1. GTECH 709 Vector data models
Spaghetti vs topological models Vector model details
Topology

2. Vector Data Models
Spaghetti model A file of spatial data that is a just a collection of co-ordinate strings. Each entity (or piece of spaghetti) is represented by one data entry. There is no topology.
Topological models Topology refers to the spatial relationships between objects. The topological model represents spatial relationships such as: length, area, connectivity, contiguity

3. The Vector Data Model

4. Vector Details
Nodes
Arcs
Polygons

5. Topology
Maintaining spatial relationships

6. Topology (2)