The famous Kunyu Wanguo Quantu map of Matteo Ricci is displayed using Leaflet.js.
Libvips has been used in order to generate tiles.
vips dzsave
--layout zoomify
In order to load tiles with a zoomify layout, a specific plug-in ([1], [2]) has been employed.
A switch button above the Leaflet zoom in/out control have been included in order to toggle the visibility of the highlighted image portions.
Modified http://cdn.leafletjs.com/leaflet/v0.7.7/leaflet.js to a secure url
https://d3js.org/d3.v3.min.js
https://cdn.leafletjs.com/leaflet/v0.7.7/leaflet.js