我第一次使用leaflet/JavaScript,并想显示一个地图,其中包含一个GeoJSON图层,在每次移动时都会更改...只显示该区域内的点。
这是我的代码源:
// Function to refresh points to display
function actualiseGeoJSON() {
// Default icon for my points
var defaultIcon = L.icon({
iconUrl: '../images/icones/cabane.png',
iconSize: [16, 16],
iconAnchor: [8, 8],
popupAnchor: [0, -8]
});
// We create each point with its style (from GeoJSON file)
function onEachFeature(feature, layer) {
var popupContent = '<a href="' + feature.properties.url + '">' + feature.properties.nom + "</a>";
layer.bindPopup(popupContent);
var cabaneIcon = L.icon({
iconUrl: '../images/icones/' + feature.properties.type + '.png',
iconSize: [16, 16],
iconAnchor: [8, 8],
popupAnchor: [0, -8]
});
layer.setIcon(cabaneIcon);
}
// We download the GeoJSON file (by using ajax plugin)
var GeoJSONlayer = L.geoJson.ajax('../exportations/exportations.php?format=geojson&bbox=' + map.getBounds().toBBoxString() + '',{
onEachFeature: onEachFeature,
pointToLayer: function (feature, latlng) {
return L.marker(latlng, {icon: defaultIcon});
}
}).addTo(map);
}
// We create the map
var map = L.map('map');
L.tileLayer('http://maps.refuges.info/hiking/{z}/{x}/{y}.png', {
attribution: '© Contributeurs d\'<a href="http://openstreetmap.org">OpenStreetMap</a>',
maxZoom: 18
}).addTo(map);
// An empty base layer
var GeoJSONlayer = L.geoJson().addTo(map);
// Used to only show your area
function onLocationFound(e) {
var radius = e.accuracy / 2;
L.marker(e.latlng).addTo(map);
actualiseGeoJSON();
}
function onLocationError(e) {
alert(e.message);
actualiseGeoJSON();
}
function onMove() {
// map.removeLayer(GeoJSONlayer);
actualiseGeoJSON();
}
map.locate({setView: true, maxZoom: 14});
// Datas are modified if
map.on('locationerror', onLocationError);
map.on('locationfound', onLocationFound);
map.on('moveend', onMove);
我尝试在第一个函数中删除图层,但未定义GeoJSONlayer
我尝试在onMove()中删除图层,但没有显示任何内容
我尝试在moveend事件中删除图层,但出现了语法错误...
如果有人能帮助我...
对不起,我的英语不好,我是个法国人,使用的是法国函数名称