本文基于腾讯课堂老胡的课《跟我学Openlayers--基础实例详解》做的学习笔记，使用的openlayers 5.3.x api。
源码 见 1046.html ，对应的 官网示例 https://openlayers.org/en/latest/examples/kml.html?q=wkt
image.png
image.png
<!DOCTYPE html>
<html>
<head>
<title>KML</title>
<link rel="stylesheet" href="../include/ol.css" type="text/css" />
<script src="../include/ol.js"></script>
</head>
<style>
</style>
<body>
<div id="info"> </div>
<div id="map" class="map"></div>
<script>
var raster = new ol.layer.Tile({
source: new ol.source.BingMaps({
imagerySet: "Aerial",
key: "As1HiMj1PvLPlqc_gtM7AqZfBL8ZL3VrjaS3zIb22Uvb9WKhuJObROC-qUpa81U5"
})
});
var vector = new ol.layer.Vector({
source: new ol.source.Vector({
url: "../data/2012-02-10.kml",
format: new ol.format.KML() // 关键
})
});
var map = new ol.Map({
layers: [raster, vector],
target: "map",
view: new ol.View({
center: [876970.8463461736, 5859807.853963373],
projection: "EPSG:3857",
zoom: 10
})
});
var displayFeatureInfo = function (pixel) {
var features = [];
map.forEachFeatureAtPixel(pixel, function (feature) {
features.push(feature);
});
if (features.length > 0) {
var info = [];
var i, ii;
for (i = 0, ii = features.length; i < ii; ++i) {
info.push(features[i].get("name"));
}
document.getElementById("info").innerHTML =
info.join(", ") || "(unknown)";
map.getTarget().style.cursor = "pointer";
} else {
document.getElementById("info").innerHTML = " ";
map.getTarget().style.cursor = "";
}
};
map.on("pointermove", function (evt) {
if (evt.dragging) {
return;
}
var pixel = map.getEventPixel(evt.originalEvent);
displayFeatureInfo(pixel);
});
map.on("click", function (evt) {
displayFeatureInfo(evt.pixel);
});
</script>
</body>
</html>
网友评论