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WorksheetsGIS Spatial Data Models
Total questions: 15
Worksheet time: 8mins
What is data model?
Simple representations of complex real-world data structures
Iterative and progressive process of creating a specific data model for a determined problem domain
Abstraction of a real-world object or event
Below are the reasons why the data model is important EXCEPT
Are a communication tool
Give an overall view of the database
Organize data for •various users
Are an abstraction for the creation of bad database
Which are the basic building block(s) for data model?
Hint: Please tick more than one answer
Entity
Relationship
Constraint
Cardinality
The picture above is example of
Network Model
Hierarchical Model
Object Oriented Model
No SQL
In Relational Model, tuple represents as
rows
columns
(a) uses graphic representations to model database components.
The spacial resolution of an image is low if...
the image is clear and detailed.
the image is unclear and lacks detail.
The conventional sign for cultivated land on a topographic map is an example of ...
point data
line data
polygon data
How the data are accessed from the database?
(a)
Which is the most popular data model in DBMS?
Object-Oriented
Object-Based
Relational
Network
An object is an __________________ Unit characterized by attributes, set of orientations and rules.
Abstraction
Encapsulation
Inheritance
Methods
