使用JavaScript的多个多边形 - 不工作 - 数据是JSON类型

Question

我试图为伦敦自治市镇添加多个多边形，但出于某种原因，我不能有多个多边形，当我改变行政区的顺序时，我失去了多边形。 这是我在html中使用的函数代码：

<script>
function initialize() {
    var map = new google.maps.Map(document.getElementById('map_canvas'), {
        center: new google.maps.LatLng(51.50722, -0.12750), 
        mapTypeId: google.maps.MapTypeId.ROADMAP,
        zoom: 11 
    });
    var points = new google.maps.MVCArray();
    for (var y in borough) {
        var area = borough[y];
        var location = new google.maps.LatLng(area.lat,area.lng);
        points.push(location );
        }
    var polygonOptions = {path:points,map:map, fillColor:"#d3d3d3"};
    var polygon1 = new google.maps.Polygon(polygonOptions);
    var polygon2 = new google.maps.Polygon(polygonOptions);
    polygon.setMap(map); 

    var polyline = new google.maps.Polyline({path:points,map:map});
    }
    google.maps.event.addDomListener(window, 'load', initialize);
</script>

var borough = [{"name":"City of London","PointID":1,"PolygonID":294,"SubPolygonID":1,"lat":51.52028098,"lng":-0.085197314,"AvgPropertyVal":532562},
{"name":"City of London","PointID":2,"PolygonID":294,"SubPolygonID":1,"lat":51.51976087,"lng":-0.08330491,"AvgPropertyVal":532562},
{"name":"City of London","PointID":3,"PolygonID":294,"SubPolygonID":1,"lat":51.52070385,"lng":-0.081741648,"AvgPropertyVal":532562},
{"name":"City of London","PointID":4,"PolygonID":294,"SubPolygonID":1,"lat":51.52189991,"lng":-0.081029725,"AvgPropertyVal":532562},
{"name":"City of London","PointID":5,"PolygonID":294,"SubPolygonID":1,"lat":51.52145663,"lng":-0.07845078,"AvgPropertyVal":532562},
{"name":"City of London","PointID":6,"PolygonID":294,"SubPolygonID":1,"lat":51.51879156,"lng":-0.079409083,"AvgPropertyVal":532562},
{"name":"City of London","PointID":7,"PolygonID":294,"SubPolygonID":1,"lat":51.51891429,"lng":-0.078061953,"AvgPropertyVal":532562},
{"name":"City of London","PointID":8,"PolygonID":294,"SubPolygonID":1,"lat":51.51841529,"lng":-0.078126209,"AvgPropertyVal":532562},
{"name":"City of London","PointID":9,"PolygonID":294,"SubPolygonID":1,"lat":51.51658307,"lng":-0.076836949,"AvgPropertyVal":532562},
{"name":"City of London","PointID":10,"PolygonID":294,"SubPolygonID":1,"lat":51.51439986,"lng":-0.073948334,"AvgPropertyVal":532562},
{"name":"City of London","PointID":11,"PolygonID":294,"SubPolygonID":1,"lat":51.5117546,"lng":-0.073042428,"AvgPropertyVal":532562},
{"name":"City of London","PointID":12,"PolygonID":294,"SubPolygonID":1,"lat":51.51075058,"lng":-0.072743252,"AvgPropertyVal":532562},
{"name":"City of London","PointID":13,"PolygonID":294,"SubPolygonID":1,"lat":51.51005109,"lng":-0.072970229,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":14,"PolygonID":294,"SubPolygonID":1,"lat":51.50969617,"lng":-0.075563381,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":15,"PolygonID":294,"SubPolygonID":1,"lat":51.51049005,"lng":-0.076264961,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":16,"PolygonID":294,"SubPolygonID":1,"lat":51.50997169,"lng":-0.077942657,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":17,"PolygonID":294,"SubPolygonID":1,"lat":51.50935818,"lng":-0.078861965,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":18,"PolygonID":294,"SubPolygonID":1,"lat":51.50900383,"lng":-0.079078631,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":19,"PolygonID":294,"SubPolygonID":1,"lat":51.5087737,"lng":-0.078700648,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":20,"PolygonID":294,"SubPolygonID":1,"lat":51.50780117,"lng":-0.079430139,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":21,"PolygonID":294,"SubPolygonID":1,"lat":51.50795307,"lng":-0.080317449,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":22,"PolygonID":294,"SubPolygonID":1,"lat":51.50833588,"lng":-0.081510465,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":23,"PolygonID":294,"SubPolygonID":1,"lat":51.50854038,"lng":-0.085438904,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":24,"PolygonID":294,"SubPolygonID":1,"lat":51.50887225,"lng":-0.088582498,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":25,"PolygonID":294