内容概览
1.基于openlayers6结合geoserver实现地图矢量瓦片
2.源代码demo下载
效果图如下:
实现思路:利用Geoserver发布矢量切片服务,然后openlayers调用矢量瓦片服务渲染加载,geoserver发布矢量服务步骤自行百度搜索相关教程,网上很多。最后,通过地图点击事件交互,实现图形高亮以及气泡窗口显示信息详情效果。
具体实现过程
- 利用geoserver发布好的矢量瓦片服务预览效果,直接F12看源码,来对应整合到demo
var geojsonLayer = new ol.layer.Vector({ source: new ol.source.Vector(), style: geoJsonStyle }); var gridsetName = 'EPSG:4326'; var gridNames = ['EPSG:4326:0', 'EPSG:4326:1', 'EPSG:4326:2', 'EPSG:4326:3', 'EPSG:4326:4', 'EPSG:4326:5', 'EPSG:4326:6', 'EPSG:4326:7', 'EPSG:4326:8', 'EPSG:4326:9', 'EPSG:4326:10', 'EPSG:4326:11', 'EPSG:4326:12', 'EPSG:4326:13', 'EPSG:4326:14', 'EPSG:4326:15', 'EPSG:4326:16', 'EPSG:4326:17', 'EPSG:4326:18', 'EPSG:4326:19', 'EPSG:4326:20', 'EPSG:4326:21']; var baseUrl = 'http://localhost:8080/geoserver/gwc/service/wmts';//基础请求URL var style = ''; var format = 'application/vnd.mapbox-vector-tile'; var infoFormat = 'text/html'; var layerName = 'gisSYS:spot'; var projection = new ol.proj.Projection({ code: 'EPSG:4326', units: 'degrees', axisOrientation: 'neu' }); var resolutions = [0.703125, 0.3515625, 0.17578125, 0.087890625, 0.0439453125, 0.02197265625, 0.010986328125, 0.0054931640625, 0.00274658203125, 0.001373291015625, 6.866455078125E-4, 3.4332275390625E-4, 1.71661376953125E-4, 8.58306884765625E-5, 4.291534423828125E-5, 2.1457672119140625E-5, 1.0728836059570312E-5, 5.364418029785156E-6, 2.682209014892578E-6, 1.341104507446289E-6, 6.705522537231445E-7, 3.3527612686157227E-7]; params = { 'REQUEST': 'GetTile', 'SERVICE': 'WMTS', 'VERSION': '1.0.0', 'LAYER': layerName, 'STYLE': style, 'TILEMATRIX': gridsetName + ':{z}', 'TILEMATRIXSET': gridsetName, 'FORMAT': format, 'TILECOL': '{x}', 'TILEROW': '{y}' }; function constructSource() { var url = baseUrl+'?' for (var param in params) { url = url + param + '=' + params[param] + '&'; } url = url.slice(0, -1); var source = new ol.source.VectorTile({ url: url, format: new ol.format.MVT({}), projection: projection, tileGrid: new ol.tilegrid.WMTS({ tileSize: [256,256], origin: [-180.0, 90.0], resolutions: resolutions, matrixIds: gridNames }), wrapX: true }); return source; } var layer = new ol.layer.VectorTile({ source: constructSource() }); var baseLayer = new ol.layer.Tile({ source: new ol.source.TileArcGISRest({ url: 'http://map.geoq.cn/ArcGIS/rest/services/ChinaOnlineStreetPurplishBlue/MapServer' }) }); var view = new ol.View({ center: [0, 0], zoom: 2, projection: projection, extent: [-180.0,-90.0,180.0,90.0] }); var map = new ol.Map({ layers: [ baseLayer, layer, geojsonLayer ], overlays: [overlay], target: 'map', view: view }); map.getView().fit([79.12713276900007,18.240437474000032,121.92670103300003,37.46491935100004], map.getSize());
- 地图点击交互高亮弹窗
//监听地图鼠标移动事件singleclick //map.on('pointermove',function(e) { map.on('singleclick',function(e) { if (e.dragging) { return; } var feature =map.forEachFeatureAtPixel(e.pixel, function(feature) { return feature; }); ……
完整demo源码见小专栏文章尾部:GIS之家小专栏
文章尾部提供源代码下载,对本专栏感兴趣的话,可以关注一波