{"id":8381,"date":"2011-10-08T08:58:32","date_gmt":"2011-10-08T08:58:32","guid":{"rendered":"http:\/\/profpete.com\/blog\/?p=8381"},"modified":"2018-12-23T07:19:45","modified_gmt":"2018-12-23T07:19:45","slug":"where-is-zero-on-the-earth","status":"publish","type":"post","link":"https:\/\/profpete.com\/blog\/2011\/10\/08\/where-is-zero-on-the-earth\/","title":{"rendered":"Where is Zero on the Earth?"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<p>This is another in the series of podcasts from our trip in Europe.<\/p>\n\n\n\n<p>Knowing exactly where you are on the earth\u2019s surface is pretty important for most of us, and absolutely vital for airline pilots, surveyors, engineers and cartographers. Early study of location was difficult and inaccurate, hampered by lack of technology we now take for granted, and also by faulty understandings of the earth\u2019s shape and location and movement in space.<\/p>\n\n\n\n<p>I have long wanted to visit Greenwich, in London, to see the place which was designated as one of the \u2018starting place\u2019 for measurements on the earth\u2019s surface, and also the reference point for time zones.<\/p>\n\n\n\n<p><strong>Google Map<\/strong><\/p>\n\n\n\n<iframe loading=\"lazy\" src=\"https:\/\/www.google.com\/maps\/embed?pb=!1m18!1m12!1m3!1d2484.981548961411!2d-0.0026888842311438717!3d51.47685297963004!2m3!1f0!2f0!3f0!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x47d8a82a8ca9dca7%3A0x31abb25f451c8402!2sRoyal+Observatory+Greenwich!5e0!3m2!1sen!2sph!4v1545549529372\" width=\"600\" height=\"450\" frameborder=\"0\" style=\"border:0\" allowfullscreen><\/iframe>\n\n\n\n<p>This map shows the location of the video, and the Prime Meridian:<\/p>\n\n\n\n<p>View\u00a0<a href=\"https:\/\/goo.gl\/maps\/YMCjyTT7dUr\">Royal Observatory, Greenwich, London, UK<\/a>\u00a0in a larger map<\/p>\n\n\n\n<p>Royal Observatory, Greenwich<\/p>\n\n\n\n<p>In 1884, Greenwich was chosen as the place for the \u2018Prime Meridian\u2019, the official dividing line between the eastern and western hemispheres, the line of 0\u00b0 longitude. Of course, the Equator is the equivalent line of&nbsp;0\u00b0 latitude, dividing the northern and southern hemispheres.<\/p>\n\n\n\n<p>The&nbsp;<a href=\"http:\/\/www.rmg.co.uk\/royal-observatory\/astronomy-and-time-galleries\">Royal Observatory<\/a>&nbsp;at Greenwich website includes this interesting snippet about the history of the Prime Meridian:<\/p>\n\n\n\n<p><em>The Greenwich Meridian was chosen as the Prime Meridian of the World in 1884. Forty-one delegates from 25 nations met in Washington DC for the International Meridian Conference. By the end of the conference, Greenwich had won the prize of Longitude 0\u00ba by a vote of 22 to 1 against (San Domingo), with 2 abstentions (France and Brazil).<\/em><\/p>\n\n\n\n<p>The day we visited we had to drive to Scotland and didn\u2019t have time to go into the observatory. If you have time when you visit London, I recommend a visit to this iconic location on our planet.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This is another in the series of podcasts from our trip in Europe. Knowing exactly where you are on the earth\u2019s surface is pretty important for most of us, and absolutely vital for airline pilots, surveyors, engineers and cartographers. Early study of location was difficult and inaccurate, hampered by lack of technology we now take &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/profpete.com\/blog\/2011\/10\/08\/where-is-zero-on-the-earth\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Where is Zero on the Earth?&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[74,75,61,12,76],"tags":[78,81,79,11],"class_list":["post-8381","post","type-post","status-publish","format-standard","hentry","category-geometry","category-history-and-math","category-k-6-math-vlog","category-teaching-mathematics","category-time","tag-geometry","tag-history-and-math","tag-podcast","tag-teaching-math"],"_links":{"self":[{"href":"https:\/\/profpete.com\/blog\/wp-json\/wp\/v2\/posts\/8381"}],"collection":[{"href":"https:\/\/profpete.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/profpete.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/profpete.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/profpete.com\/blog\/wp-json\/wp\/v2\/comments?post=8381"}],"version-history":[{"count":4,"href":"https:\/\/profpete.com\/blog\/wp-json\/wp\/v2\/posts\/8381\/revisions"}],"predecessor-version":[{"id":8511,"href":"https:\/\/profpete.com\/blog\/wp-json\/wp\/v2\/posts\/8381\/revisions\/8511"}],"wp:attachment":[{"href":"https:\/\/profpete.com\/blog\/wp-json\/wp\/v2\/media?parent=8381"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/profpete.com\/blog\/wp-json\/wp\/v2\/categories?post=8381"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/profpete.com\/blog\/wp-json\/wp\/v2\/tags?post=8381"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}