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 1048.html ，对应的 官网示例 https://openlayers.org/en/latest/examples/gpx.html
image.png
image.png
<!DOCTYPE html>
<html>
<head>
<title>GPX</title>
<link rel="stylesheet" href="../include/ol.css" type="text/css" />
<link rel="stylesheet" href="../include/bootstrap.css" type="text/css" />
<script src="../include/jquery.js"></script>
<script src="../include/ol.js"></script>
<script src="../include/bootstrap.min.js"></script>
</head>
<style>
</style>
<body>
<div id="info"> </div>
<div id="map" class="map"></div>
<script>
// 必应瓦片地图
var raster = new ol.layer.Tile({
source: new ol.source.BingMaps({
imagerySet: 'Aerial',
key: 'As1HiMj1PvLPlqc_gtM7AqZfBL8ZL3VrjaS3zIb22Uvb9WKhuJObROC-qUpa81U5'
})
});
// 样式
var style = {
'Point': new ol.style.Style({
image: new ol.style.Circle({
fill: new ol.style.Fill({
color: 'rgba(255,255,0,0.4)'
}),
radius: 5,
stroke: new ol.style.Stroke({
color: '#ff0',
width: 1
})
})
}),
'LineString': new ol.style.Style({
stroke: new ol.style.Stroke({
color: '#f00',
width: 3
})
}),
'MultiLineString': new ol.style.Style({
stroke: new ol.style.Stroke({
color: '#0f0',
width: 3
})
})
};
// 矢量图层
var vector = new ol.layer.Vector({
source: new ol.source.Vector({
// GPX数据路径
url: '../data/fells_loop.gpx',
// 指定数据格式为GPX
format: new ol.format.GPX()
}),
// 根据几何类型获取相应样式
style: function (feature) {
return style[feature.getGeometry().getType()];
}
});
var map = new ol.Map({
layers: [raster, vector],
target: document.getElementById('map'),
view: new ol.View({
center: [-7916041.528716288, 5228379.045749711],
zoom: 12
})
});
var info = $("#info");
info.tooltip({
animation: false,
trigger: "manual"
});
// 显示要素信息
var displayFeatureInfo = function (pixel) {
var features = [];
// 根据像素来获取要素并把它添加到features数组中
map.forEachFeatureAtPixel(pixel, function (feature) {
features.push(feature);
});
// 如果有要素则显示要素信息，并设置鼠标指针样式
if (features.length > 0) {
var info = [];
var i, ii;
for (i = 0, ii = features.length; i < ii; ++i) {
info.push(features[i].get('desc'));
}
document.getElementById('info').innerHTML = info.join(', ') || '(unknown)';
map.getTarget().style.cursor = 'pointer';
} else {
document.getElementById('info').innerHTML = ' ';
map.getTarget().style.cursor = '';
}
};
// 当鼠标指针移到点要素上时显示要素信息
map.on('pointermove', function (evt) {
if (evt.dragging) {
return;
}
var pixel = map.getEventPixel(evt.originalEvent);
displayFeatureInfo(pixel);
});
// 鼠标单击时显示要素信息
map.on('click', function (evt) {
displayFeatureInfo(evt.pixel);
});
</script>
</body>
</html>
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