Javascript код для геолокации с примером openlayer - PullRequest
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Javascript код для геолокации с примером openlayer

0 голосов
/ 23 февраля 2019

Я хотел бы попрактиковаться в примерах геолокации на openlayers.org.В этом примере позиция пользователя показана на карте.Карта - это OSM.В этом примере библиотека OpenLayer импортируется.Но я хочу использовать тег script.И сделать это без добавления библиотек.Я изменил коды.Но позиция пользователя не отображается. В чем проблема с кодом, который я изменил?Следующие коды показаны в примере и код, который я изменил.Результаты представлены на рисунках.

Код открытого слоя: 

<!DOCTYPE html>
<html>
  <head>
    <title>Geolocation</title>
    <link rel="stylesheet" href="https://openlayers.org/en/v5.3.0/css/ol.css" type="text/css">
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>

  </head>
  <body>
    <div id="map" class="map"></div>
    <div id="info" style="display: none;"></div>
    <label for="track">
      track position
      <input id="track" type="checkbox"/>
    </label>
    <p>
      position accuracy : <code id="accuracy"></code>&nbsp;&nbsp;
      altitude : <code id="altitude"></code>&nbsp;&nbsp;
      altitude accuracy : <code id="altitudeAccuracy"></code>&nbsp;&nbsp;
      heading : <code id="heading"></code>&nbsp;&nbsp;
      speed : <code id="speed"></code>
    </p>
    <script>
      import Feature from 'ol/Feature.js';
      import Geolocation from 'ol/Geolocation.js';
      import Map from 'ol/Map.js';
      import View from 'ol/View.js';
      import Point from 'ol/geom/Point.js';
      import {Tile as TileLayer, Vector as VectorLayer} from 'ol/layer.js';
      import {OSM, Vector as VectorSource} from 'ol/source.js';
      import {Circle as CircleStyle, Fill, Stroke, Style} from 'ol/style.js';

      var view = new View({
        center: [0, 0],
        zoom: 2
      });

      var map = new Map({
        layers: [
          new TileLayer({
            source: new OSM()
          })
        ],
        target: 'map',
        view: view
      });

      var geolocation = new Geolocation({
        // enableHighAccuracy must be set to true to have the heading value.
        trackingOptions: {
          enableHighAccuracy: true
        },
        projection: view.getProjection()
      });

      function el(id) {
        return document.getElementById(id);
      }

      el('track').addEventListener('change', function() {
        geolocation.setTracking(this.checked);
      });

      // update the HTML page when the position changes.
      geolocation.on('change', function() {
        el('accuracy').innerText = geolocation.getAccuracy() + ' [m]';
        el('altitude').innerText = geolocation.getAltitude() + ' [m]';
        el('altitudeAccuracy').innerText = geolocation.getAltitudeAccuracy() + ' [m]';
        el('heading').innerText = geolocation.getHeading() + ' [rad]';
        el('speed').innerText = geolocation.getSpeed() + ' [m/s]';
      });

      // handle geolocation error.
      geolocation.on('error', function(error) {
        var info = document.getElementById('info');
        info.innerHTML = error.message;
        info.style.display = '';
      });

      var accuracyFeature = new Feature();
      geolocation.on('change:accuracyGeometry', function() {
        accuracyFeature.setGeometry(geolocation.getAccuracyGeometry());
      });

      var positionFeature = new Feature();
      positionFeature.setStyle(new Style({
        image: new CircleStyle({
          radius: 6,
          fill: new Fill({
            color: '#3399CC'
          }),
          stroke: new Stroke({
            color: '#fff',
            width: 2
          })
        })
      }));

      geolocation.on('change:position', function() {
        var coordinates = geolocation.getPosition();
        positionFeature.setGeometry(coordinates ?
          new Point(coordinates) : null);
      });

      new VectorLayer({
        map: map,
        source: new VectorSource({
          features: [accuracyFeature, positionFeature]
        })
      });
    </script>
  </body>
</html>

Результат введите описание изображения здесь

мой код: 

