Spatial and Temporal Information
Temporal interval relations; temporal logic
state-based representations; actions as state changes;
preconditions - body of an action - effect
temporal annotation: actions are represented as
state changes that are annotated with temporal data such as
duration
non state-based representation: for example, Allen's interval logic
which uses "time period" and "meet" as primitives and the basic relations
"equal", "before", "meets", "starts", "finishes", "during", "overlaps".
Spatial information
raster data: pixel- or cell-based; cannot be scaled;
can represent complex continuous features; examples:
gif files, jpeg files, bitmaps
vector data: points and lines in a coordinated system;
object-oriented; can be scaled; examples: CAD, Flash, VML
attribute data: non-spatial attributes that apply to spatial
information
geographic information systems: storage, analysis and retrieval
of spatial information