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turf-aggregations.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Turf - aggregation</title>
<style>
#mapDiv { width: 980px; height: 600px; }
.map-box{ padding: 10px; font-size: 16px; }
</style>
<script src="js/jquery-1.11.3.min.js"></script>
<script src="js/turf.min.js"></script>
<script src="https://maps.googleapis.com/maps/api/js?libraries=drawing"></script>
</head>
<body onload="initMap()">
<div id="mapDiv"></div>
<script>
var map, infoWindow = new google.maps.InfoWindow({ content: "" });
google.maps.InfoWindow.prototype.isOpen = function(){
var map = this.getMap();
return (map !== null && typeof map !== "undefined");
}
function initMap() {
var polygons = {type:"FeatureCollection",features:[{type:"Feature",properties:{gtype: "box"},geometry:{type:"Polygon",coordinates:[[[121.51183,25.05127],[121.51183,25.06538],[121.52831,25.06538],[121.52831,25.05127],[121.51183,25.05127]]]}},{type:"Feature",properties:{gtype: "box"},geometry:{type:"Polygon",coordinates:[[[121.53290,25.04439],[121.53290,25.06453],[121.54655,25.06453],[121.54655,25.04439],[121.53290,25.04439]]]}}]};
// points
var points1 = turf.random('points', 25, { bbox: [121.51, 25.04, 121.55, 25.07]});
for (var i = 0; i < points1.features.length; i++) { points1.features[i].properties.point = ~~(Math.random() * 10 + 1); }
// 地圖初始設定
var mapOptions = {
center: new google.maps.LatLng(25.06164, 121.52876),
zoom: 14,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var mapElement = document.getElementById("mapDiv");
// Google 地圖初始化
map = new google.maps.Map(mapElement, mapOptions);
map.data.setStyle(function(feature) {
// points
if( feature.getProperty('point') ){
return { icon: new google.maps.MarkerImage("http://chart.apis.google.com/chart?chst=d_map_spin&chld=0.7|0|80e516|13|b|" + feature.getProperty('point')) };
}
});
// 載入 GeoJSON 資料
// map.data.addGeoJson(data);
// map.data.addGeoJson(points1);
var aggregations = [
{
aggregation: 'sum',
inField: 'point',
outField: 'pop_sum'
},
{
aggregation: 'average',
inField: 'point',
outField: 'pop_avg'
},
{
aggregation: 'median',
inField: 'point',
outField: 'pop_median'
},
{
aggregation: 'min',
inField: 'point',
outField: 'pop_min'
},
{
aggregation: 'max',
inField: 'point',
outField: 'pop_max'
},
{
aggregation: 'deviation',
inField: 'point',
outField: 'pop_deviation'
},
{
aggregation: 'variance',
inField: 'point',
outField: 'pop_variance'
},
{
aggregation: 'count',
inField: '',
outField: 'point_count'
}
];
var aggregated = turf.aggregate(polygons, points1, aggregations);
var result = turf.featurecollection(points1.features.concat(aggregated.features));
map.data.addGeoJson(result);
map.data.addListener('click', function(e) {
if( !!e.feature.getProperty('gtype') ){
var str = [];
str.push('<div class="map-box">sum: '+ e.feature.getProperty('pop_sum') + '</div>');
str.push('<div class="map-box">avg: '+ e.feature.getProperty('pop_avg') + '</div>');
str.push('<div class="map-box">median: '+ e.feature.getProperty('pop_median') + '</div>');
str.push('<div class="map-box">min: '+ e.feature.getProperty('pop_min') + '</div>');
str.push('<div class="map-box">max: '+ e.feature.getProperty('pop_max') + '</div>');
str.push('<div class="map-box">deviation: '+ e.feature.getProperty('pop_deviation') + '</div>');
str.push('<div class="map-box">variance: '+ e.feature.getProperty('pop_variance') + '</div>');
str.push('<div class="map-box">count: '+ e.feature.getProperty('point_count') + '</div>');
infoWindow.setContent(str.join(''));
}
else if( !!e.feature.getProperty('point') ){
infoWindow.setContent('<div class="map-box">' + e.feature.getProperty('point') + "</div>");
}
var anchor = new google.maps.MVCObject();
anchor.set("position", e.latLng);
infoWindow.open(map,anchor);
});
}
</script>
</body>
</html>