Tuesday, September 22, 2015

Georelational data model Vs Object oriented data model

A georelational data model uses a split data system (spatial data and attribute data in different files) and the two tables are linked by feature ID. Each map feature has a unique label ID. Attribute data are stored in a “Feature Attribute Table”. Each map feature has a unique label ID.

In a table:
ROW = RECORD = TUPLE
COLUMN = FIELD = ITEM

The object oriented data model stores both spatial and attribute data in a single database to reduce processing overload.