{"id":86,"date":"2012-06-08T17:28:47","date_gmt":"2012-06-08T06:28:47","guid":{"rendered":"https:\/\/mindbleach.com\/words\/?p=86"},"modified":"2012-10-25T10:27:05","modified_gmt":"2012-10-24T23:27:05","slug":"on-location","status":"publish","type":"post","link":"https:\/\/mindbleach.com\/words\/2012\/06\/08\/on-location\/","title":{"rendered":"On Location"},"content":{"rendered":"<p><a href=\"https:\/\/mindbleach.com\/words\/wp-content\/uploads\/2012\/06\/gps1-e1339136788276.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-88\" src=\"https:\/\/mindbleach.com\/words\/wp-content\/uploads\/2012\/06\/gps1-e1339136788276.png\" alt=\"Where am I?\" width=\"256\" height=\"256\" \/><\/a><br \/>\n64 bits fit neatly onto an 8&#215;8 matrix of black\/white squares. Those 64 bits, naively encoding latitude\/longitude, will at *worst* locate any point on the planet to within 1cm.<\/p>\n<p>Equatorial circumference: 40,075,017 m<br \/>\nMeridional circumference: 40,007,860 m<\/p>\n<p>Assuming 32 bits per measurement;<br \/>\nLongitudinal precision: 40075017 m \/ (2^32) in cm = 0.9330692 centimetres<br \/>\nLatitudinal precision: 40007860\/2 m \/ (2^32) in cm = 0.46575279 centimetres<br \/>\nWe don&#8217;t even need that 64th bit; latitude will fit into 31.<\/p>\n<p>If you want to physically encode that point onto a physical object\/location, each of those square &#8216;bits&#8217; can&#8217;t be larger than 1.25mm wide.<\/p>\n<p>Smaller if you leave some space to write &#8220;YOU ARE HERE&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>64 bits fit neatly onto an 8&#215;8 matrix of black\/white squares. Those 64 bits, naively encoding latitude\/longitude, will at *worst* locate any point on the planet to within 1cm. Equatorial circumference: 40,075,017 m Meridional circumference: 40,007,860 m Assuming 32 bits &hellip; <a href=\"https:\/\/mindbleach.com\/words\/2012\/06\/08\/on-location\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-86","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/mindbleach.com\/words\/wp-json\/wp\/v2\/posts\/86"}],"collection":[{"href":"https:\/\/mindbleach.com\/words\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mindbleach.com\/words\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mindbleach.com\/words\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mindbleach.com\/words\/wp-json\/wp\/v2\/comments?post=86"}],"version-history":[{"count":7,"href":"https:\/\/mindbleach.com\/words\/wp-json\/wp\/v2\/posts\/86\/revisions"}],"predecessor-version":[{"id":148,"href":"https:\/\/mindbleach.com\/words\/wp-json\/wp\/v2\/posts\/86\/revisions\/148"}],"wp:attachment":[{"href":"https:\/\/mindbleach.com\/words\/wp-json\/wp\/v2\/media?parent=86"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mindbleach.com\/words\/wp-json\/wp\/v2\/categories?post=86"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mindbleach.com\/words\/wp-json\/wp\/v2\/tags?post=86"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}