Question

The spatial data is linked with associated attribute data by means of a common key called .........

• A. Unique ID
• B. Special ID
• C. Unique number
• D. Special number

Hint:

Always use a Unique ID to join spatial and attribute data accurately.

Answer 1

The Correct Option is A

In GIS databases, spatial data (maps, coordinates) are connected to attribute data (descriptions, statistics) using a common key field.
This key is typically known as a Unique ID (UID).
The Unique ID ensures that each spatial feature can be linked correctly with its related attribute information.
Without a unique identifier, it would be impossible to maintain a one-to-one relationship between spatial and tabular data.
Therefore, option (A) Unique ID is the correct answer.