<!DOCTYPE html>
<html>
  <head>
    <title>Geolocation</title>
    <link rel="stylesheet" href="https://openlayers.org/en/v5.3.0/css/ol.css" type="text/css">
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    
    <script src="https://cdn.rawgit.com/openlayers/openlayers.github.io/master/en/v5.3.0/build/ol.js"></script>
  </head>
  <body>
    <div id="map" class="map"></div>
    <div id="info" style="display: none;"></div>
    <label for="track">
      track position
      <input id="track" type="checkbox"/>
    </label>
    <p>
	positionshowingtouser: <code id="positionshowingtouser1"></code>&nbsp;&nbsp;
      position accuracy : <code id="accuracy"></code>&nbsp;&nbsp;
      altitude : <code id="altitude"></code>&nbsp;&nbsp;
      altitude accuracy : <code id="altitudeAccuracy"></code>&nbsp;&nbsp;
      heading : <code id="heading"></code>&nbsp;&nbsp;
      speed : <code id="speed"></code>
    </p>
	<button onclick="showPosition1()">Try It</button>

    <p id="demo"></p>
    <script>
      /*import Feature from 'ol/Feature.js';
      import Geolocation from 'ol/Geolocation.js';
      import Map from 'ol/Map.js';
      import View from 'ol/View.js';
      import Point from 'ol/geom/Point.js';
      import {Tile as TileLayer, Vector as VectorLayer} from 'ol/layer.js';
      import {OSM, Vector as VectorSource} from 'ol/source.js';
      import {Circle as CircleStyle, Fill, Stroke, Style} from 'ol/style.js';*/

      var view = new ol.View({
        center: ol.proj.fromLonLat([51.3, 35.6]),
          zoom: 10
      });

      var map = new ol.Map({
        layers: [
          new ol.layer.Tile({
            source: new ol.source.OSM()
          })
        ],
        target: 'map',
        view: view
      });

      var geolocation = new ol.Geolocation({
        // enableHighAccuracy must be set to true to have the heading value.
        trackingOptions: {
          enableHighAccuracy: true
        },
        projection: view.getProjection()
      });

      function el(id) {
        return document.getElementById(id);
      }

      el('track').addEventListener('change', function() {
        geolocation.setTracking(this.checked);
      });

      // update the HTML page when the position changes.
      geolocation.on('change', function() {
	    el('positionshowingtouser1').innerText = geolocation.getPosition();
        el('accuracy').innerText = geolocation.getAccuracy() + ' [m]';
        el('altitude').innerText = geolocation.getAltitude() + ' [m]';
        el('altitudeAccuracy').innerText = geolocation.getAltitudeAccuracy() + ' [m]';
        el('heading').innerText = geolocation.getHeading() + ' [rad]';
        el('speed').innerText = geolocation.getSpeed() + ' [m/s]';
      });

      // handle geolocation error.
      geolocation.on('error', function(error) {
        var info = document.getElementById('info');
        info.innerHTML = error.message;
        info.style.display = '';
      });

      var accuracyFeature = new ol.Feature();
      geolocation.on('change:accuracyGeometry', function() {
        accuracyFeature.setGeometry(geolocation.getAccuracyGeometry());
      });

      var positionFeature = new ol.Feature();
      positionFeature.setStyle(new Style({
        image: new ol.style.Circle({
          radius: 6,
          fill: new ol.style.Fill({
            color: '#3399CC'
          }),
          stroke: new ol.style.Stroke({
            color: '#fff',
            width: 2
          })
        })
      }));

      geolocation.on('change:position', function() {
        var coordinates = geolocation.getPosition();
        positionFeature.setGeometry(coordinates ?
          new ol.geom.Point(coordinates) : null);
      });

      new ol.layer.Vector({
        map: map,
        source: new ol.source.VectorSource({
          features: [accuracyFeature, positionFeature]
        })
      });
	 
    </script>
  </body>
</html>

Результат введите описание изображения здесь

Ответы [ 2 ]

0 голосов
/ 24 февраля 2019

В вашем обновлении кода есть синтаксические ошибки:

  1. строка 92: Uncaught ReferenceError: Style is not defined (должно быть ol.style.Style)

  2. строка 113: Uncaught TypeError: ol.source.VectorSource is not a constructor (должно быть ol.source.Vector)

Тогда это работает (если оно находится на моем локальном компьютере или защищенном сервере [https:]).

