Map:Map-4.1-1/structure

{

   "layers": [
       {
           "id": "borders",
           "kind": "route",
           "label": "",
           "file": "5_map-4-1-1-germansoviet-demarcation-line/borders.geojson"
       },
       {
           "id": "cities",
           "kind": "route",
           "label": "",
           "file": "5_map-4-1-1-germansoviet-demarcation-line/cities.geojson"
       },
       {
           "id": "line",
           "kind": "route",
           "label": "",
           "file": "5_map-4-1-1-germansoviet-demarcation-line/line.geojson"
       }
   ],
   "legend": [
       {
           "kind": "line",
           "swatch": "#ff0000",
           "border": "#ff0000",
           "layer": "line",
           "data": "#ff0000",
           "label": "German–Soviet demarcation line, 1939–1941"
       },
       {
           "kind": "line",
           "swatch": "#000000",
           "border": "",
           "layer": "borders",
           "data": "",
           "label": "Borders of Galicia before 1918"
       }
   ]

}