Question

我想知道来自地理服务器的地图如何迭代并显示包含信息的弹出窗口。请，有人可以在jsfiddle做一些事情，所以我可以理解，因为我无法弄清楚如何做到这一点。基本上这就是我想要的，带来一层地理服务器，并能够从每个部分的弹出窗口获取信息。我的代码就是这样：

var stComerciaisLayer= L.tileLayer.wms("http://...:8080/geoserver/wms/", {
          layers: 'IGEO:setor_comercial_geo',
          format: 'image/png',
          transparent: true,
          attribution: "Test"
        });

我怎么放弹出窗口？谢谢！

我完全复制了这个：

http://bl.ocks.org/rclark/6908938

但是不行：

<script src="L.TileLayer.BetterWMS.js"></script>

var stComerciaisLayer= L.tileLayer.betterWms("http://...:8080/geoserver/wms/", {
          layers: 'IGEO:setor_comercial_geo',
          format: 'image/png',
          transparent: true,
          attribution: "Some test"
        });

L.TileLayer.BetterWMS.js

L.TileLayer.BetterWMS = L.TileLayer.WMS.extend({

  onAdd: function (map) {
    // Triggered when the layer is added to a map.
    //   Register a click listener, then do all the upstream WMS things
    L.TileLayer.WMS.prototype.onAdd.call(this, map);
    map.on('click', this.getFeatureInfo, this);
  },

  onRemove: function (map) {
    // Triggered when the layer is removed from a map.
    //   Unregister a click listener, then do all the upstream WMS things
    L.TileLayer.WMS.prototype.onRemove.call(this, map);
    map.off('click', this.getFeatureInfo, this);
  },

  getFeatureInfo: function (evt) {
    // Make an AJAX request to the server and hope for the best
    var url = this.getFeatureInfoUrl(evt.latlng),
        showResults = L.Util.bind(this.showGetFeatureInfo, this);
    $.ajax({
      url: url,
      success: function (data, status, xhr) {
        var err = typeof data === 'string' ? null : data;
        showResults(err, evt.latlng, data);
      },
      error: function (xhr, status, error) {
        showResults(error);  
      }
    });
  },

  getFeatureInfoUrl: function (latlng) {
    // Construct a GetFeatureInfo request URL given a point
    var point = this._map.latLngToContainerPoint(latlng, this._map.getZoom()),
        size = this._map.getSize(),

        params = {
          request: 'GetFeatureInfo',
          service: 'WMS',
          srs: 'EPSG:4326',
          styles: this.wmsParams.styles,
          transparent: this.wmsParams.transparent,
          version: this.wmsParams.version,      
          format: this.wmsParams.format,
          bbox: this._map.getBounds().toBBoxString(),
          height: size.y,
          width: size.x,
          layers: this.wmsParams.layers,
          query_layers: this.wmsParams.layers,
          info_format: 'application/json'
        };

    params[params.version === '1.3.0' ? 'i' : 'x'] = point.x;
    params[params.version === '1.3.0' ? 'j' : 'y'] = point.y;

    return this._url + L.Util.getParamString(params, this._url, true);
  },

  showGetFeatureInfo: function (err, latlng, content) {
    if (err) { console.log(err); return; } // do nothing if there's an error

    // Otherwise show the content in a popup, or something.
    L.popup({ maxWidth: 800})
      .setLatLng(latlng)
      .setContent(content)
      .openOn(this._map);
  }
});

L.tileLayer.betterWms = function (url, options) {
  return new L.TileLayer.BetterWMS(url, options);  
};

错误：

Failed to load http://...:8080/geoserver/wms/?REQUEST=GetFeatureInfo&SERVICE=WMS&SRS=EPSG%3A4326&STYLES=&TRANSPARENT=true&VERSION=1.1.1&FORMAT=image%2Fpng&BBOX=-38.74431610107422%2C-4.0605082148574105%2C-38.26400756835938%2C-3.726884196645965&HEIGHT=974&WIDTH=1399&LAYERS=IGEO%3Asetor_comercial_geo&QUERY_LAYERS=IGEO%3Asetor_comercial_geo&INFO_FORMAT=application%2Fjson&X=821&Y=172: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost' is therefore not allowed access.



leaflet.js:5 Uncaught TypeError: Cannot read property 'lat' of undefined

Answer 1

您显示的错误消息大约是CORS。

它表示您的服务器（geoserver）未配置为发送CORS标头，因此您的浏览器拒绝从该服务器加载数据，并坚持使用Same-origin policy。

您应该有足够的资源来配置地理服务器的CORS标头，包括SO或GIS Stack Exchange上的CORS标头，例如： CORS - Tomcat - Geoserver

弹出窗口使用WMS与Leaflet

1 个答案: