重：象征符号比例由单张

我试图在互动地图上重新归一化的象征符号成正比原始比例符号调用一个函数（传单）重：象征符号比例由单张

//Step 2: Import GeoJSON data 
function getData(map){ 
    //load the data 
    $.ajax("data/PropRaw2001_2013.geojson", { 
     dataType: "json", 
     success: function(response){ 

      //create an attributes array 
      var attributes = processData(response); 
      var rawAttributes = processRawData(response); 

function processData(data){ 
    //empty array to hold attributes 
    var attributes = []; 

    //properties of the first feature in the dataset 
    var properties = data.features[0].properties; 

    //push each attribute name into attributes array 
    for (var attribute in properties){ 
     //only take attributes with population values 
     if (attribute.indexOf("Prop") > -1){ 
      attributes.push(attribute); 
     }; 
    }; 

    //check result 
    console.log("these are the attributes") 
    console.log(attributes); 

    return attributes; 
}; 

function processRawData(data){ 
    console.log("Raw data") 
    //empty array to hold attributes 
    var rawAttributes = []; 
    console.log(rawAttributes) 
    //properties of the first feature in the dataset 
    var properties = data.features[0].properties; 

    //push each attribute name into attributes array 
    for (var rawAttribute in properties){ 
     //only take attributes with population values 
     if (rawAttribute.indexOf("Raw") > -1){ 
      rawAttributes.push(rawAttribute); 
      console.log(rawAttributes) 
     }; 
    };

这里，是函数，将更新我的比例符号大小：

function updatePropSymbols(map, attribute){ 
    map.eachLayer(function(layer){ 
     //Example 3.16 line 4 
     if (layer.feature && layer.feature.properties[attribute]){ 
      //access feature properties 
      var props = layer.feature.properties; 

      //update each feature's radius based on new attribute values 
      var radius = calcPropRadius(props[attribute]); 
      layer.setRadius(radius); 

      //add city to popup content string 
      var popupContent = "<p><b>City:</b> " + props.City + "</p>"; 

      //add formatted attribute to panel content string 
      var year = attribute.split("_")[1]; 
      popupContent += "<p><b>Population in " + year + ":</b> " + props[attribute] + " million</p>"; 

      //replace the layer popup 
      layer.bindPopup(popupContent, { 
       offset: new L.Point(0,-radius) 
      }); 
     }; 
    }); 
};

我添加了两个按钮为div的“归”和“生”，我希望用户能够使用标准化的原始，使用以下功能之间切换：

$("#Normalized").click(function(attribute){ 
      console.log("normalize function") 
      //normalize = true 
      //if (normalize = true) { 

       updatePropSymbols(map, attribute); 
      //} 
     }); 
// 
$("#Raw").click(function(rawAttribute){ 
      //normalize = false 
      //if (normalize = false){ 
       updatePropSymbols(map, rawAttribute); 
      //} 
    });

但它没有传递属性数据。看起来我无法用rawAttribute或attribute（这是规范化的）调用updatePropSymbols。谁能帮我吗？对不起，这么长的代码！

来源

2016-03-04 DiamondJoe12

通过使用attribute和rawAttribute为你的点击处理函数的参数，你实际上是在创造新的局部变量（在这种情况下，他们是jQuery的eventObjects说明click事件）将被用来代替原来的attribute和rawAttribute变量。假设你在别处定义这些变量，你要的是这样的：

$("#Normalized").click(function(){ 
    updatePropSymbols(map, attribute); 
}); 

$("#Raw").click(function(){ 
    updatePropSymbols(map, rawAttribute); 
});

这里是说明一个简单的例子：http://jsfiddle.net/nathansnider/zhLLydcr/

来源

2016-03-04 21:22:54 nathansnider

重：象征符号比例由单张

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