Map:Map-3.1.1/structure

{

   "layers": [
       {
           "id": "borders",
           "kind": "border",
           "label": "",
           "file": "19_map-3-1-1/borders.geojson"
       },
       {
           "id": "fronts",
           "kind": "line",
           "label": "",
           "file": "19_map-3-1-1/fronts.geojson"
       }
   ],
   "legend": [
       {
           "kind": "linedashed",
           "swatch": "#ff0000",
           "border": "",
           "layer": "fronts",
           "data": "#ff0000",
           "label": "Russian Army advance, 1914–1915"
       },
       {
           "kind": "line",
           "swatch": "#f57c00",
           "border": "",
           "layer": "fronts",
           "data": "#f57c00",
           "label": "front line before the Brusilov Offensive, 4 June 1916"
       },
       {
           "kind": "line",
           "swatch": "#fbc02d",
           "border": "",
           "layer": "fronts",
           "data": "#fbc02d",
           "label": "furthest extent of the Brusilov Offensive by September 1916"
       },
       {
           "kind": "line",
           "swatch": "#1976d2",
           "border": "",
           "layer": "fronts",
           "data": "#1976d2",
           "label": "armistice line, 2 December 1917"
       },
       {
           "kind": "line",
           "swatch": "#000000",
           "border": "",
           "layer": "borders",
           "data": "",
           "label": "boundaries of Galicia and Bukovina before WWI"
       }
   ]

}