为FeatureCollection GeoJSON对象的构造函数中的每个Feature对象指定内联颜色内联的正确方法是什么?我正在尝试多种方法将其设置为蓝色,但结果仍然是默认的黑色笔触颜色。谢谢!
<head>
<title>LineString Colors</title>
<meta name="viewport" content="initial-scale=1.0">
<meta charset="utf-8">
<style>
html, body {
height: 100%;
margin: 0;
padding: 0;
}
#map {
height: 100%;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
var map;
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
center: {lat: 33.9720, lng: -81.0527},
zoom: 6
});
map.data.addGeoJson({
"type": "FeatureCollection",
"features": [
{"type": "Feature",
"geometry":
{"type": "LineString",
"coordinates": [[-81.0527, 33.9720],
[-79.6651, 34.9167],
[-85.0252, 38.6221]],
"strokeColor": "#0000FF",
},
"strokeColor": "#0000FF",
"style": {"strokeColor": "#0000FF"}
}
],
"strokeColor": "#0000FF"
});
}
</script>
<script src="https://maps.googleapis.com/maps/api/js?callback=initMap"
async defer></script>
</body>
答案 0 :(得分:2)
如果您只想让所有折线都变成蓝色,那么您只需要:
map.data.setStyle(function (feature) {
return {
strokeColor: "#0000FF"
};
});
但是,如果您在标题中暗示,您想要指定GeoJSON中的颜色,则可以在功能的strokeColor
中设置properties
,然后您可以使用{{ 1}}:
getProperty
然后使用它来动态设置折线的颜色:
var strokeColor = feature.getProperty('strokeColor');
代码段
map.data.setStyle(function (feature) {
var strokeColor = feature.getProperty('strokeColor');
return {
strokeColor: strokeColor,
strokeWeight: 2
};
});
var map;
function initMap() {
var gbounds = new google.maps.LatLngBounds();
gbounds.extend(new google.maps.LatLng(33.9720039368, -81.052734375));
gbounds.extend(new google.maps.LatLng(34.9167518616, -79.6651229858));
map = new google.maps.Map(document.getElementById('map'), {
center: gbounds.getCenter(),
zoom: 6
});
map.data.setStyle(function(feature) {
var strokeColor = feature.getProperty('strokeColor');
return {
strokeColor: strokeColor,
strokeWeight: 2
};
});
map.data.addGeoJson({
"type": "FeatureCollection",
"features": [{
"type": "Feature",
"geometry": {
"type": "LineString",
"coordinates": [
[-81.052734375, 33.9720039368],
[-79.665122985799997, 34.916751861599998],
[-85.025260925300003, 38.622150421100002]
],
},
properties: {
"strokeColor": "#0000FF"
}
}, {
"type": "Feature",
"geometry": {
"type": "LineString",
"coordinates": [
[-80.1, 33.9],
[-79.6, 34.916751861599998],
[-85.1, 39.6]
],
},
properties: {
"strokeColor": "#FF0000"
}
}]
});
}
google.maps.event.addDomListener(window, 'load', initMap);
html,
body {
height: 100%;
margin: 0;
padding: 0;
}
#map {
height: 100%;
}