Visualization of Spatial Constraint Databases

Synonyms

Visualization of constraint databases; Visualization of spatiotemporal constraint data; Static displays in constraint databases

Definition

The visualization of spatial constraint databases is an application that reads spatial data from spatial constraint databases, understands the meaning of the data based on the spatial data models, and displays those data as computer graphics to help cognition, analyzing and reasoning.

Main Text

To display the spatial data in a constraint database system, the system will first transform the vector-based spatial data, which is represented by linear equality and linear inequality constraints in a disjunctive normal form (DNF), into a set of points, segments, and convex polygons, then associate a color with the individual shapes and project them onto the output devices.

For example, the following constraint tuple represents a triangle. The visualization of spatial constraint databases can display the triangle on a computer through above...