Canadian prime meridian plaque

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    Plaque on rear of the Dominion Astrophysical Observatory building in Ottawa. 05h 02m 51.940s West of Greenwich. Prior to 1883, local mean time was used throughout North America, resulting in an inordinate number of local times. This caused convoluted regional and national train schedules. Sandford Fleming, a Canadian, proposed Standard Time at a Meeting of the Royal Canadian Institute on 1879 February 8. This was the first time the world was partitioned into time zones; which required significant knowledge of longitude and surveying, hence the importance of the prime meridian.

    Darcy Quesnel, Varshni, jmarconi, and 1 other people added this photo to their favorites.

    1. jpctalbot 97 months ago | reply

      The color might be improperly calibrated, I'll have to buy one of those Greta McBeth color charts for digital cameras. I was also thinking of taking photos of the observatory refractor telescope and other optical instruments now located at the museum of Science and Technology. I'll have to bring a stand and a polarizer for the heliostat because its behind glass in a poorly illuminated room. Plus I'm not sure about permissions.

      The plaque is located on this building : Dominion Astrophysical Observatory, Ottawa

    2. fadedgenes 92 months ago | reply

      Hi, I'm an admin for a group called Historic Plaques of Canada, and we'd love to have your photo added to the group.

    3. onetalentdog 70 months ago | reply

      Hi, I'm an admin for a group called why canada is best, and we'd love to have this added to the group!

    4. onetalentdog 70 months ago | reply

      Hi, I'm an admin for a group called just cool pictures, and we'd love to have this added to the group!

    5. jamica1 64 months ago | reply

      Hi, I'm an admin for a group called History of Canadian Science and Technology, and we'd love to have this added to the group!

    6. PhOtOnQuAnTiQuE 57 months ago | reply

      Cool photo + great story around it =)
      Thanks for the discovery

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