Please add map attribution
Hi! You've made a great website, thanks.
I have noticed that you use OpenStreetMap data for your low-zoom tile layer, as well as indirectly via ESRI layer. Could you please add the required attribution (e.g. in form "Map Data © OpenStreetMap") somewhere on the screen? Leaflet library can do that, if you pass this string in an "attribution" key of a layer.
Well I will do attribution in some place, where I will find a space on a page.