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Request a Ajax with GET to remove one or more geometries in OpenLayers


Problems with features, popups and strategy with OpenLayersOpenLayers2: Showing WKT data via JSON from MVCOpenlayers 3, jquery Ajax initialising in Jquery.success()Request JSONP from Geoserver using AJAX request in Openlayers 3Save JSON from Openlayers using AJAXMarkerCluster don't work with geojson layer in leafletOpenLayers 4 server data not displaying but same file data displaysError loading geoJSON into map using OpenLayers v4.2.0Get GeoJSON from a database by the AJAX method for OpenLayersWhy is this happening? I show GeoJSON some coordinates with OpenLayers by request Ajax













0















I have a html selection of the form:



<table class="table">
<tr>
<td>
<label>Afiseaza:</label><br />
<select id="layer" onchange="search()" class="form-control">
<option value="Green Area">Teren</option>
<option value="Building">Constructii</option>

</select>
</td>
</tr>
</table>


Here we have a function in js which on an onchange event calls for the following:



function search(){


var layer = $('#layer').val();

console.log(layer);

proj4.defs('EPSG:31700','+proj=sterea +lat_0=46 +lon_0=25 +k=0.99975 +x_0=500000 +y_0=500000 +ellps=krass +towgs84=28,-121,-77,0,0,0,0 +units=m +no_defs');
ol.proj.proj4.register(proj4);

//var geojson = $.getJSON('json/geojson.json', function(data) { return data });
//var geojson1 = {"type":"FeatureCollection","features":[{"type":"Feature","id":"2","geometry":{"type":"LineString","coordinates":[[698282.236,377375.758],[698289.591,377372.136],[698183.88,377182.298],[698182.72,377197.045],[698282.236,377375.758]]},"crs":{"type":"EPSG","properties":{"code":"31700"}},"geometry_name":"wkb_geometry","properties":{"ogc_fid":"2","area_id":"2","building_id":"2","type":"test","area":"test","owner":"test","description":"test","administration":"test","address":"test","property":"test","layer":"Green Area","extendedentity":null,"linetype":"test","entityhandle":null,"text":"test","wkb_geometry":"01020000000500000000FED478544F2541002731087F081741408D972E634F25418195438B70081741295C8FC28F4E254181E92631790517410AD7A3708D4E2541027B142EB405174100FED478544F2541002731087F081741"}}]}



//in cazul in care dorim direct din GeoJson
//$.getJSON('json/geojson.json', processGeoJSON );

//console.log(geojson);

if (ol.proj.proj4 && ol.proj.proj4.register) { ol.proj.proj4.register(proj4); }

var features;


$.ajax({
type: "GET",
url: "get_geojson.php?layer="+layer,
dataType: 'json',
async: false,
success: function (response) {
//console.log(response);
//console.log(b);
features = new ol.format.GeoJSON().readFeatures(response);
}
});


var extent = ol.extent.createEmpty();
features.forEach(function(feature){
feature.setId(undefined);
feature.getGeometry().transform('EPSG:31700', 'EPSG:3857');
ol.extent.extend(extent, feature.getGeometry().getExtent());
});

var map = new ol.Map({
layers: [
new ol.layer.Tile({
source: new ol.source.OSM(),
}),
new ol.layer.Vector({
source: new ol.source.Vector({
features: features
})
})
],
target: 'map',
controls: ol.control.defaults({
attributionOptions:
({
collapsible: false
})
}).extend([
new ol.control.OverviewMap(),
new ol.control.FullScreen(),
new ol.control.ScaleLine()

]),
interactions: [
new ol.interaction.DragRotateAndZoom(),
new ol.interaction.MouseWheelZoom(),
new ol.interaction.DragPan(),
new ol.interaction.DoubleClickZoom()
],
view: new ol.View()
});

map.getView().fit(extent);

}


Which would normally have to refresh the map with new geometries ...



This does not happen does anyone know why this phenomenon is happening?



In the console there is no error, just when the page load is executing the function but when I give the onchange do not ...









share



























    0















    I have a html selection of the form:



    <table class="table">
    <tr>
    <td>
    <label>Afiseaza:</label><br />
    <select id="layer" onchange="search()" class="form-control">
    <option value="Green Area">Teren</option>
    <option value="Building">Constructii</option>

    </select>
    </td>
    </tr>
    </table>


    Here we have a function in js which on an onchange event calls for the following:



    function search(){


    var layer = $('#layer').val();

    console.log(layer);

    proj4.defs('EPSG:31700','+proj=sterea +lat_0=46 +lon_0=25 +k=0.99975 +x_0=500000 +y_0=500000 +ellps=krass +towgs84=28,-121,-77,0,0,0,0 +units=m +no_defs');
    ol.proj.proj4.register(proj4);

