在搜索传单地图时添加图层会改变多边形的不透明度

Question

我有两个传单地图，它们在点击搜索按钮的基础上加载了geojson。这显示了一些样式不透明度为0.3的多边形，因此您可以看到多边形下的街道名称。

除了任何额外的搜索和加载多边形都会开始更改多边形的不透明度，使其更加坚固，从而无法读取多边形下街道的名称之外，它的效果非常好。

我尝试在添加到地图之前清除geojson层，但问题仍然存在。

我在这里创建了一个问题的粗略代码笔：https://codepen.io/joomkit/pen/xxXgLPJ?editors=1111

本质上，只需单击搜索按钮即可加载层，无需填充侦听器即可运行函数并获取静态数据。

我试过各种方法来去除图层。第二次点击搜索是为了清除图层并加载一个新图层。在这个例子中，它只是重新加载原始数据，但不透明度已经清楚地显示出来了。

主代码也在下面。

var geoMap2;
var lamap = new L.Map("map2", {
center: new L.LatLng(51.44094723464765, 0.048892332250943187),
// center: new L.LatLng(39.75621,-104.99404),
zoom: 14,
maxZoom: 18
});
var osm2 = L.tileLayer(
"https://{s}.basemaps.cartocdn.com/rastertiles/voyager/{z}/{x}/{y}{r}.png",
{
attribution:
'&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors &copy; <a href="https://carto.com/attributions">CARTO</a>',
subdomains: "abcd",
maxZoom: 18
}
);
lamap.addLayer(osm2);
searchButton.addEventListener("click", function (e) {
let searchQuery = inputSearch.value;
// searchOpenFunding(searchQuery);
setLaMap(data);
});
function setLaMap(data) {
removeLayers();
let geojsonFeatureCollection2 = {
type: "FeatureCollection",
features: setFeatureCollection2(data)
};
geoMap2 = L.geoJSON(geojsonFeatureCollection2, {
style: polyStyleLAMap,
onEachFeature: function myonEachFeatureLaMap(feature, layer) {
layer.myTag = "myGeoJSON";
}
}).addTo(lamap);
lamap.setMaxBounds(lamap.fitBounds(geoMap2.getBounds()));
lamap.setZoom(13);
}
var removeLayers = function () {
lamap.eachLayer(function (layer) {
if (layer.myTag && layer.myTag === "myGeoJSON") {
lamap.removeLayer(layer);
console.log("rem layer from ");
}
});
};
function setFeatureCollection2(data) {
for (const [key, item] of Object.entries(data)) {
// setup lealfet geojson collection from data mapit api is incomplete pe ritem so we build it here
geoJsonFeatures2.push({
type: "Feature",
properties: {
craftentryId: item.id,
areaId: item.mapitAreaId,
lsoacode: item.lsoacode,
localauthority: item.localauthority,
openForFunding: item.openForFunding,
fundableRegion: item.fundableRegion,
title: item.title,
popupContent: ""
},
geometry: item.geojson
});
}
return geoJsonFeatures2;
}
function polyStyleLAMap(feature) {
return {
fillColor: getFillColorLaMap(feature.properties.openForFunding),
weight: 1,
opacity: 1,
color: getBorderColor(feature.properties.openForFunding),
dashArray: "0",
fillOpacity: 0.3
};
}
function getFillColorLaMap(d) {
return d === true ? "#FFFFFF" : d === false ? "#FED976" : "#FED976";
}
function getBorderColor(d) {
return d === true ? "#0e9c12" : d === false ? "#adabab" : "#cccccc";
}

Answer 1

看这里https://codepen.io

我修改的代码是：

// 029A, 029C
function setLaMap(data) {
removeLayers();
let geojsonFeatureCollection2 = {
type: "FeatureCollection",
features: setFeatureCollection2(data),
};
console.log(geojsonFeatureCollection2);
const geoMap2 = L.geoJSON(geojsonFeatureCollection2, {
style: polyStyleLAMap,
onEachFeature: function (feature, layer) {
layer.myTag = "myGeoJSON";
},
});
map.addLayer(geoMap2);
map.setMaxBounds(map.fitBounds(geoMap2.getBounds()));
// map.setZoom(13);
}
function removeLayers() {
map.eachLayer((layer) => {
if (layer.myTag && layer.myTag === "myGeoJSON") {
console.log(layer);
map.removeLayer(layer);
}
});
}

Answer 2

您需要将geojson层保留在全局变量中，并在使用新层数据重写之前将其删除。

var geoMap2;
function setLaMap(data){
if(geoMap2) { // if geoMap2 is set remove it
lamap.removeLayer(geoMap2)
}
const geojsonFeatureCollection2 = {
"type": "FeatureCollection",
"features": setFeatureCollection2(data)
}
geoMap2 = L.geoJSON(geojsonFeatureCollection2, {
style: polyStyleLAMap,
onEachFeature: myonEachFeatureLaMap
})
.........