如何将键值从json文件组合到geojson映射文件? [英] How to combine key values from a json file to a geojson map file?
本文介绍了如何将键值从json文件组合到geojson映射文件?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试将GeoJSON映射文件与JSON文件中的键值组合在一起,以用于合计映射.
I'm trying to combine a GeoJSON map file with key values from a JSON file to use for a choropleth map.
这是文件的样子:
{
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"properties": {
"STATE": "06",
"ZIPCODE": "94601"
},
"geometry": {
"type": "Polygon",
"coordinates": [...]
}
},
{
"type": "Feature",
"properties": {
"STATE": "06",
"ZIPCODE": "94501"
},
"geometry": {
"type": "Polygon",
"coordinates": [...]
}
}
]
}
data2.json
{
"94501": {
"crime": 172,
"income": 9456,
},
"94601": {
"crime": 118,
"income": 28097,
}
这就是我想要的组合对象的样子:
Here's what I'd like the combined object to look like:
{
"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": [...]
}
}
]
}
当前,我的代码如下:
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);
}
})
}
})
})
这使我接近想要的东西,但我想保留data1.json
中显示的GeoJSON地图格式.
This gets me close to what I want, but I'd like to retain the GeoJSON map format shown in data1.json
.
推荐答案
您可以在features数组上循环并检查data2
上的zipcode
值(如果存在),将其添加到各个元素的属性中
You can loop on features array and check for zipcode
values on data2
if it's there add it's to respective element's properties
let obj = {"type": "FeatureCollection","features": [{"type": "Feature","properties": {"STATE": "06","ZIPCODE": "94601"},"geometry": {"type": "Polygon","coordinates": "[...]"}},{"type": "Feature","properties": {"STATE": "06","ZIPCODE": "94501"},"geometry": {"type": "Polygon","coordinates": "[...]"}}]}
let data2 = {"94501": {"crime": 172,"income": 9456,},"94601": {"crime": 118,"income": 28097,}}
obj.features.forEach(val => {
let { properties } = val
let newProps = data2[properties.ZIPCODE]
val.properties = { ...properties, ...newProps }
})
console.log(obj)
这篇关于如何将键值从json文件组合到geojson映射文件?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文