    //var geojson = $.getJSON('json/geojson.json', function(data) { return data });
    //var geojson1 = {"type":"FeatureCollection","features":[{"type":"Feature","id":"2","geometry":{"type":"LineString","coordinates":[[698282.236,377375.758],[698289.591,377372.136],[698183.88,377182.298],[698182.72,377197.045],[698282.236,377375.758]]},"crs":{"type":"EPSG","properties":{"code":"31700"}},"geometry_name":"wkb_geometry","properties":{"ogc_fid":"2","area_id":"2","building_id":"2","type":"test","area":"test","owner":"test","description":"test","administration":"test","address":"test","property":"test","layer":"Green Area","extendedentity":null,"linetype":"test","entityhandle":null,"text":"test","wkb_geometry":"01020000000500000000FED478544F2541002731087F081741408D972E634F25418195438B70081741295C8FC28F4E254181E92631790517410AD7A3708D4E2541027B142EB405174100FED478544F2541002731087F081741"}}]}



    //in cazul in care dorim direct din GeoJson
    //$.getJSON('json/geojson.json', processGeoJSON );

    //console.log(geojson);

    if (ol.proj.proj4 && ol.proj.proj4.register) { ol.proj.proj4.register(proj4); }

    var features;


    $.ajax({
    type: "GET",
    url: "get_geojson.php?layer="+layer,
    dataType: 'json',
    async: false,
    success: function (response) {
    //console.log(response);
    //console.log(b);
    features = new ol.format.GeoJSON().readFeatures(response);
    }
    });


    var extent = ol.extent.createEmpty();
    features.forEach(function(feature){
    feature.setId(undefined);
    feature.getGeometry().transform('EPSG:31700', 'EPSG:3857');
    ol.extent.extend(extent, feature.getGeometry().getExtent());
    });

    var map = new ol.Map({
    layers: [
    new ol.layer.Tile({
    source: new ol.source.OSM(),
    }),
    new ol.layer.Vector({
    source: new ol.source.Vector({
    features: features
    })
    })
    ],
    target: 'map',
    controls: ol.control.defaults({
    attributionOptions:
    ({
    collapsible: false
    })
    }).extend([
    new ol.control.OverviewMap(),
    new ol.control.FullScreen(),
    new ol.control.ScaleLine()

    ]),
    interactions: [
    new ol.interaction.DragRotateAndZoom(),
    new ol.interaction.MouseWheelZoom(),
    new ol.interaction.DragPan(),
    new ol.interaction.DoubleClickZoom()
    ],
    view: new ol.View()
    });

    map.getView().fit(extent);

    }


    Which would normally have to refresh the map with new geometries ...



    This does not happen does anyone know why this phenomenon is happening?



    In the console there is no error, just when the page load is executing the function but when I give the onchange do not ...









    share

























      0












      0








      0








      I have a html selection of the form:



      <table class="table">
      <tr>
      <td>
      <label>Afiseaza:</label><br />
      <select id="layer" onchange="search()" class="form-control">
      <option value="Green Area">Teren</option>
      <option value="Building">Constructii</option>

      </select>
      </td>
      </tr>
      </table>


      Here we have a function in js which on an onchange event calls for the following:



      function search(){


      var layer = $('#layer').val();

      console.log(layer);

      proj4.defs('EPSG:31700','+proj=sterea +lat_0=46 +lon_0=25 +k=0.99975 +x_0=500000 +y_0=500000 +ellps=krass +towgs84=28,-121,-77,0,0,0,0 +units=m +no_defs');
      ol.proj.proj4.register(proj4);

      //var geojson = $.getJSON('json/geojson.json', function(data) { return data });
      //var geojson1 = {"type":"FeatureCollection","features":[{"type":"Feature","id":"2","geometry":{"type":"LineString","coordinates":[[698282.236,377375.758],[698289.591,377372.136],[698183.88,377182.298],[698182.72,377197.045],[698282.236,377375.758]]},"crs":{"type":"EPSG","properties":{"code":"31700"}},"geometry_name":"wkb_geometry","properties":{"ogc_fid":"2","area_id":"2","building_id":"2","type":"test","area":"test","owner":"test","description":"test","administration":"test","address":"test","property":"test","layer":"Green Area","extendedentity":null,"linetype":"test","entityhandle":null,"text":"test","wkb_geometry":"01020000000500000000FED478544F2541002731087F081741408D972E634F25418195438B70081741295C8FC28F4E254181E92631790517410AD7A3708D4E2541027B142EB405174100FED478544F2541002731087F081741"}}]}



      //in cazul in care dorim direct din GeoJson
      //$.getJSON('json/geojson.json', processGeoJSON );

      //console.log(geojson);

      if (ol.proj.proj4 && ol.proj.proj4.register) { ol.proj.proj4.register(proj4); }

      var features;


