It is real slowly to practise a dry reason size comparing map similar The True Size Of using the Google Maps API. Google's Maps API allows you lot to define polygon shapes every bit both draggable together with geodesic. This way if you lot add together a dry reason polygon sort to a Google Map the map's users tin order notice drag the sort some the map together with the size volition modify size depending on the shape's latitude.
In Leaflet.js in that place is no uncomplicated method inwards the JavaScript library for making a polygon sort both draggable together with responsive to the map projection. Therefore Webkid has created a plug-in for Leaflet which allows you lot to add together draggable polygons that resize automatically depending on the score of latitude.
Leaflet Truesize includes links to download the plugin together with an explanation of how it should survive used to practise a size comparing map. It likewise contains an event map which allows you lot to drag Republic of Republic of India together with United Mexican United States of America on a map to compare their size amongst other countries some the world.