Describe database models and database modelling. Give an account of various types of database models.

Database modeling is a crucial aspect of spatial analysis and modeling as it determines how spatial data is structured, stored, and accessed. A database model is essentially a framework for organizing and managing data. It defines the logical structure of the data, how the data is stored, and how relationships between data are represented. Database modeling helps ensure that spatial data can be queried efficiently, manipulated accurately, and integrated effectively into geographic information systems (GIS) and spatial analysis tools.

There are several types of database models, each suited to different types of data storage, processing, and querying requirements. These models can be broadly categorized as hierarchical, network, relational, object-oriented, and spatial databases.

### 1. Hierarchical Database Model
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