,"SubPolygonID":1,"lat":51.50935403,"lng":-0.091993644,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":26,"PolygonID":294,"SubPolygonID":1,"lat":51.51006508,"lng":-0.095239637,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":27,"PolygonID":294,"SubPolygonID":1,"lat":51.51050631,"lng":-0.095219785,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":28,"PolygonID":294,"SubPolygonID":1,"lat":51.51015777,"lng":-0.096129238,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":29,"PolygonID":294,"SubPolygonID":1,"lat":51.5106974,"lng":-0.099848011,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":30,"PolygonID":294,"SubPolygonID":1,"lat":51.51075644,"lng":-0.108452199,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":31,"PolygonID":294,"SubPolygonID":1,"lat":51.51070262,"lng":-0.11147895,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":32,"PolygonID":294,"SubPolygonID":1,"lat":51.51158903,"lng":-0.111510482,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":33,"PolygonID":294,"SubPolygonID":1,"lat":51.51271566,"lng":-0.112394912,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":34,"PolygonID":294,"SubPolygonID":1,"lat":51.51314183,"lng":-0.111718632,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":35,"PolygonID":294,"SubPolygonID":1,"lat":51.51363133,"lng":-0.111960732,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":36,"PolygonID":294,"SubPolygonID":1,"lat":51.51377184,"lng":-0.111081486,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":37,"PolygonID":294,"SubPolygonID":1,"lat":51.51528447,"lng":-0.111586766,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":38,"PolygonID":294,"SubPolygonID":1,"lat":51.51820408,"lng":-0.11380106,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":39,"PolygonID":294,"SubPolygonID":1,"lat":51.51771182,"lng":-0.107806514,"AvgPropertyVal":532562 },
{"name":"City of London","PointID":40,"PolygonID":294,"SubPolygonID":1,"lat":51.51848749,"lng":-0.105329753,"AvgPropertyVal":532562},
{"name":"City of London","PointID":41,"PolygonID":294,"SubPolygonID":1,"lat":51.51961204,"lng":-0.101800545,"AvgPropertyVal":532562},
{"name":"City of London","PointID":42,"PolygonID":294,"SubPolygonID":1,"lat":51.52022984,"lng":-0.099634275,"AvgPropertyVal":532562},
{"name":"City of London","PointID":43,"PolygonID":294,"SubPolygonID":1,"lat":51.52066889,"lng":-0.097649839,"AvgPropertyVal":532562},
{"name":"City of London","PointID":44,"PolygonID":294,"SubPolygonID":1,"lat":51.5209784,"lng":-0.097603787,"AvgPropertyVal":532562},
{"name":"City of London","PointID":45,"PolygonID":294,"SubPolygonID":1,"lat":51.52153954,"lng":-0.097382896,"AvgPropertyVal":532562},
{"name":"City of London","PointID":46,"PolygonID":294,"SubPolygonID":1,"lat":51.52282395,"lng":-0.097952107,"AvgPropertyVal":532562},
{"name":"City of London","PointID":47,"PolygonID":294,"SubPolygonID":1,"lat":51.52326785,"lng":-0.096765939,"AvgPropertyVal":532562},
{"name":"City of London","PointID":48,"PolygonID":294,"SubPolygonID":1,"lat":51.5227681,"lng":-0.096449451,"AvgPropertyVal":532562},
{"name":"City of London","PointID":49,"PolygonID":294,"SubPolygonID":1,"lat":51.52308377,"lng":-0.095068249,"AvgPropertyVal":532562},
{"name":"City of London","PointID":50,"PolygonID":294,"SubPolygonID":1,"lat":51.52142965,"lng":-0.094324281,"AvgPropertyVal":532562},
{"name":"City of London","PointID":51,"PolygonID":294,"SubPolygonID":1,"lat":51.5214323,"lng":-0.09249635,"AvgPropertyVal":532562},
{"name":"City of London","PointID":52,"PolygonID":294,"SubPolygonID":1,"lat":51.52097407,"lng":-0.092354076,"AvgPropertyVal":532562},
{"name":"City of London","PointID":53,"PolygonID":294,"SubPolygonID":1,"lat":51.52066153,"lng":-0.08967301,"AvgPropertyVal":532562},
{"name":"City of London","PointID":54,"PolygonID":294,"SubPolygonID":1,"lat":51.51991658,"lng":-0.089983841,"AvgPropertyVal":532562},
{"name":"City of London","PointID":55,"PolygonID":294,"SubPolygonID":1,"lat":51.51875522,"lng":-0.08620691,"AvgPropertyVal":532562,},
{"name":"City of London","PointID":56,"PolygonID":294,"SubPolygonID":1,"lat":51.52028098,"lng":-0.085197314,"AvgPropertyVal":532562},

];

