json文件格式为{"y":115.9041400,"x":29.1664300,"label":0},用flask将聚类python代码传给前端leaflet绘制轨迹聚类图
时间: 2023-11-03 16:50:04 浏览: 85
下面是一个简单的示例代码,可以将聚类结果以json格式传递给前端leaflet进行绘制轨迹聚类图。
```python
from flask import Flask, jsonify
import json
app = Flask(__name__)
# 假设聚类结果为以下形式
clusters = [
[{"y": 115.90414, "x": 29.16643, "label": 0},
{"y": 115.90415, "x": 29.16644, "label": 0},
{"y": 115.90416, "x": 29.16645, "label": 0}],
[{"y": 115.90314, "x": 29.16543, "label": 1},
{"y": 115.90315, "x": 29.16544, "label": 1},
{"y": 115.90316, "x": 29.16545, "label": 1}]
]
@app.route('/')
def index():
# 将聚类结果转为json格式
data = json.dumps({"clusters": clusters})
return jsonify(data)
if __name__ == '__main__':
app.run(debug=True)
```
前端leaflet代码可以参考如下示例:
```javascript
$.getJSON('/').done(function(data) {
data = JSON.parse(data);
var map = L.map('map').setView([29.16643, 115.90414], 15);
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
attribution: 'Map data © OpenStreetMap contributors'
}).addTo(map);
// 循环绘制每个聚类簇
for (var i = 0; i < data.clusters.length; i++) {
var cluster = data.clusters[i];
var latlngs = [];
for (var j = 0; j < cluster.length; j++) {
var point = cluster[j];
latlngs.push([point.x, point.y]);
}
L.polyline(latlngs, {color: getColor(cluster[0].label)}).addTo(map);
}
});
function getColor(label) {
var colors = ['red', 'blue', 'green', 'orange', 'purple'];
return colors[label % colors.length];
}
```
这段代码使用了leaflet的polyline函数,循环绘制每个聚类簇的轨迹,并根据标签确定颜色。
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