живая версия 

<!DOCTYPE html>
<html>
  <head>
    <title>Geolocation</title>
    <link rel="stylesheet" href="https://openlayers.org/en/v5.3.0/css/ol.css" type="text/css">
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    
    <script src="https://cdn.rawgit.com/openlayers/openlayers.github.io/master/en/v5.3.0/build/ol.js"></script>
  </head>
  <body>
    <div id="map" class="map"></div>
    <div id="info" style="display: none;"></div>
    <label for="track">
      track position
      <input id="track" type="checkbox"/>
    </label>
    <p>
	positionshowingtouser: <code id="positionshowingtouser1"></code>&nbsp;&nbsp;
      position accuracy : <code id="accuracy"></code>&nbsp;&nbsp;
      altitude : <code id="altitude"></code>&nbsp;&nbsp;
      altitude accuracy : <code id="altitudeAccuracy"></code>&nbsp;&nbsp;
      heading : <code id="heading"></code>&nbsp;&nbsp;
      speed : <code id="speed"></code>
    </p>
	<button onclick="showPosition1()">Try It</button>

    <p id="demo"></p>
    <script>
      /*import Feature from 'ol/Feature.js';
      import Geolocation from 'ol/Geolocation.js';
      import Map from 'ol/Map.js';
      import View from 'ol/View.js';
      import Point from 'ol/geom/Point.js';
      import {Tile as TileLayer, Vector as VectorLayer} from 'ol/layer.js';
      import {OSM, Vector as VectorSource} from 'ol/source.js';
      import {Circle as CircleStyle, Fill, Stroke, Style} from 'ol/style.js';*/

      var view = new ol.View({
        center: ol.proj.fromLonLat([51.3, 35.6]),
          zoom: 10
      });

      var map = new ol.Map({
        layers: [
          new ol.layer.Tile({
            source: new ol.source.OSM()
          })
        ],
        target: 'map',
        view: view
      });

      var geolocation = new ol.Geolocation({
        // enableHighAccuracy must be set to true to have the heading value.
        trackingOptions: {
          enableHighAccuracy: true
        },
        projection: view.getProjection()
      });

      function el(id) {
        return document.getElementById(id);
      }

      el('track').addEventListener('change', function() {
        geolocation.setTracking(this.checked);
      });

      // update the HTML page when the position changes.
      geolocation.on('change', function() {
	    el('positionshowingtouser1').innerText = geolocation.getPosition();
        el('accuracy').innerText = geolocation.getAccuracy() + ' [m]';
        el('altitude').innerText = geolocation.getAltitude() + ' [m]';
        el('altitudeAccuracy').innerText = geolocation.getAltitudeAccuracy() + ' [m]';
        el('heading').innerText = geolocation.getHeading() + ' [rad]';
        el('speed').innerText = geolocation.getSpeed() + ' [m/s]';
      });

      // handle geolocation error.
      geolocation.on('error', function(error) {
        var info = document.getElementById('info');
        info.innerHTML = error.message;
        info.style.display = '';
      });

      var accuracyFeature = new ol.Feature();
      geolocation.on('change:accuracyGeometry', function() {
        accuracyFeature.setGeometry(geolocation.getAccuracyGeometry());
      });

      var positionFeature = new ol.Feature();
      positionFeature.setStyle(new ol.style.Style({
        image: new ol.style.Circle({
          radius: 6,
          fill: new ol.style.Fill({
            color: '#3399CC'
          }),
          stroke: new ol.style.Stroke({
            color: '#fff',
            width: 2
          })
        })
      }));

      geolocation.on('change:position', function() {
        var coordinates = geolocation.getPosition();
        positionFeature.setGeometry(coordinates ?
          new ol.geom.Point(coordinates) : null);
      });

      new ol.layer.Vector({
        map: map,
        source: new ol.source.Vector({
          features: [accuracyFeature, positionFeature]
        })
      });
	 
    </script>
  </body>
</html>
0 голосов
/ 24 февраля 2019

Для геолокации без библиотеки вы можете использовать navigator.geolocation.watchPosition() https://developer.mozilla.org/en-US/docs/Web/API/Geolocation/watchPosition

<!DOCTYPE html>
<html>
  <head>
  </head>
  <body>
    <button onclick="getLocation()">Try It</button>
    <p id="result"></p>
    <script>

      var result = document.getElementById("result");

      function getLocation() {
        if (navigator.geolocation) {
          navigator.geolocation.watchPosition(showPosition, null, { enableHighAccuracy: true });
        } else { 
          x.innerHTML = "Geolocation is not supported by this browser.";
        }
      }

      function showPosition(position) {
        result.innerHTML = "latitude: " + position.coords.latitude + 
          "<br>longitude: " + position.coords.longitude +
          "<br>position accuracy: " + position.coords.accuracy + " [m]" +
          "<br>altitude: " + position.coords.altitude + " [m]" +
          "<br>altitude accuracy: " + position.coords.altitudeAccuracy + " [m]" +
          "<br>heading: " + position.coords.heading + " [degrees]" +
          "<br>speed: " + position.coords.speed + " [m/s]";
      }

    </script>
  </body>
</html>
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