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Openlayers2唯一值渲染

來源:程序員人生   發布時間:2016-07-26 13:47:03 閱讀次數:4927次

概述

本文講述Openlayers2中實現唯1值渲染。


效果



源代碼

<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF⑻"> <title>openlayers map</title> <link rel="stylesheet" href="../../../plugin/OpenLayers⑵.13.1/theme/default/style.css" type="text/css"> <style> html, body, #map{ padding:0; margin:0; height:100%; width:100%; overflow: hidden; } </style> <script src="../../../plugin/OpenLayers⑵.13.1/OpenLayers.js"></script> <script src="../../../plugin/jquery/jquery⑴.8.3.js"></script> <script> var map; var tiled; OpenLayers.IMAGE_RELOAD_ATTEMPTS = 5; OpenLayers.DOTS_PER_INCH = 25.4 / 0.28; $(window).load(function() { var format = 'image/png'; var bounds = new OpenLayers.Bounds( 73.45100463562233, 18.16324718764174, 134.97679764650596, 53.531943152223576 ); var options = { controls: [], maxExtent: bounds, maxResolution: 0.2403351289487642, projection: "EPSG:4326", units: 'degrees' }; map = new OpenLayers.Map('map', options); tiled = new OpenLayers.Layer.WMS( "Geoserver layers - Tiled", "http://localhost:8088/geoserver/lzugis/wms", { "LAYERS": 'province', "STYLES": '', format: format }, { buffer: 0, displayOutsideMaxExtent: true, isBaseLayer: true, yx : {'EPSG:4326' : true} } ); map.addLayers([tiled]); OpenLayers.INCHES_PER_UNIT["千米"] = OpenLayers.INCHES_PER_UNIT["km"]; OpenLayers.INCHES_PER_UNIT["米"] = OpenLayers.INCHES_PER_UNIT["m"]; OpenLayers.INCHES_PER_UNIT["英里"] = OpenLayers.INCHES_PER_UNIT["mi"]; OpenLayers.INCHES_PER_UNIT["英寸"] = OpenLayers.INCHES_PER_UNIT["ft"]; //比例尺 map.addControl(new OpenLayers.Control.ScaleLine({topOutUnits:"千米",topInUnits:"米",bottomOutUnits:"英里", bottomInUnits:"英寸" })); map.addControl(new OpenLayers.Control.Zoom()); map.addControl(new OpenLayers.Control.Navigation()); map.addControl(new OpenLayers.Control.OverviewMap()); map.zoomToExtent(bounds); var styleMap = new OpenLayers.StyleMap(null,{ "select": new OpenLayers.Style({ fillColor: "#ffffff", strokeColor: "#00ffff", graphicZIndex: 2, opacity:0 }) }); var lookup = { "230000":{fillColor: "#386d2c", strokeColor: "#ffffff",strokeWidth: 1}, "650000":{fillColor: "#db152e", strokeColor: "#ffffff",strokeWidth: 1}, "140000":{fillColor: "#7615d8", strokeColor: "#ffffff",strokeWidth: 1}, "640000":{fillColor: "#7e3c72", strokeColor: "#ffffff",strokeWidth: 1}, "540000":{fillColor: "#2482b4", strokeColor: "#ffffff",strokeWidth: 1}, "370000":{fillColor: "#db79f6", strokeColor: "#ffffff",strokeWidth: 1}, "410000":{fillColor: "#9841fc", strokeColor: "#ffffff",strokeWidth: 1}, "320000":{fillColor: "#05bc8c", strokeColor: "#ffffff",strokeWidth: 1}, "340000":{fillColor: "#81fac1", strokeColor: "#ffffff",strokeWidth: 1}, "420000":{fillColor: "#68e436", strokeColor: "#ffffff",strokeWidth: 1}, "330000":{fillColor: "#6f7d48", strokeColor: "#ffffff",strokeWidth: 1}, "360000":{fillColor: "#9f7083", strokeColor: "#ffffff",strokeWidth: 1}, "430000":{fillColor: "#48c89c", strokeColor: "#ffffff",strokeWidth: 1}, "530000":{fillColor: "#e0d9a7", strokeColor: "#ffffff",strokeWidth: 1}, "520000":{fillColor: "#25e635", strokeColor: "#ffffff",strokeWidth: 1}, "350000":{fillColor: "#78bcde", strokeColor: "#ffffff",strokeWidth: 1}, "450000":{fillColor: "#b8c7e9", strokeColor: "#ffffff",strokeWidth: 1}, "440000":{fillColor: "#451cd3", strokeColor: "#ffffff",strokeWidth: 1}, "460000":{fillColor: "#bad932", strokeColor: "#ffffff",strokeWidth: 1}, "220000":{fillColor: "#3d57ff", strokeColor: "#ffffff",strokeWidth: 1}, "210000":{fillColor: "#dca16f", strokeColor: "#ffffff",strokeWidth: 1}, "120000":{fillColor: "#eb7131", strokeColor: "#ffffff",strokeWidth: 1}, "630000":{fillColor: "#beb4c0", strokeColor: "#ffffff",strokeWidth: 1}, "620000":{fillColor: "#449338", strokeColor: "#ffffff",strokeWidth: 1}, "610000":{fillColor: "#7dd64c", strokeColor: "#ffffff",strokeWidth: 1}, "150000":{fillColor: "#3e9c10", strokeColor: "#ffffff",strokeWidth: 1}, "500000":{fillColor: "#cf4d49", strokeColor: "#ffffff",strokeWidth: 1}, "130000":{fillColor: "#fd1253", strokeColor: "#ffffff",strokeWidth: 1}, "310000":{fillColor: "#7ea79a", strokeColor: "#ffffff",strokeWidth: 1}, "110000":{fillColor: "#eb01b6", strokeColor: "#ffffff",strokeWidth: 1}, "710000":{fillColor: "#97d24c", strokeColor: "#ffffff",strokeWidth: 1}, "810000":{fillColor: "#46d4e7", strokeColor: "#ffffff",strokeWidth: 1}, "820000":{fillColor: "#09158f", strokeColor: "#ffffff",strokeWidth: 1}, "510000":{fillColor: "#583957", strokeColor: "#ffffff",strokeWidth: 1} }; styleMap.addUniqueValueRules("default", "dzm", lookup); var vector_layer = new OpenLayers.Layer.Vector("pro",{ styleMap: styleMap }); map.addLayer(vector_layer); $("#geojson").on("click",function(){ $.get("data/province.geojson",null,function(result){ result = eval("("+result+")"); var geojson_format = new OpenLayers.Format.GeoJSON(); vector_layer.addFeatures(geojson_format.read(result)); }); }); }); </script> </head> <body> <div id="map"> <div style="position: absolute;top: 10pt;right: 10pt;z-index: 999;background: #fff;border: 1px solid #f00;padding: 10px;"> <button id="geojson">Unique Value Render</button> </div> </div> </body> </html>


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