ꯐꯥꯏꯜ:Ramsden zenith sector.jpg
ꯃꯁꯤꯒꯤ ꯄ꯭ꯔꯚꯤꯌꯨ ꯑꯁꯤꯒꯤ ꯁꯥꯏꯓ: ১৮৮ × ৩৩০ ꯄꯤꯛꯆꯦꯜꯁ. ꯑꯇꯩ ꯁꯦꯡꯅ ꯌꯦꯡꯕ ꯌꯥꯕ: ১৩৭ × ২৪০ ꯄꯤꯛꯆꯦꯜꯁ | ৯৫২ × ১,৬৭০ ꯄꯤꯛꯆꯦꯜꯁ.
ꯐꯥꯏꯜ ꯑꯁꯦꯡꯕ (৯৫২ × ১,৬৭০ ꯄꯤꯛꯆꯦꯜꯁ, ꯐꯥꯏꯜ ꯆꯥꯎꯕꯒꯤ ꯆꯥꯡ: ৫৯৪ KB, MIME ꯃꯈꯜ: image/jpeg)
ꯑꯇꯦꯟꯕꯥ ꯁꯟꯗꯣꯛꯅꯥ ꯇꯥꯛꯄꯥ
| ꯁꯟꯗꯣꯛꯅꯥ ꯇꯥꯛꯄꯥRamsden zenith sector.jpg | Ramsden's zenith sector, used in the Great Trigonometrical Survey |
| ꯆꯩꯆꯠ | |
| ꯍꯧꯔꯛꯐꯛ | Strahan, C. (1903). "The Survey of India". Professional papers of the Corps of Royal Engineers 28: 141-171. |
| ꯄꯨꯊꯣꯛꯂꯤꯕ ꯃꯤ | C. Strahan |
ꯑꯌꯥꯕꯥ
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer. This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1931. |
| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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| ꯍꯧꯖꯤꯛꯀꯤ | ꯱꯸:꯲꯸, ꯷ ꯃꯥꯔꯆ ꯲꯰꯱꯶ |  | ৯৫২ × ১,৬৭০ (৫৯৪ KB) | smartcommons>Shyamal | {{Information |Description=Ramsden's zenith sector, used in the Great Trigonometrical Survey |Source={{cite journal|author=Strahan, C. |year=1903 |title=The Survey of India |url=https://archive.org/stream/professionalpape28grea#page/n211/mode/2up |jour... |
ꯐꯥꯏꯜꯒꯤ ꯁꯤꯖꯤꯟꯅꯐꯝ
ꯃꯁꯤꯒꯤ ꯐꯥꯏꯜ ꯁꯤ ꯁꯤꯖꯤꯟꯅꯕ ꯂꯃꯥꯏꯁꯤꯡ ꯂꯩꯇꯦ ꯫
