Javascript 如何将json文件中的键值组合到geojson映射文件中？

我正在尝试将GeoJSON映射文件与JSON文件中的键值组合起来，以用于choropleth映射

以下是文件的外观：

{
    "type": "FeatureCollection",
    "features": [
        {
            "type": "Feature",
            "properties": {
                "STATE": "06",
                "ZIPCODE": "94601",
                "crime": 118,
                "income": 28097
            },
            "geometry": {
                "type": "Polygon",
                "coordinates": [...]
            }
        },
        {
            "type": "Feature",
            "properties": {
                "STATE": "06",
                "ZIPCODE": "94501",
                "crime": 172,
                "income": 9456
            },
            "geometry": {
                "type": "Polygon",
                "coordinates": [...]
            }
        }
    ]
}

data1.json data2.json 下面是我希望组合对象的外观：

{
    "type": "FeatureCollection",
    "features": [
        {
            "type": "Feature",
            "properties": {
                "STATE": "06",
                "ZIPCODE": "94601",
                "crime": 118,
                "income": 28097
            },
            "geometry": {
                "type": "Polygon",
                "coordinates": [...]
            }
        },
        {
            "type": "Feature",
            "properties": {
                "STATE": "06",
                "ZIPCODE": "94501",
                "crime": 172,
                "income": 9456
            },
            "geometry": {
                "type": "Polygon",
                "coordinates": [...]
            }
        }
    ]
}

目前，我的代码如下所示：

d3.json("data1.json", function (geoData) {
    d3.json("data2.json", function (zipdata) {

        var geoFeatures = geoData.features;

        for (var i = 0; i < geoFeatures.length; i++) {
            Object.keys(zipdata).forEach(function (key) {
                if (geoFeatures[i].properties.ZIPCODE == key) {
                    var combined = Object.assign({}, geoFeatures[i], zipdata[key]);
                    console.log(combined);
                }
            })
        }
    })
})

---

这使我接近我想要的，但我希望保留data1.json中显示的GeoJSON映射格式。

您可以在features数组上循环并检查data2上的zipcode值（如果有），将其添加到相应元素的属性中

设obj={type:FeatureCollection，features:[{type:Feature，properties:{STATE:06，ZIPCODE:94601}，geometry:{type:Polygon，坐标：[……]}，{type:Feature，properties:{STATE:06，ZIPCODE:94501}，geometry:{type:Polygon，坐标：[……]} 让数据2={94501:{犯罪：172，收入：9456，}，94601:{犯罪：118，收入：28097，} obj.features.forEachval=>{ 设{properties}=val 让newProps=data2[properties.ZIPCODE] val.properties={…properties，…newProps} }

---

logobj您可以在features数组上循环并检查data2上的zipcode值（如果有），并将其添加到相应元素的属性中

设obj={type:FeatureCollection，features:[{type:Feature，properties:{STATE:06，ZIPCODE:94601}，geometry:{type:Polygon，坐标：[……]}，{type:Feature，properties:{STATE:06，ZIPCODE:94501}，geometry:{type:Polygon，坐标：[……]} 让数据2={94501:{犯罪：172，收入：9456，}，94601:{犯罪：118，收入：28097，} obj.features.forEachval=>{ 设{properties}=val 让newProps=data2[properties.ZIPCODE] val.properties={…properties，…newProps} } console.logobj试试这个：

让data1={type:FeatureCollection，features:[{type:Feature，properties:{STATE:06，ZIPCODE:94601}，geometry:{type:Polygon，座标：[……]}，{type:Feature，properties:{STATE:06，ZIPCODE:94501}，geometry:{type:Polygon，座标：[……]} 让数据2={94501:{犯罪：172，收入：9456，}，94601:{犯罪：118，收入：28097，} data1.features.mapres=>Object.assignres{ 特性：{ …物属性， …数据2[res.properties.ZIPCODE] } } console.logdata1试试这个：

让data1={type:FeatureCollection，features:[{type:Feature，properties:{STATE:06，ZIPCODE:94601}，geometry:{type:Polygon，座标：[……]}，{type:Feature，properties:{STATE:06，ZIPCODE:94501}，geometry:{type:Polygon，座标：[……]} 让数据2={94501:{犯罪：172，收入：9456，}，94601:{犯罪：118，收入：28097，} data1.features.mapres=>Object.assignres{ 特性：{ …物属性， …数据2[res.properties.ZIPCODE] } } console.logdata1

d3.json("data1.json", function (geoData) {
    d3.json("data2.json", function (zipdata) {

        var geoFeatures = geoData.features;

        for (var i = 0; i < geoFeatures.length; i++) {
            Object.keys(zipdata).forEach(function (key) {
                if (geoFeatures[i].properties.ZIPCODE == key) {
                    var combined = Object.assign({}, geoFeatures[i], zipdata[key]);
                    console.log(combined);
                }
            })
        }
    })
})