住建部关于epc总承包文件/沧州网站推广优化

<script> var geojsonLayer = null; var map = L.map('map'); L.tileLayer('http://map.geoq.cn/ArcGIS/rest/services/ChinaOnlineStreetPurplishBlue/MapServer/tile/{z}/{y}/{x}',{crossOrigin:true}).addTo(map); map.setView(L.latLng(22.95186415, 113.90271877), 14);  //设置缩放级别及中心点 map.pm.addControls({ position: 'topleft', drawCircle: false, drawMarker:false, drawCircleMarker:false, drawPolyline:false, drawRectangle:false, drawPolygon:false, cutPolygon:false, removalMode:false, editMode:false, dragMode:false }); //参考截图插件:https://github.com/tsayen/dom-to-image var node = document.getElementById('map'); $("#mapexport_btn").click(function(){ domtoimage.toJpeg(node, { quality: 1.0 }) .then(function (dataUrl) { var link = document.createElement('a'); link.download = '全图导出.jpeg'; link.href = dataUrl; link.click(); }); }); $("#rctanglexport_btn").click(function(){ //绘制矩形 map.pm.enableDraw("Rectangle", { finishOn: "dblclick", allowSelfIntersection: false, tooltips: false }); }); map.on('pm:create', e => { //console.log(e); geojsonLayer = e.layer; geojsonLayer.addTo(map); var northEast =  e.layer.getBounds()._northEast; var southWest =  e.layer.getBounds()._southWest; //框选矩形的中心点 var centerPoint = L.latLng( (northEast.lat + southWest.lat) / 2.0, (northEast.lng + southWest.lng) / 2.0 ); //地理坐标转换屏幕坐标 var northEastPoint = map.latLngToContainerPoint(northEast); var southWestPoint = map.latLngToContainerPoint(southWest); …………if(geojsonLayer){ map.removeLayer(geojsonLayer); geojsonLayer = null; } domtoimage .toPng(node) .then(function(dataUrl) { if (dataUrl.length <= 6) { console.log("屏幕截图结果为空,建议放大地图,重新截图操作试试看"); return; } //过渡img图片,为了截取img指定位置的截图需要 var img = new Image(); img.src = dataUrl; img.onload = function() { …………}; }) .catch(function(error) { console.error("oops, something went wrong!", error); }); }); 
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