Location.avsc

{
    "namespace": "com.github.jeroenr.rain.radar",
    "type": "record",
    "name": "Location",
    "fields":[
         {
            "name": "lat", "type": "double"
         },
         {
            "name": "lng", "type": "double"
         },
         {
            "name": "city", "type": "string"
         }
    ]
}