{"version":"1.0","provider_name":"GeoCurrents","provider_url":"https:\/\/www.geocurrents.info","author_name":"Martin W. Lewis","author_url":"https:\/\/www.geocurrents.info\/blog\/author\/martin-lewis\/","title":"As Can Be Seen on Old Maps, Latitude \u2013 Unlike Longitude \u2013 Has Long Been Easy to Measure - GeoCurrents","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"K7sjn9epPK\"><a href=\"https:\/\/www.geocurrents.info\/blog\/2025\/11\/04\/as-can-be-seen-on-old-maps-latitude-unlike-longitude-has-long-been-easy-to-measure\/\">As Can Be Seen on Old Maps, Latitude \u2013 Unlike Longitude \u2013 Has Long Been Easy to Measure<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.geocurrents.info\/blog\/2025\/11\/04\/as-can-be-seen-on-old-maps-latitude-unlike-longitude-has-long-been-easy-to-measure\/embed\/#?secret=K7sjn9epPK\" width=\"600\" height=\"338\" title=\"&#8220;As Can Be Seen on Old Maps, Latitude \u2013 Unlike Longitude \u2013 Has Long Been Easy to Measure&#8221; &#8212; GeoCurrents\" data-secret=\"K7sjn9epPK\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n<\/script>\n","thumbnail_url":"http:\/\/www.geocurrents.info\/wp-content\/uploads\/2025\/11\/Latitude-on-Old-and-New-Maps-scaled.jpg","thumbnail_width":2560,"thumbnail_height":1443,"description":"Latitude, as we have seen, is closely connected to midday sun angles. Because of this relationship, latitude has long been relatively simply to measure. Four hundred years ago, navigators could easily determine how far they were to the north or south of the Equator if the day was clear and they had kept track of [&hellip;]"}