OpenLayers之OGC服务加载
手动构造 GetCapabilities、GetMap 的操作链接，并在浏览器里发送HTTP 请求；利用 OpenLayers 进行 WMS 服务加载；
手动构造 GetCapabilities、GetTile 的操作链接，并在浏览器里发送HTTP 请求；利用 OpenLayers 进行 WMTS 服务加载；
手动构造 GetCapabilities、DescribeFeatureType、GetFeature 的操作链接，并在浏览器里发送 HTTP 请求；利用 OpenLayers 进行 WFS 服务加载以及
加载时添加过滤条件。
2.1 利用TileWMS加载WMS
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="./v6.5.0-dist/ol.css">
<script src="./v6.5.0-dist/ol.js"></script>
<style>
html,
body {
height: 100%;
width: 100%;
}
#map {
height: 100%;
width: 100%;
margin: 0%;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
var projection = ol.proj.get('EPSG:4326');//地图投影坐标系
var map = new ol.Map({
target: 'map',
view: new ol.View({
center: [0, 0],
zoom: 2,
}),
layers: [
new ol.layer.Tile({ source: new ol.source.OSM() })]
});
var wmsLayer = new ol.layer.Tile({
source: new ol.source.TileWMS({
url: 'https://ahocevar.com/geoserver/wms',
params: { 'LAYERS': 'topp:states' }
})
});
map.addLayer(wmsLayer)
var mousePositionControl = new ol.control.MousePosition({ projection: 'EPS6:4326' });
map.addControl(mousePositionControl);
</script>
</body>
</html>
2.2 利用ImageWMS加载WMS
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="./v6.5.0-dist/ol.css">
<script src="./v6.5.0-dist/ol.js"></script>
<style>
html,
body {
height: 100%;
width: 100%;
}
#map {
height: 100%;
width: 100%;
margin: 0%;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
var projection = ol.proj.get('EPSG:4326');//地图投影坐标系
var map = new ol.Map({
target: 'map',
view: new ol.View({
center: [0, 0],
zoom: 2,
}),
layers: [
new ol.layer.Tile({ source: new ol.source.OSM() })]
});
var wmsLayer = new ol.layer.Image({
source: new ol.source.ImageWMS({
url: 'https://ahocevar.com/geoserver/wms', params: { 'LAYERS': 'usa:states' }
})
});
map.addLayer(wmsLayer)
var mousePositionControl = new ol.control.MousePosition({ projection: 'EPS6:4326' });
map.addControl(mousePositionControl);
</script>
</body>
</html>
2.3 加载WMTS
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="./v6.5.0-dist/ol.css">
<script src="./v6.5.0-dist/ol.js"></script>
<style>
html,
body,
div {
height: 100%;
width: 100%;
margin: 0%;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
var projection = ol.proj.get("EPSG:4326"); var projectionExtent = projection.getExtent();
var size = ol.extent.getWidth(projectionExtent) / 256; var resolutions = [];
for (var z = 2; z < 19; ++z) {
resolutions[z] = size / Math.pow(2, z);
}
var map = new ol.Map({
layers: [
new ol.layer.Tile({
source: new ol.source.WMTS({
url: "http://t{0-6}.tianditu.gov.cn/vec_c/wmts?tk=1d109683f4d84198e37a38c442d68311",
name: "中国矢量1-4级",
layer: "vec",
style: "default",
matrixSet: "c",
format: "tiles",
wrapX: true,
tileGrid: new ol.tilegrid.WMTS({
origin: ol.extent.getTopLeft(projectionExtent), resolutions: resolutions,
matrixIds: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
})
}),
}),
new ol.layer.Tile({
source: new ol.source.WMTS({
name: "中国矢量注记1-4级",
url: "http://t{0-6}.tianditu.gov.cn/cva_c/wmts?tk=1d109683f4d84198e37a38c442d68311",
layer: "cva",
style: "default",
matrixSet: "c",
format: "tiles",
wrapX: true,
tileGrid: new ol.tilegrid.WMTS({
origin: ol.extent.getTopLeft(projectionExtent), resolutions: resolutions,
matrixIds: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
})
}),
})
],
target: "map",
view: new ol.View({
