我正在尝试在 MapBox GL JS 中对自定义标记进行聚类,但我无法弄清楚如何将自定义标记图像从 url 获取到符号层?它要么不起作用,要么根本没有标记出现。它是如何完成的?我需要知道如何将来自 url 的自定义图像与符号层一起使用。非常感谢。
map.addSource('parcelpoints', {
type: 'geojson',
data: geojson,
cluster: true,
clusterMaxZoom: 14, // Max zoom to cluster points on
clusterRadius: 50 // Radius of each cluster when clustering points (defaults to 50)
});
map.addLayer({
id: 'clusters',
type: 'circle',
source: 'parcelpoints',
filter: ['has', 'point_count'],
paint: {
// Use step expressions (https://www.mapbox.com/mapbox-gl-js/style-spec/#expressions-step)
// with three steps to implement three types of circles:
// * Blue, 20px circles when point count is less than 100
// * Yellow, 30px circles when point count is between 100 and 750
// * Pink, 40px circles when point count is greater than or equal to 750
'circle-color': [
'step',
['get', 'point_count'],
'#51bbd6',
100,
'#f1f075',
750,
'#f28cb1'
],
'circle-radius': [
'step',
['get', 'point_count'],
20,
100,
30,
750,
40
]
}
});
map.addLayer({
id: 'cluster-count',
type: 'symbol',
source: 'parcelpoints',
filter: ['has', 'point_count'],
layout: {
'text-field': '{point_count_abbreviated}',
'text-font': ['DIN Offc Pro Medium', 'Arial Unicode MS Bold'],
'text-size': 12
}
});
map.addLayer({
id: 'unclustered-point',
type: 'symbol',
source: 'parcelpoints',
filter: ['!has', 'point_count'],
'layout': {
'visibility': 'visible',
'icon-image': { url: "marker.svg" }
}
});