The upper and lower stadia hair readings on a stadia rod held at station B were observed  as 3.50 and 1.00 m, respectively, with the use of a transit with an internal focusing  telescope and having a stadia interval factor of 99.5. The height of the instrument above  station A is 1.45 m, and the rod reading is taken at 2.25 m. Determine the horizontal  distance between points A and B, and the elevation of point B, if the elevation of point A  is 155.54 m, above mean sea level.

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Photogrammetry

Photogrammetry is a technology of taking measurements of physical objects present in the environment, using photographs. It includes the process of recording and analyzing a three-dimension image in the two-dimension form. Photogrammetry was invented around 150 years ago in 1851 by Aimé Laussedat, he was also known as the father of photogrammetry, but this method was not in use until 50 years after its invention. This method was first used in Germany by Dr. Albrecht Meydenbauer in 1893 who was the director of the Royal Prussian Photogrammetric institute founded by him.