rad*_*ek. 2 javascript openlayers-3
我的OpenLayer3地图有问题。当我在地图上添加一些标记时,我想调整地图大小并更改缩放比例,以便在屏幕上设置所有标记。
我的代码如下:
/** CREATE MARKERS **/
for (var i=0;i<1;i++){
var iconFeature = new ol.Feature({
geometry: new
ol.geom.Point(ol.proj.transform([Math.random()*360-180, Math.random()*180-90], 'EPSG:4326', 'EPSG:3857'))
});
vectorSource.addFeature(iconFeature);
var newBound = ol.Bounds();
newBound.extend([Math.random()*360-180, Math.random()*180-90]);
map.zoomToExtent(newBound);
}
/** MARKER STYLE **/
var iconStyle = [
new ol.style.Style({
image: new ol.style.Icon(/** @type {olx.style.IconOptions} */ ({
anchor: [0.5, 46],
anchorXUnits: 'fraction',
anchorYUnits: 'pixels',
opacity: 1,
scale: 0.07,
src: 'marker.png'
}))
})
];
/** ADD LAYER VECTOR **/
var vectorLayer = new ol.layer.Vector({
source: vectorSource,
style: iconStyle
});
/** INIT MAP **/
var map = new ol.Map({
layers: [
new ol.layer.Tile({
source: new ol.source.MapQuest({layer: 'sat'})
}),
vectorLayer
],
overlays: [overlay],
target: 'map',
view: new ol.View({
center: [0, 0],
zoom: 2
})
});
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有没有办法将地图缩放到标记?
您的逻辑和某些OL参考中都有一些错误。首先,您应该创建一个包含所有标记的ol.Extent。然后使用地图的视图进行调整。
// create ten random markers
for (var i = 0; i < 10; i++) {
var point = new ol.geom.Point(ol.proj.transform([Math.random() * 50, Math.random() * 50], 'EPSG:4326', 'EPSG:3857'));
var iconFeature = new ol.Feature({
geometry: point
});
vectorSource.addFeature(iconFeature);
}
// make the map's view to zoom and pan enough to display all the points
map.getView().fit(vectorSource.getExtent(), map.getSize());
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这是一个矮人:
https://plnkr.co/edit/KVL14vdOSqJBxZz44s3u?p=preview