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Location/Spatial database

Description

A spatial database is a collection of spatial objects (or items), such as pixels, points, lines, and polygons. A sample spatial database generated from the set of items, I={a,b,c,d,e,f}, is shown in below table:

Item	Spatial information
a	Point(0 0)
b	Point(0 1)
c	Point(1 0)
d	Point(0 2)
e	Point(4 0)
f	Point(5 1)

Rules to create a location database

1. Every row must contain only two columns, namely item and its spatial information.
2. An item and its spatial information have to be seperated using a seperator, such as tab space.

Format of a location database

     item<sep>spatialInformation

An example

a   Point(0 0)
b   Point(0 1)
c   Point(1 0)
d   Point(0 2)
e   Point(4 0)
f   Point(5 1)