传单和草皮。我正在尝试在Leaflet地图上找到当用户单击地图时与点相交的所有图层。我正在使用草皮库对此进行测试。在控制台中,当我单击地图时,它将返回此错误:
var c = new L.GeoJSON.AJAX("http://127.0.0.1:8000/childcare_buff_data/",{
style: color(c, "orange", 0.8)})
;
c.addTo(map);
map.on('click',function(e){
lat = e.latlng.lat;
lon = e.latlng.lng;
ProcessClick(lat,lon)
});
var theMarker;
var a;
function ProcessClick(lat,lon){
theMarker = L.marker([lat,lon]).addTo(map);
c.eachLayer(function(layer) {
intersects=turf.intersect(theMarker.toGeoJSON(),layer.toGeoJSON());
if (intersects){
a=layer.feature.properties.buff
console.log(a);
}
})};
我收到此错误
turf.min.js:1 Uncaught TypeError: Cannot read property 'length' of null
at turf.min.js:1
at turf.min.js:1
at S (turf.min.js:1)
at Pn (turf.min.js:1)
at Object.Lo [as intersect] (turf.min.js:1)
at js2.js:31
at eachLayer (leaflet.js:5)
at ProcessClick (js2.js:30)
at e.<anonymous> (js2.js:22)
at e.fire (leaflet.js:5)
这是geojson http://www.mediafire.com/file/9fnbz32ib9n1aaj/childcare.geojson/file
更新
使用
turf.booleanWithin(theMarker.toGeoJSON(),geom.toGeoJSON());
我得到
turf.min.js:1 Uncaught Error: coordinates must only contain numbers
at Y (turf.min.js:1)
at Y (turf.min.js:1)
at U (turf.min.js:1)
at Pt (turf.min.js:1)
at Object.Cn [as booleanWithin] (turf.min.js:1)
at js2.js:33
at eachLayer (leaflet.js:5)
at ProcessClick (js2.js:31)
at e.<anonymous> (js2.js:22)
at e.fire (leaflet.js:5)
答案 0 :(得分:0)
intersect
需要两个多边形作为其参数,但是您要为其输入一个点,因此缺少length
属性:
获取两个多边形并找到它们的交点
改为尝试turf.booleanWithin(theMarker.toGeoJSON(), layer.toGeoJSON())
:
Boolean-within如果第一个几何完全在内部,则返回true 第二种几何。