Snippet showing the layer definition function

getLayerDefinitionSnipped.js

getFireLayerDefinition: function(){
    var defn = {
      "geometryType": "esriGeometryPoint",
      "objectIdField": "objectid",
      "spatialReference":{"wkid":102100},
      "drawingInfo": {
        "renderer": {
          "type": "simple",
          "symbol": {
            "type": "esriPMS",
            "url": "images/icon28-active.png",
            "contentType": "image/png",
            "width": 15,
            "height": 15
          }
        }
      },
      "fields":[
          {"name":"objectid","type":"esriFieldTypeOID","alias":"objectid"},
          {"name":"fire_name","type":"esriFieldTypeString","alias":"fire_name","length":30},
          {"name":"active","type":"esriFieldTypeString","alias":"active","length":50},
          {"name":"start_date","type":"esriFieldTypeString","alias":"start_date","length":18},
          {"name":"start_hour","type":"esriFieldTypeString","alias":"start_hour","length":4},
          {"name":"location","type":"esriFieldTypeString","alias":"location","length":80},
          {"name":"inc_type","type":"esriFieldTypeString","alias":"inc_type","length":3},
          {"name":"cause","type":"esriFieldTypeString","alias":"cause","length":1},
          {"name":"area_","type":"esriFieldTypeDouble","alias":"area_"},
          {"name":"area_meas","type":"esriFieldTypeString","alias":"area_meas","length":10
          }]
    }; 
    return defn;
}