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turf-lineDistance.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Turf - lineDistance</title>
<style>
#mapDiv { width: 600px; height: 400px; }
.map-box{ padding: 10px; font-size: 16px; }
.length{ font-size: 20px; margin-bottom: 10px; }
</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 class="length"></div>
<div id="mapDiv"></div>
<script>
var map, infoWindow = new google.maps.InfoWindow({ content: "" });
var styles=[{featureType:"poi",stylers:[{visibility:"off"}]},{stylers:[{saturation:-70},{lightness:37},{gamma:1.15}]},{elementType:"labels",stylers:[{gamma:.26},{visibility:"on"}]},{featureType:"road",stylers:[{lightness:0},{saturation:0},{hue:"#ffffff"},{gamma:0}]},{featureType:"road",elementType:"labels.text.stroke",stylers:[{visibility:"off"}]},{featureType:"road.arterial",elementType:"geometry",stylers:[{lightness:20}]},{featureType:"road.highway",elementType:"geometry",stylers:[{lightness:50},{saturation:0},{hue:"#ffffff"}]},{featureType:"administrative.province",stylers:[{visibility:"on"},{lightness:-50}]},{featureType:"administrative.province",elementType:"labels.text.stroke",stylers:[{visibility:"off"}]},{featureType:"administrative.province",elementType:"labels.text",stylers:[{lightness:20}]}];
google.maps.InfoWindow.prototype.isOpen = function(){
var map = this.getMap();
return (map !== null && typeof map !== "undefined");
}
function initMap() {
var line = {
"type": "Feature",
"properties": { "line": "on" },
"geometry": {
"type": "LineString",
"coordinates": [
[121.6164207458496,25.04330389487308],
[121.61517620086669,25.04583112030013],
[121.61590576171876,25.048241656016565],
[121.6155195236206,25.05049663039367],
[121.61667823791504,25.05512308589586]
]
}
};
var length = turf.lineDistance(line, 'kilometers');
$('.length').text( '總長' + length + ' 公里');
// 地圖初始設定
var mapOptions = {
center: new google.maps.LatLng(25.04880, 121.615262),
zoom: 15,
mapTypeId: google.maps.MapTypeId.ROADMAP,
styles: styles
};
var mapElement = document.getElementById("mapDiv");
// Google 地圖初始化
map = new google.maps.Map(mapElement, mapOptions);
map.data.addGeoJson(line);
map.data.setStyle(function(feature){
if( feature.getProperty('line') ){
return { strokeWeight: 5, strokeColor: '#e55', strokeOpacity: 1 };
}
});
}
</script>
</body>
</html>