Answer 1

您需要动态创建多边形。

function initialize() {
    var map = new google.maps.Map(document.getElementById('map_canvas'), {
        center: new google.maps.LatLng(51.50722, -0.12750),
        mapTypeId: google.maps.MapTypeId.ROADMAP,
        zoom: 11
    });
    var points = new google.maps.MVCArray();
    var areas = [];
    for (var x in borough) {
        var area = borough[x];
        if (!areas[area.name]) areas[area.name] = [];
        areas[area.name].push(new google.maps.LatLng(area.lat, area.lng));
    }
    for (name in areas) {
        var polygonOptions = {
            path: areas[name],
            map: map,
            fillColor: "#d3d3d3"
        };
        var polygon = new google.maps.Polygon(polygonOptions);
        polygon.setMap(map);

        var polyline = new google.maps.Polyline({
            path: areas[name],
            map: map
        });
    }
}
google.maps.event.addDomListener(window, 'load', initialize);

working jsfiddle

代码段：

function initialize() {
    var map = new google.maps.Map(document.getElementById('map_canvas'), {
        center: new google.maps.LatLng(51.50722, -0.12750),
        mapTypeId: google.maps.MapTypeId.ROADMAP,
        zoom: 11
    });
    var points = new google.maps.MVCArray();
    var areas = [];
    for (var x in borough) {
        var area = borough[x];
        if (!areas[area.name]) areas[area.name] = [];
        areas[area.name].push(new google.maps.LatLng(area.lat, area.lng));
    }
    for (name in areas) {
        var polygonOptions = {
            path: areas[name],
            map: map,
            fillColor: "#d3d3d3"
        };
        var polygon = new google.maps.Polygon(polygonOptions);
        polygon.setMap(map);

        var polyline = new google.maps.Polyline({
            path: areas[name],
            map: map
        });
    }
}
google.maps.event.addDomListener(window, 'load', initialize);

var borough = [{
    "name": "City of London",
    "PointID": 38,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.51820408,
    "lng": -0.11380106,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 39,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.51771182,
    "lng": -0.107806514,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 40,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.51848749,
    "lng": -0.105329753,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 41,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.51961204,
    "lng": -0.101800545,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 42,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.52022984,
    "lng": -0.099634275,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 43,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.52066889,
    "lng": -0.097649839,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 44,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.5209784,
    "lng": -0.097603787,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 45,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.52153954,
    "lng": -0.097382896,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 46,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.52282395,
    "lng": -0.097952107,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 47,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.52326785,
    "lng": -0.096765939,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 48,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.5227681,
    "lng": -0.096449451,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 49,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.52308377,
    "lng": -0.095068249,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 50,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.52142965,
    "lng": -0.094324281,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 51,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.5214323,
    "lng": -0.09249635,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 52,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.52097407,
    "lng": -0.092354076,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 53,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.52066153,
    "lng": -0.08967301,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 54,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.51991658,
    "lng": -0.089983841,
    "AvgPropertyVal": 532562
}, {
    "name": "City of London",
    "PointID": 55,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.51875522,
    "lng": -0.08620691,
    "AvgPropertyVal": 532562,
}, {
    "name": "City of London",
    "PointID": 56,
    "PolygonID": 294,
    "SubPolygonID": 1,
    "lat": 51.52028098,
    "lng": -0.085197314,
    "AvgPropertyVal": 532562
}, {
    "name": "Kensington and Chelsea",
    "PointID": 1,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.5301034,
    "lng": -0.227570192,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 2,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.52986475,
    "lng": -0.227667393,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 3,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.53011597,
    "lng": -0.225428696,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 4,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.52987182,
    "lng": -0.22361582,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 5,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.52858731,
    "lng": -0.217960999,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 6,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.52787514,
    "lng": -0.216010828,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 7,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.5266668,
    "lng": -0.215554931,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 8,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.52681364,
    "lng": -0.212680307,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 9,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.52618572,
    "lng": -0.207301665,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 10,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.52568566,
    "lng": -0.205884067,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 11,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.52340567,
    "lng": -0.203863227,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 12,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.52268878,
    "lng": -0.201621023,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 13,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.52065721,
    "lng": -0.200615665,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 14,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.52084575,
    "lng": -0.202650801,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 15,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.52056941,
    "lng": -0.203748556,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 16,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.51774584,
    "lng": -0.20146985,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 17,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.5179234,
    "lng": -0.200729212,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 18,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.51679328,
    "lng": -0.199926247,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 19,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.51449785,
    "lng": -0.199189476,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 20,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.51497834,
    "lng": -0.195054208,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 21,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.51265905,
    "lng": -0.194348907,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 22,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.51170297,
    "lng": -0.194046611,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 23,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.51176008,
    "lng": -0.192966365,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 24,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.50981461,
    "lng": -0.19212532,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 25,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.51012551,
    "lng": -0.18791505,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 26,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.50173969,
    "lng": -0.184240718,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 27,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.50140731,
    "lng": -0.180317506,
    "AvgPropertyVal": 1288411
}, {
    "name": "Kensington and Chelsea",
    "PointID": 28,
    "PolygonID": 313,
    "SubPolygonID": 1,
    "lat": 51.4977246,
    "lng": -0.179552223,
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