Question-Answer:

In Map versus Aerial photograph, due to symbolic representation the clarity of details is

• (a) less on map than on a photo
  
• (b) more on map than on a photo
  
• (c) less on a photo than on map
  
• (d) more on a photo than on map

Ans. (b)

Differences between Map and Aerial Photograph,
1. The map is an orthographic projection, whereas an aerial photograph is a central projection, i.e. perspective projection.
2. The map has a single constant scale, whereas it varies from point to point depending upon their elevations in an aerial photograph. In the case of the photograph, the terrain area which has higher elevation is closer to the camera and therefore appears larger than the terrains area laying at a lower elevation.
3. The number of details on a map are selective whereas in a aerial photograph there is a large number of details.
4. Due to the symbolic representation, the clarity of details is more on the maps than on photo.

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