用vue编写大数据地图

大数据地图可以用vue的地图组件和数据可视化库来实现。以下是一个简单的示例。

1. 安装vue和地图组件

npm install vue vue2-google-maps

2. 在vue中引入地图组件和数据可视化库

<template>
  <div>
    <GmapMap :center="center" :zoom="zoom">
      <GmapMarker v-for="(marker, index) in markers" :key="index" :position="marker.position" />
    </GmapMap>
  </div>
</template>

<script>
import { gmapApi } from 'vue2-google-maps'
import * as d3 from 'd3'

export default {
  data() {
    return {
      center: { lat: 37.7749, lng: -122.4194 },
      zoom: 12,
      markers: []
    }
  },
  mounted() {
    // 获取数据
    d3.json('data.json').then(data => {
      this.markers = data.map(item => {
        return {
          position: {
            lat: item.latitude,
            lng: item.longitude
          }
        }
      })
    })
  },
  components: {
    GmapMap: gmapApi().then(() => import('vue2-google-maps/dist/components/map')),
    GmapMarker: gmapApi().then(() => import('vue2-google-maps/dist/components/marker'))
  }
}
</script>

3. 在数据可视化库中绘制图表

<template>
  <div>
    <GmapMap :center="center" :zoom="zoom" ref="map">
      <GmapMarker v-for="(marker, index) in markers" :key="index" :position="marker.position" />
    </GmapMap>
    <div ref="chart"></div>
  </div>
</template>

<script>
import { gmapApi } from 'vue2-google-maps'
import * as d3 from 'd3'
import * as d3GeoProjection from 'd3-geo-projection'

export default {
  data() {
    return {
      center: { lat: 37.7749, lng: -122.4194 },
      zoom: 12,
      markers: []
    }
  },
  mounted() {
    // 获取数据
    d3.json('data.json').then(data => {
      this.markers = data.map(item => {
        return {
          position: {
            lat: item.latitude,
            lng: item.longitude
          }
        }
      })

      // 绘制图表
      const width = 600
      const height = 400
      const svg = d3.select(this.$refs.chart)
        .append('svg')
        .attr('width', width)
        .attr('height', height)

      const projection = d3GeoProjection.geoMercator()
        .center([-122.4194, 37.7749])
        .translate([width / 2, height / 2])
        .scale(400000)

      const path = d3.geoPath().projection(projection)

      svg.selectAll('path')
        .data(data)
        .enter()
        .append('path')
        .attr('fill', '#ccc')
        .attr('stroke', '#333')
        .attr('stroke-width', 1)
        .attr('d', path)
    })
  },
  components: {
    GmapMap: gmapApi().then(() => import('vue2-google-maps/dist/components/map')),
    GmapMarker: gmapApi().then(() => import('vue2-google-maps/dist/components/marker'))
  }
}
</script>