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brainstorming
You MUST use this before any creative work - creating features, building components, adding functionality, modifying behavior, or planning anything new, in software or out of it (a talk, a business, a renovation).
openlayersUse when adding interactive 2D maps to web applications — WMS/WFS/WMTS layers, vector styling, map controls, popups. OpenLayers: the most full-featured open-source JavaScript web mapping library.
Independent GitHub snapshot · Automated classification · Original documentation governs
name: openlayers description: "Use when adding interactive 2D maps to web applications — WMS/WFS/WMTS layers, vector styling, map controls, popups. OpenLayers: the most full-featured open-source JavaScript web mapping library." tags:
项目地址: https://github.com/openlayers/openlayers
官方文档: https://openlayers.org/doc/
API 参考: https://openlayers.org/en/latest/apidoc/
示例: https://openlayers.org/en/latest/examples/
最新稳定版: 10.10.0(npm
ol,截至2026年)许可证: BSD-2-Clause
OpenLayers(OL)特性:
npm install ol
import 'ol/ol.css';
import Map from 'ol/Map.js';
import View from 'ol/View.js';
import TileLayer from 'ol/layer/Tile.js';
import OSM from 'ol/source/OSM.js';
const map = new Map({
target: 'map',
layers: [new TileLayer({ source: new OSM() })],
view: new View({ center: [12968000, 4863000], zoom: 10 }) // EPSG:3857
});
| 类 | 作用 |
|---|---|
Map | 顶层容器 |
View | 视图(投影、中心、缩放、旋转) |
Layer | 图层 |
Source | 数据源 |
Feature / Geometry | 矢量要素与几何 |
Style | 样式 |
Interaction | 交互 |
import XYZ from 'ol/source/XYZ.js';
import TileWMS from 'ol/source/TileWMS.js';
new TileLayer({ source: new XYZ({
url: 'https://webst02.is.autonavi.com/appmaptile?style=6&x={x}&y={y}&z={z}'
}) });
new TileLayer({ source: new TileWMS({
url: 'http://localhost:8080/geoserver/wms',
params: { LAYERS: 'topp:states', TILED: true }
}) });
import VectorLayer from 'ol/layer/Vector.js';
import VectorSource from 'ol/source/Vector.js';
import GeoJSON from 'ol/format/GeoJSON.js';
map.addLayer(new VectorLayer({
source: new VectorSource({
url: '/data/poi.geojson',
format: new GeoJSON()
})
}));
import VectorTileLayer from 'ol/layer/VectorTile.js';
import VectorTileSource from 'ol/source/VectorTile.js';
import MVT from 'ol/format/MVT.js';
new VectorTileLayer({
declutter: true,
source: new VectorTileSource({
format: new MVT(),
url: 'https://server/tiles/{z}/{x}/{y}.pbf'
})
});
import { Style, Fill, Stroke, Circle, Text } from 'ol/style.js';
const style = new Style({
fill: new Fill({ color: 'rgba(255,0,0,0.3)' }),
stroke: new Stroke({ color: '#f00', width: 2 }),
image: new Circle({ radius: 6, fill: new Fill({ color: '#f00' }) })
});
layer.setStyle(feature => new Style({
fill: new Fill({ color: feature.get('pop') > 1e7 ? '#f00' : '#0a0' }),
text: new Text({ text: feature.get('name'), font: '12px sans-serif' })
}));
import { fromLonLat, toLonLat, transform } from 'ol/proj.js';
import proj4 from 'proj4';
import { register } from 'ol/proj/proj4.js';
map.getView().setCenter(fromLonLat([116.397, 39.908]));
proj4.defs('EPSG:4490', '+proj=longlat +ellps=GRS80 +no_defs');
register(proj4);
import Draw from 'ol/interaction/Draw.js';
import Modify from 'ol/interaction/Modify.js';
import Select from 'ol/interaction/Select.js';
import Snap from 'ol/interaction/Snap.js';
const source = new VectorSource();
map.addLayer(new VectorLayer({ source }));
const draw = new Draw({ source, type: 'Polygon' });
map.addInteraction(draw);
draw.on('drawend', e => console.log(e.feature.getGeometry().getCoordinates()));
map.addInteraction(new Modify({ source }));
map.addInteraction(new Snap({ source }));
const select = new Select();
map.addInteraction(select);
select.on('select', e => console.log(e.selected));
import { getLength, getArea } from 'ol/sphere.js';
draw.on('drawend', e => console.log(getLength(e.feature.getGeometry())));
import Overlay from 'ol/Overlay.js';
const popup = new Overlay({
element: document.getElementById('popup'),
positioning: 'bottom-center', offset: [0, -10]
});
map.addOverlay(popup);
map.on('singleclick', e => {
map.forEachFeatureAtPixel(e.pixel, f => {
popup.setPosition(e.coordinate);
document.getElementById('popup').innerText = f.get('name');
});
});
import Cluster from 'ol/source/Cluster.js';
const clusterSource = new Cluster({ distance: 40, source: pointSource });
new VectorLayer({ source: clusterSource, style: clusterStyleFn });
WebGLPointsLayer 或 MVTaddFeatures([]) 而非循环 addFeaturedeclutter: true 自动避让标注renderMode: 'image' 用于不变的矢量图层| 问题 | 解决 |
|---|---|
| 中心点偏移 | 投影未对齐:fromLonLat() 转换 |
| WMS 不显示 | 检查 CORS、LAYERS 名、SRS 参数 |
| 字体未生效 | 加载字体后再创建 Text 样式 |
| MVT 字段缺失 | 使用 MVT({ featureClass: Feature }) |
new Map({ target, layers, view }) → 设置投影和初始中心TileLayer + OSM/XYZ/TileWMS SourceVectorLayer + VectorSource + GeoJSON/MVT FormatStyle 函数按属性动态渲染Draw/Modify/Select/Snap Interactiondeclutter 避让标注、renderMode: 'image' 静态图层fromLonLat() 转为 EPSG:3857;自定义投影需注册 proj4LAYERS 参数需使用完整名称(如 workspace:layer),检查 CORSfeatureClass: Feature 保留属性addFeatures([]) 而非循环 addFeature,显著提升性能