Question

Which of the following errors can cause change in shape and scale of the resultant map?

• A. Scanning error
• B. Geo-referencing error
• C. Human error
• D. Technical error

Hint:

Georeferencing is like stretching a rubber sheet over a globe. If you pin it in the wrong spots, the picture printed on the rubber gets warped and stretched out of shape!

Answer 1

The Correct Option is B

Step 1: Concept
When converting physical maps or raw satellite images into a usable GIS format, the data must be aligned to a real-world coordinate system.

Step 2: Meaning
Changes in a map's fundamental geometry—such as its scale, rotation, and shape—occur during mathematical transformations.

Step 3: Analysis

• Scanning errors generally cause poor image quality, pixelation, or missing data segments.
• Geo-referencing is the process of assigning spatial coordinates to an image. This mathematical transformation warps, scales, and rotates the image to fit the geographic grid. If incorrect control points are used, the resulting map will suffer from severe geometric distortion (change in shape and scale).

Step 4: Conclusion
Errors in the georeferencing transformation directly result in geometric distortions of shape and scale. Final Answer: (B)