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Filter Map Markers Dynamically

Environment

Product Version 2017.3 1026
Product Progress Kendo UI Map

Description

How can I dynamically filter the layer of markers in the Map?

Solution

The marker layer is added to the Map when the Map is initialized. To filter the markers, re-initialize the Map with the filtered data.

    <div id="example">

    <div id="map"></div>

    <script>
        function createMap() {
            $("#map").kendoMap({
                center: [30.268107, -97.744821],
                zoom: 15,
                layers: [{
                    type: "tile",
                    urlTemplate: "http://#= subdomain #.tile2.opencyclemap.org/transport/#= zoom #/#= x #/#= y #.png",
                    subdomains: ["a", "b", "c"],
                    attribution: "&copy; <a href='http://osm.org/copyright'>OpenStreetMap contributors</a>." +
                                 "Tiles courtesy of <a href='http://www.opencyclemap.org/'>Andy Allan</a>"
                }, {
                    type: "marker",
                    dataSource: {
                        transport: {
                            read: {
                                url: "../content/dataviz/map/store-locations.json",
                                dataType: "json"
                            }
                        },
                      filter: [{field: "name", operator: "startswith", value: "A"}]
                    },
                    locationField: "latlng",
                    titleField: "name"
                }],

            });

          setTimeout(function(){ //to simulate dynamic filtering
            var map =$("#map").data("kendoMap");
            var options = map.options;

            options.layers[1].dataSource.filter = [{field: "name", operator: "startswith", value: "F"}]; // 1 points to the markers layer that we want to filter
            map.destroy();
            map.setOptions(options);
            $("#map").kendoMap(options);
          }, 1000)
        }

        $(document).ready(createMap);
    </script>
    </div>
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