GeoSerie.fromJson constructor
Make a GeoSerie from json data
Implementation
GeoSerie.fromJson(Map<String, dynamic> json)
: name = "${json["name"]}",
id = int.parse("${json["id"]}"),
surface = double.tryParse("${json["surface"]}"),
type = _typeFromString("${json["type"]}"),
this.geoPoints = <GeoPoint>[];