演示如下：

wxml

<map id="map"  scale="{{scale}}" controls="{{controls}}" bindcontroltap="controltap" markers="{{markers}}" bindmarkertap="markertap" bindregionchange="regionchange" show-location style="width: 100%; height: 580px;"></map>

js

let hospitalData = require('hospitalData')
Page({
  data: {
    centerX: 0.0,
    centerY: 0.0,
    //可能我标识的地点和你所在区域比较远，缩放比例建议5;
    scale:15,
    markers: [],
    controls: [{
      id: 1,
      iconPath: '/image/location-control.png',
      position: {
        left: 0,
        top: 10,
        width: 40,
        height: 40
      },
      clickable: true
    }]
  },
  onReady: function(e) {
    // 使用 wx.createMapContext 获取 map 上下文 
    this.mapCtx = wx.createMapContext('myMap')
  },

  onLoad: function() {
    console.log('地图定位！')
    let that = this
    wx.getLocation({
      type: 'gcj02', //返回可以用于wx.openLocation的经纬度
      success: (res) => {
        let latitude = res.latitude;
        let longitude = res.longitude;
        let marker = this.createMarker(res);
        this.setData({
          centerX: longitude,
          centerY: latitude,
          markers: this.getHospitalMarkers()
        })
      }
    });
  },

  /**
   * 标示点移动触发
   */
  regionchange(e) {
    console.log(e.type)
  },

  /**
   * 点击标识点触发
   */
  markertap(e) {
    console.log(e)
  },

  /**
   * control控件点击时间
   */
  controltap(e) {
    console.log(e.controlId)
    this.moveToLocation()
  },


  /**
   * 获取医院标识
   */
  getHospitalMarkers() {
    let markers = [];
    for (let item of hospitalData) {
      let marker = this.createMarker(item);
      markers.push(marker)
    }
    return markers;
  },

  /**
   * 移动到自己位置
   */
  moveToLocation: function() {
    let mpCtx = wx.createMapContext("map");
    mpCtx.moveToLocation();
  },


  /**
   * 还有地图标识，可以在name上面动手
   */
  createMarker(point) {
    let latitude = point.latitude;
    let longitude = point.longitude;
    let marker = {
      iconPath: "/image/location.png",
      id: point.id || 0,
      name: point.name || '',
      latitude: latitude,
      longitude: longitude,
      width: 25,
      height: 48
    };
    return marker;
  }
})

hospitalData.js （模拟数据）

module.exports = [{
    "id": 1,
    "name": "永州市中心医院",
    "longitude": "111.62852107566833",
    "latitude": "26.42142999357519"
  },
  {
    "id": 2,
    "name": "永州市中医院",
    "longitude": "111.5972679762268",
    "latitude": "26.44470581245983"
  }
]