(转)WKT转换工具terraformers
http://blog.csdn.net/gisshixisheng/article/details/53150111
概述:
前面的文章中,提到了Arcgis中实现wkt转换为geometry,但是这种转换仅实现了简单的点(point)、线(polyline)和面(polygon)的转换,对于复杂点或者复杂多边形没有涉及,在本文讲述通过terraformers加载展示wkt。
terraformers简介:
terraformers是Esri的一个开源项目,主要功能如下:

大家可通过http://download.csdn.NET/detail/gisshixisheng/9681608下载相关的js文件,也可直接在github上下载,github上的地址为https://github.com/Esri/Terraformer。
实现代码:
1、Arcgis加载WKT
- <!DOCTYPE html>
- <html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
- <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
- <title>Hello Map</title>
- <link rel="stylesheet" href="http://localhost/arcgis_js_311/api/arcgis_js_api/library/3.11/3.11/dijit/themes/tundra/tundra.css">
- <link rel="stylesheet" href="http://localhost/arcgis_js_311/api/arcgis_js_api/library/3.11/3.11/esri/css/esri.css"><style>
- html, body, #map {
- height: 100%;
- width: 100%;
- margin: 0;
- padding: 0;
- }
- </style>
- <script src="../../plugin/terraformer/terraformer.js"></script>
- <script src="../../plugin/terraformer/terraformer-wkt-parser.js"></script>
- <script src="../../plugin/terraformer/terraformer-arcgis-parser.js"></script>
- <script src="http://localhost/arcgis_js_311/api/arcgis_js_api/library/3.11/3.11/init.js"></script>
- <script src="../../plugin/jquery/jquery-1.8.3.js"></script>
- <script>
- var map;
- require([ "esri/map",
- "esri/layers/ArcGISTiledMapServiceLayer",
- "esri/layers/GraphicsLayer",
- "esri/graphic",
- "esri/geometry/Point",
- "esri/geometry/jsonUtils",
- "esri/symbols/SimpleMarkerSymbol",
- "esri/symbols/SimpleLineSymbol",
- "esri/symbols/SimpleFillSymbol",
- "esri/Color",
- "dojo/domReady!"
- ],
- function(Map,
- Tiled,
- GraphicsLayer,
- Graphic,
- Point,
- geometryJsonUtils,
- SimpleMarkerSymbol,
- SimpleLineSymbol,
- SimpleFillSymbol,
- Color){
- map = new Map("map");
- var tiled = new Tiled("http://localhost:6080/arcgis/rest/services/lzugis/base_china/MapServer");
- map.addLayer(tiled);
- var mapCenter = new Point(103.847, 36.0473, {"wkid":4326});
- map.centerAndZoom(mapCenter,1);
- var gLayer = new GraphicsLayer();
- map.addLayer(gLayer);
- gLayer.on("click",function(feature){
- console.log(feature);
- });
- var wkts = [
- "POINT(107.5758285931443 29.7822116459692)",
- "LINESTRING(120.18304604073 30.3305841465568,108.805692477062 32.0850224203499)",
- "POLYGON((102.797302689433 36.5936423859273,105.519115206186 29.4789248520356,100.346180647351 19.9699202912212))"
- ];
- map.on("load",function(){
- for(var i=0,len = wkts.length;i<len;i++){
- var primitive = Terraformer.WKT.parse(wkts[i]);
- var arcgis = Terraformer.ArcGIS.convert(primitive);
- var geometry = geometryJsonUtils.fromJson(arcgis);
- var symbol = getSymbol(geometry.type);
- var gfx = new Graphic(geometry,symbol);
- gLayer.add(gfx);
- }
- });
- function getSymbol(geotype){
- var symbol = null;
- if(geotype==="point"){
- symbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.STYLE_CIRCLE, 12,
- new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID,
- new Color([255,0,0]), 1),
- new Color([0,0,255,255]));
- }
- else if(geotype==="polyline"){
- symbol = new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID,
- new Color([255,0,0]), 2);
- }
- else{
- symbol = new SimpleFillSymbol(SimpleFillSymbol.STYLE_SOLID,
- new SimpleLineSymbol(SimpleLineSymbol.STYLE_DASHDOT,
- new Color([255,0,0]), 2),new Color([255,255,0,0.25])
- );
- }
- return symbol;
- }
- });
- </script>
- </head>
- <body>
- <div id="map"></div>
- </body>
- </html>
效果:

2、leaflet加载WKT
- <!DOCTYPE html>
- <html>
- <head lang="en">
- <meta charset="UTF-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
- <title>leaflet</title>
- <link rel="stylesheet" href="../../plugin/leaflet/leaflet.css" type="text/css">
- <style>
- body {
- padding: 0;
- margin: 0;
- }
- html, body, #map {
- height: 100%;
- }
- .leaflet-control-attribution{
- display: none;
- }
- </style>
- <script src="../../plugin/jquery/jquery-1.8.3.js"></script>
- <script src="../../plugin/terraformer/terraformer.js"></script>
- <script src="../../plugin/terraformer/terraformer-wkt-parser.js"></script>
- <script src="../../plugin/leaflet/leaflet.js"></script>
- <script>
- var map;
- $(window).load(function() {
- map = L.map('map').setView([35.851354460363,104.21390114103], 4);//35.851354460363,104.21390114103
- var wms = L.tileLayer.wms("http://localhost:8088/geoserver/lzugis/wms", {
- layers: 'province',
- format: 'image/png',
- transparent: true,
- version:'1.1.1'
- });
- map.addLayer(wms);
- function onEachFeature(feature, layer) {
- var popupContent = "<p>I started out as a WKT " +
- feature.type + ", but now I'm a Leaflet vector!</p>";
- if (feature.properties && feature.properties.popupContent) {
- popupContent += feature.properties.popupContent;
- }
- layer.bindPopup(popupContent);
- }
- var wkts = [
- "POINT(107.5758285931443 29.7822116459692)",
- "LINESTRING(120.18304604073 30.3305841465568,108.805692477062 32.0850224203499)",
- "POLYGON((102.797302689433 36.5936423859273,105.519115206186 29.4789248520356,100.346180647351 19.9699202912212))"
- ];
- var geojsons = [];
- for(var i=0,len = wkts.length;i<len;i++){
- var geojson = Terraformer.WKT.parse(wkts[i]);
- geojsons.push(geojson);
- }
- var layer = L.geoJson(geojsons, {onEachFeature: onEachFeature}).addTo(map);
- });
- </script>
- </head>
- <body>
- <div id="map"></div>
- </body>
- </html>
效果:

--------------------------------------------
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