31:T464,map = { // You'll often see Leaflet examples initializing a map like L.map('map'), // which tells the library to look for a div with the id 'map' on the page. // In Observable, we instead create a div from scratch in this cell, so it's // completely self-contained. let container = DOM.element('div', { style: `width:${width}px;height:${width/1.3}px` }); // Note that I'm yielding the container pretty early here: this allows the // div to be placed on the page. This is important, because Leaflet uses // the div's .offsetWidth and .offsetHeight to size the map. If I were // to only return the container at the end of this method, Leaflet might // get the wrong idea about the map's size. yield container; // Now we create a map object and add a layer to it. let map = L.map(container, { minZoom: 2, maxZoom: 6 }).setView([0,15], 7); let osmLayer = L.tileLayer('https://tiles.arcgis.com/tiles/N65tCatI62OoqtGt/arcgis/rest/services/Mercator_Terre/MapServer/tile/{z}/{y}/{x}', { attribution: 'UniLausanne, Mercator Globes.' }).addTo(map); }32:[] 2f:{"title":"Mercator projection of a Mercator globe","cells":[{"id":0,"value":"md`# Mercator projection of a Mercator globe`","pinned":false,"hidden":false,"mode":"ojs"},{"id":7,"value":"$31","pinned":false,"hidden":false,"mode":"ojs"},{"id":271,"value":"md`The University of Lausanne has recently discovered it had two beautifully ~~forgotten~~ preserved globes produced by Gérard Mercator, restaured them, and put them up on ESRI for an amazing [🌎orthographic projection](https://www.arcgis.com/home/webscene/viewer.html?webscene=3fd3b29db53745238f6f5e70dc0911d9).\n\nOf course we can display the tileset in the 🗺 Mercator projection as well, using [Leaflet.js](https://beta.observablehq.com/@tmcw) (thanks, Tom!).\n\nLearn all about this discovery and restauration here:\n\n`","pinned":false,"hidden":false,"mode":"ojs"},{"id":11,"value":"html`

\ntech zone\n`","pinned":false,"hidden":false,"mode":"ojs"},{"id":4,"value":"L = require('leaflet@1.2.0')","pinned":false,"hidden":false,"mode":"ojs"}],"files":"$W32","stdlib":"1","titling":"auto"}