Commons:Featured picture candidates/File:1922 Index of Great Trigonometrical Survey of India.jpg

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File:1922 Index of Great Trigonometrical Survey of India.jpg, featured[edit]

Voting period is over. Please don't add any new votes.Voting period ends on 8 Jan 2022 at 21:36:48 (UTC)
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Index to the Great Trigonometrical Survey of India (1922). The survey had great scientific and popular accomplishments, namely being one of the first accurate measurements of a section of a longitude's arc, other measurements that led to the development of the theory of isostasy, and the measurements of the height of the Everest, K2, and Kanchenjunga (3 of the highest mountains in the world).
  •  Comment @Yann: Very poor quality? I have not yet decided about supporting this but it’s an excellent scan of this historic map IMHO. Maybe you mistook a preview downscaled version for the full-sized one? --Kreuzschnabel 22:17, 30 December 2021 (UTC)[reply]
I'm guessing @Yann looked at a non fully downloaded progressive Jpeg? - Benh (talk) 09:24, 31 December 2021 (UTC)[reply]
  • The full image is over 24 million pixels and I think most of the merit as FP comes from its historic and scientific importance rather than the image itself (although I am an absolute sucker for maps and data visualizations). A. C. Santacruz (talk) 12:22, 31 December 2021 (UTC)[reply]
  •  Support Very good scan of a very interesting special map. The triangulation was a fundamental invention for surveying and geography, and the triangulation or “trigonometrical survey” of whole countries and (sub)continents, like India in this case, was a heroic undertaking which made accurate, reliable maps possible for the first time. This map summarizes and illustrates the Great Trigonometrical Survey of India (1802–1871), one of the most important ventures of that kind. — @Yann: I have replaced {{FPX}} by {{FPX contested}}, as recommended in the documentation for {{FPX contested}}. No offence! I assume that there was just some misunderstanding somewhere … --Aristeas (talk) 08:29, 31 December 2021 (UTC)[reply]
  •  Support according to Aristeas' convincing points. -- Radomianin (talk) 22:54, 31 December 2021 (UTC)[reply]
  •  Support per above. Very important document, and quite a clean scan. -- Ikan Kekek (talk) 01:43, 1 January 2022 (UTC)[reply]
    It's made with a Xerox, my first time seeing such a thing (Gen Z moment, I guess). I wish I had access to such a crisp scanner myself as I have a bunch of early 1900s Basque and Spanish documents as well as some old second-hand books with images that could really do with some scanning. this upload I made, for example is an A5 photograph but best I could do was take a photo with my Olympus Mirrorless. A. C. Santacruz (talk) 11:28, 2 January 2022 (UTC)[reply]
  •  Support Kind of media that can hook me to a topic (triangulation here). But it would be nice that the description page summarizes this better (ELI5). What are the blue lines? red lines? green grid? Why only a "grid" pattern is covered by the survey? - Benh (talk) 12:46, 1 January 2022 (UTC)[reply]
    Wish I could tell you, Benh. These types of surveys are way out of my area of expertise, just found the file after some good ol' blue-link rabbit hole in WP and thought it deserved to be a featured picture. A. C. Santacruz (talk) 12:59, 1 January 2022 (UTC)[reply]
  • Benh, I would guess (of course, we should not guess, but know, but educated guessing is better than nothing ;–): green lines = division of the sheets of the topographical map published by the government, the numbers and letters giving the order code of the individual sheets; dashed red lines = principal triangulation between the most important points; solid red lines = principal railway lines; blue lines = secondary triangulation. We would know more when we could find a copy of the Report for the year 1921–22 which was illustrated by this map. --Aristeas (talk) 15:57, 2 January 2022 (UTC) Update: I have searched the web for the Report, but have not found it (there are copies of an archeological report for India for the year 1921–22 online, but that’s not the same). Maybe somebody else can find it … --Aristeas (talk) 16:57, 2 January 2022 (UTC)[reply]
Confirmed results:
Result: 13 support, 1 oppose, 0 neutral → featured. /--MZaplotnik(talk) 09:34, 9 January 2022 (UTC)[reply]
This image will be added to the FP gallery: Non-photographic_media/Maps#Maps_of_Asia
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