Survey Instruments

Product Details:

• The parallax bar is an instrument designed for use with a mirror stereoscope that has a stereo base of ten inches or less.
• The bar is used to determine the height difference of natural and manmade features when viewing stereoscopic photographs.
• The parallax difference can then be used to compare the relative heights.
• Parallax is an apparent shift in the position of an object due to shift in the position of the observer camera (in aerial surveying).
• We experience this phenomenon when a moving body ( a shift in position when compared to a static object considering camera as eye).