center: [120.14805, 30.26971], projection: projection,
zoom: 3,
maxZoom: 17, minZoom: 1
})
});
</script>
</body>
</html>
2.4 利用其它格式加载WFS
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="./v6.5.0-dist/ol.css">
<script src="./v6.5.0-dist/ol.js"></script>
<style>
html,
body {
height: 100%;
width: 100%;
}
#map {
height: 100%;
width: 100%;
margin: 0%;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
var projection = ol.proj.get('EPSG:3857');//地图投影坐标系
var map = new ol.Map({
target: 'map',
view: new ol.View({
center: [-8908887.277395891, 5381918.072437216],
zoom: 12,
}),
layers: [
new ol.layer.Tile({ source: new ol.source.OSM() })]
});
var vectorSource = new ol.source.Vector();
var vector = new ol.layer.Vector({
source: vectorSource,
style: new ol.style.Style({
stroke: new ol.style.Stroke({
color: 'rgba(0，0，255,1.0)',
width: 2,
}),
}),
});
var vectorSource = new ol.source.Vector({
format: new ol.format.GeoJSON(),
url: function (extent) {
return (
"https://ahocevar.com/geoserver/wfs?service=WFS&" +
"version=1.1.0&request=GetFeature&typename=osm:water_areas&" +
"outputFormat=application/json&srsname=EPSG:3857&" +
"bbox=" +
extent.join(',') + ',EPSG:3857'
);
},
strategy: ol.loadingstrategy.bboxStrategy,
});
var vector = new ol.layer.Vector({
source: vectorSource,
style: new ol.style.Style({
stroke: new ol.style.Stroke({
color: 'rgba(0, 0，255,1.0)', width: 2,
}),
}),
});
map.addLayer(vector)
var mousePositionControl = new ol.control.MousePosition({ projection: 'EPS6:4326' });
map.addControl(mousePositionControl);
</script>
</body>
</html>
2.5 利用ol.format.WFS加载WFS
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="./v6.5.0-dist/ol.css">
<script src="./v6.5.0-dist/ol.js"></script>
<style>
html,
body {
height: 100%;
width: 100%;
}
#map {
height: 100%;
width: 100%;
margin: 0%;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
var projection = ol.proj.get('EPSG:3857');//地图投影坐标系
var map = new ol.Map({
target: 'map',
view: new ol.View({
center: [-8908887.277395891, 5381918.072437216],
zoom: 12,
}),
layers: [
new ol.layer.Tile({ source: new ol.source.OSM() })]
});
var vectorSource = new ol.source.Vector();
var vector = new ol.layer.Vector({
source: vectorSource,
style: new ol.style.Style({
stroke: new ol.style.Stroke({
color: 'rgba(0，0，255,1.0)',
width: 2,
}),
}),
});
// generate a GetFeature request
var featureRequest = new ol.format.WFS().writeGetFeature({
srsName: 'EPSG:3857',
featureNS: 'http://openstreemap.org',
featurePrefix: 'osm',
featureTypes: ['water_areas'],
outputFormat: 'application/json',
filter: ol.format.filter.and(
ol.format.filter.like('name', 'Mississippi*'),
ol.format.filter.equalTo('waterway', 'riverbank')),
});
// then post the request and add the received features to a layer
fetch(' https://ahocevar.com/geoserver/wfs', {
method: 'POST',
body: new XMLSerializer().serializeToString(featureRequest),
})
.then(function (response) { return response.json(); })
.then(function (json) {
var features = new ol.format.GeoJSON().readFeatures(json);
vectorSource.addFeatures(features);
map.getView().fit(vectorSource.getExtent());
});
map.addLayer(vector)
var mousePositionControl = new ol.control.MousePosition({ projection: 'EPS6:4326' });
map.addControl(mousePositionControl);
</script>
</body>
</html>
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