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iClient-JavaScript
/
examples
/
maplibregl
/
01_mapQueryBySQL.html

<!--********************************************************************
* Copyright© 2000 - 2026 SuperMap Software Co.Ltd. All rights reserved.
*********************************************************************-->
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title data-i18n="resources.title_mapQueryBySQL"></title>
    <style>
      #toolbar {
        position: absolute;
        top: 50px;
        right: 10px;
        width: 240px;
        text-align: center;
        z-index: 1000;
        border-radius: 4px;
      }
  </style>
</head>
<body style=" margin: 0;overflow: hidden;background: #fff;width: 100%;height:100%;position: absolute;top: 0;">
<div id="toolbar" class="panel panel-primary">
  <div class='panel-heading'>
      <h5 class='panel-title text-center' data-i18n="resources.title_queryBySQL"></h5></div>
  <div class='panel-body content'>
      <div class='panel'>
        <div class='input-group'>
          <span class='input-group-addon'>SQL</span>
          <input min="0" class="form-control" id="sql" placeholder="SMID < 10" />
        </div>
      </div>
      <input type="button" class="btn btn-default" data-i18n="[value]resources.text_query" onclick="query()"/>&nbsp;
      <input type="button" class="btn btn-default" data-i18n="[value]resources.text_input_value_clear" onclick="clearFeatures()"/>
  </div>
</div>
<div id="map" style="margin:0 auto;width: 100%;height: 100%"></div>
<script type="text/javascript" include="bootstrap" src="../js/include-web.js"></script>
<script type="text/javascript" src="../../dist/maplibregl/include-maplibregl.js"></script>
<script type="text/javascript">
    var host = window.isLocal ? window.server : "https://iserver.supermap.io";
    var url = host + "/iserver/services/map-world/rest/maps/World";
    var attribution = "<a href='https://maplibre.org/' target='_blank'>© MapLibre </a>" +
       "with <span>© <a href='https://iclient.supermap.io' target='_blank'>SuperMap iClient</a> | </span>" +
       " Map Data <span>© <a href='http://support.supermap.com.cn/product/iServer.aspx' target='_blank'>SuperMap iServer</a></span> ";
    var map = new maplibregl.Map({
        container: 'map',
        style: {
            "version": 8,
            "sources": {
                "raster-tiles": {
                    "attribution": attribution,
                    "type": "raster",
                    "tiles": [host + '/iserver/services/maps/rest/maps/World/zxyTileImage.png?prjCoordSys='+encodeURIComponent('{"epsgCode":3857}')+'&z={z}&x={x}&y={y}'],
                    "tileSize": 256,
                },
            },
            "layers": [{
                "id": "simple-tiles",
                "type": "raster",
                "source": "raster-tiles",
                "minzoom": 0,
                "maxzoom": 22
            }],
        },
        center: [0, 0],
        maxZoom: 18,
        zoom: 2
    });
    map.addControl(new maplibregl.supermap.LogoControl({ link: "https://iclient.supermap.io" }), 'bottom-right');
    map.addControl(new maplibregl.NavigationControl(), 'top-left');

    map.on('load', function () {
        query();
    });

    function query() {
        clearFeatures();
        var sql = document.getElementById("sql").value || "SMID < 10";
        var param = new maplibregl.supermap.QueryBySQLParameters({
            queryParams: {
                name: "Capitals@World.1",
                attributeFilter: sql
            }
        });

        queryService = new maplibregl.supermap.QueryService(url).queryBySQL(param).then(function (serviceResult) {
            var recordsets = serviceResult && serviceResult.result && serviceResult.result.recordsets;
            var features = recordsets && recordsets[0] && recordsets[0].features;
            map.addLayer({
                "id": "points",
                "type": "circle",
                "paint": {
                    "circle-radius": 6,
                    "circle-color": "#007cbf",
                    "circle-opacity":0.1,
                    "circle-stroke-width":2,
                    "circle-stroke-color":"#007cbf",
                    "circle-stroke-opacity":0.5
                },
                "source": {
                    "type": "geojson",
                    "data": features
                }
            });
        });
    }

    function clearFeatures() {
      if (map.getLayer('points')) {
        map.removeLayer('points');
        map.removeSource('points');
      }
    }

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