Uploaded December 2023 | Updated September 2026, 1 week ago

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In the last video, I showed you an optical instrument used for surveying - but not in the way you might think. This device is a Wild-Heerbrugg mirror stereoscope, designed for viewing pairs of aerial stereo photographs in three dimensions.

SOURCES:
ebay.com/itm/256064185376
https://vm.civeng.unsw.edu.au/surveying/f_pall/html/s74.html
oldtopographer.net/the-topographers-tools/stereoscopes
oldtopographer.net/the-topographers-tools/stereoscopes/stereoscope-resources
ir-geo.com/getattachment/محصولات/استریوسکوپ/استریوسکوپ-رومیزی/5022/ztt_pdf_5022.pdf.aspx?maxsidesize=960
https://vm.civeng.unsw.edu.au/surveying/f_pall/html/s72.html
docs.google.com/file/d/0Bz0ZKN4l6fZfbW1zN0RXYnU4X2M/edit?resourcekey=0-qOuguMGxBBKcGuQpDJc_Sg