      $.ajax({
      type: "GET",
      url: "get_geojson.php?layer="+layer,
      dataType: 'json',
      async: false,
      success: function (response) {
      //console.log(response);
      //console.log(b);
      features = new ol.format.GeoJSON().readFeatures(response);
      }
      });


      var extent = ol.extent.createEmpty();
      features.forEach(function(feature){
      feature.setId(undefined);
      feature.getGeometry().transform('EPSG:31700', 'EPSG:3857');
      ol.extent.extend(extent, feature.getGeometry().getExtent());
      });

      var map = new ol.Map({
      layers: [
      new ol.layer.Tile({
      source: new ol.source.OSM(),
      }),
      new ol.layer.Vector({
      source: new ol.source.Vector({
      features: features
      })
      })
      ],
      target: 'map',
      controls: ol.control.defaults({
      attributionOptions:
      ({
      collapsible: false
      })
      }).extend([
      new ol.control.OverviewMap(),
      new ol.control.FullScreen(),
      new ol.control.ScaleLine()

      ]),
      interactions: [
      new ol.interaction.DragRotateAndZoom(),
      new ol.interaction.MouseWheelZoom(),
      new ol.interaction.DragPan(),
      new ol.interaction.DoubleClickZoom()
      ],
      view: new ol.View()
      });

      map.getView().fit(extent);

      }


      Which would normally have to refresh the map with new geometries ...



      This does not happen does anyone know why this phenomenon is happening?



      In the console there is no error, just when the page load is executing the function but when I give the onchange do not ...









      share














      I have a html selection of the form:



      <table class="table">
      <tr>
      <td>
      <label>Afiseaza:</label><br />
      <select id="layer" onchange="search()" class="form-control">
      <option value="Green Area">Teren</option>
      <option value="Building">Constructii</option>

      </select>
      </td>
      </tr>
      </table>


      Here we have a function in js which on an onchange event calls for the following:



      function search(){


      var layer = $('#layer').val();

      console.log(layer);

      proj4.defs('EPSG:31700','+proj=sterea +lat_0=46 +lon_0=25 +k=0.99975 +x_0=500000 +y_0=500000 +ellps=krass +towgs84=28,-121,-77,0,0,0,0 +units=m +no_defs');
      ol.proj.proj4.register(proj4);

      //var geojson = $.getJSON('json/geojson.json', function(data) { return data });
      //var geojson1 = {"type":"FeatureCollection","features":[{"type":"Feature","id":"2","geometry":{"type":"LineString","coordinates":[[698282.236,377375.758],[698289.591,377372.136],[698183.88,377182.298],[698182.72,377197.045],[698282.236,377375.758]]},"crs":{"type":"EPSG","properties":{"code":"31700"}},"geometry_name":"wkb_geometry","properties":{"ogc_fid":"2","area_id":"2","building_id":"2","type":"test","area":"test","owner":"test","description":"test","administration":"test","address":"test","property":"test","layer":"Green Area","extendedentity":null,"linetype":"test","entityhandle":null,"text":"test","wkb_geometry":"01020000000500000000FED478544F2541002731087F081741408D972E634F25418195438B70081741295C8FC28F4E254181E92631790517410AD7A3708D4E2541027B142EB405174100FED478544F2541002731087F081741"}}]}



      //in cazul in care dorim direct din GeoJson
      //$.getJSON('json/geojson.json', processGeoJSON );

      //console.log(geojson);

      if (ol.proj.proj4 && ol.proj.proj4.register) { ol.proj.proj4.register(proj4); }

      var features;


      $.ajax({
      type: "GET",
      url: "get_geojson.php?layer="+layer,
      dataType: 'json',
      async: false,
      success: function (response) {
      //console.log(response);
      //console.log(b);
      features = new ol.format.GeoJSON().readFeatures(response);
      }
      });


      var extent = ol.extent.createEmpty();
      features.forEach(function(feature){
      feature.setId(undefined);
      feature.getGeometry().transform('EPSG:31700', 'EPSG:3857');
      ol.extent.extend(extent, feature.getGeometry().getExtent());
      });

      var map = new ol.Map({
      layers: [
      new ol.layer.Tile({
      source: new ol.source.OSM(),
      }),
      new ol.layer.Vector({
      source: new ol.source.Vector({
      features: features
      })
      })
      ],
      target: 'map',
      controls: ol.control.defaults({
      attributionOptions:
      ({
      collapsible: false
      })
      }).extend([
      new ol.control.OverviewMap(),
      new ol.control.FullScreen(),
      new ol.control.ScaleLine()

      ]),
      interactions: [
      new ol.interaction.DragRotateAndZoom(),
      new ol.interaction.MouseWheelZoom(),
      new ol.interaction.DragPan(),
      new ol.interaction.DoubleClickZoom()
      ],
      view: new ol.View()
      });

      map.getView().fit(extent);

      }


      Which would normally have to refresh the map with new geometries ...



      This does not happen does anyone know why this phenomenon is happening?



      In the console there is no error, just when the page load is executing the function but when I give the onchange do not ...







      postgis openlayers-2 geojson ajax





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      asked 3 mins ago









      CoderCoder42CoderCoder42

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