Spatial defines a number of geometry types:
The basic building block in Spatial is an element. Types, like mentioned before, are point, line, or polygon. Many elements make up a geometry. And a collection of geometries is a layer.
Spatial allows you to perform an area of interest query. There are two tiers to its query model: (1) primary filter, and (2) secondary filter. To help speed querying, a concept of a spatial index has been created. This is a logical index. There are two types. The first, which is the default, is the R-tree. It uses a minimum bounding box. The second is the quadtree. It uses a technique called tessellation. Each rectangle is chopped into smaller rectangles.