Reference
In-Depth Information
geotemporal extent, such as
where
label
is a descrip-
tive scene name, such as ”New York City”, ”mall” or ”fire,” and
label, lt, lg, h, w,
[
t
b
,t
e
]
denotes latitude, longitude, height and width of a bounding box covering a
geographic area of the scene and [
t
b
,
t
e
] denotes the temporal period of the
scene. Figure 1 shows the geotemporal role hierarchy that is associated with
a generic scene type or with a scene that is located in a particular location or
an area.
lt, lg, h, w
Scene Hierarchy
scene
business
incident
store
natural
Incident
man-made
incident
lodging
retail
store
department
store
car
accident
fire
Crime
hotel
Inn
hurricane
Miami, 8/12/2004
(13.4, 60, 10, 10)
2005
NYC,
Morning
Macy's
20 Elm street
Newark, NJ
200 Main St
Los Angeles, LA
May 12, 2007
GWB, May 2007
policeman
manager
Role Hierarchy
law
enforcement
administrator
Role
Fig. 1.
Geotemporal Role hierarchy
denotes any
manager at a retail store scene regardless of the location of the store, while
Examples of geotemporal roles include:
manager, retail store
denotes any manager whose
location is at this particular store located in 200 Main Street in LA on May
12, 2007. Geotemporal roles can be represented as a logical expression, called
geotemporal role expression
re
.
manager, 200 Main Street, LA, May 12, 2007
Geotemporal Object
Each geotemporal object belongs to an object type, which can be organized
into a geotemporal object type hierarchy, as shown in Figure 2. Each geotem-
poral object type is associated with a set of attributes, which include a unique
