The quarter degree sheet, Ex. 56 H/3 No., are prepared at which scale ?

Question

Accepted Answer

The quarter degree sheet, exemplified by 56 H/3, is prepared at a scale of 1:50,000. This is because the standard topographical map series produced by the Survey of India uses a specific hierarchical system. A degree sheet (like 56 H) is further divided into 16 parts, each representing a quarter degree sheet. These quarter degree sheets are the ones typically mapped at the 1:50,000 scale. The notation "/3" in 56 H/3 specifically identifies one of these quarter degree sheets.

Now, let's examine why the other options are incorrect:

*   **Option 1: 1:250,000:** This scale is used for degree sheets themselves (like 56 H), not the quarter degree sheets derived from them. A 1:250,000 scale map covers a much larger area with less detail than a 1:50,000 scale map.

*   **Option 2: 1:100,000:** While some mapping is done at this scale, it's not the standard scale for quarter degree sheets in the Survey of India's topographical map series. The 1:100,000 scale typically represents a larger area than a quarter degree sheet mapped at 1:50,000.

*   **Option 4: 1:25,000:** This scale provides even greater detail than 1:50,000. While some specialized mapping might be done at this scale, it is not the standard scale for quarter degree sheets like 56 H/3. A 1:25,000 scale map would cover a smaller area with significantly more detail than a 1:50,000 scale map.

Therefore, the 1:50,000 scale (Option 3) is the correct and standard scale for the quarter degree sheet, such as 56 H/3, as per the Survey of India's topographical map series.