Question

Which instrument is used for interpretation of aerial photographs?

• A. Stereogram
• B. Stereotriplet
• C. Stereoscope
• D. Vectograph

Hint:

Remember these aerial photography terms: \[ \boxed{ \begin{aligned} \text{Stereoscope} &\rightarrow \text{Views aerial photographs in 3D}, \text{Stereogram} &\rightarrow \text{Three-dimensional image}, \text{Aerial Mosaic} &\rightarrow \text{Joined aerial photographs}. \end{aligned} } \] Mnemonic: “Stereoscope = Scope for viewing in 3D.”

Answer 1

The Correct Option is C

Concept: A Stereoscope is an optical instrument used to view two overlapping aerial photographs simultaneously, producing a three-dimensional (stereoscopic) image. It is the primary instrument used for aerial photograph interpretation.

Step 1: Identify the instrument used. The instrument employed to interpret overlapping aerial photographs is the \[ \boxed{\text{Stereoscope}} \]

Step 2: Eliminate the incorrect options. \[ \begin{aligned} A.\ \text{Stereogram} &\rightarrow \text{A stereoscopic image, not an instrument.} B.\ \text{Stereotriplet} &\rightarrow \text{A set of three photographs, not a viewing instrument.} C.\ \text{Stereoscope} &\rightarrow \text{Instrument used for stereoscopic interpretation.}\checkmark D.\ \text{Vectograph} &\rightarrow \text{A special stereoscopic image/display, not the standard interpretation instrument.} \end{aligned} \] Hence, \[ \boxed{\text{(C)}} \]