ArcGIS api for javascript—測量，測距問題

標籤：imp   空間   win   url   let   rpo   tle   etc   ase   

首先量測

  var map, toolbar, geometryService ;      function init() {             map=new esri.Map("map",{          extent:new esri.geometry.Extent({xmin:110,ymin:31 ,xmax:117 ,ymax :37,spatialReference:{wkid:4326} })     });//選取的空間座標系範圍         dojo.connect(map, "onLoad", initToolbar);               map.addLayer(new esri.layers.ArcGISTiledMapServiceLayer("url");             } function initToolbar(map) {               toolbar = new esri.toolbars.Draw(map);                 //添加toolbar畫圖完成後事件監聽調用    doMeasure        dojo.connect(toolbar, "onDrawEnd", doMeasure);        //執行個體化GeometryService，地址為ags發布的GeometryServer         var geomrtryserver ="url2";        geometryService = new esri.tasks.GeometryService(geomrtryserver);       }

　　

//量測function measutreLength() {      toolbar.activate(esri.toolbars.Draw.POLYLINE);      }  function measutreArea() {toolbar.activate(esri.toolbars.Draw.POLYGON);}

　

//量算  function doMeasure(geometry) {      //更加類型設定顯示樣式      measuregeometry = geometry;       toolbar.deactivate();      switch (geometry.type) {          case "polyline":              var symbol = new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID, new dojo.Color([0, 0, 0]), 2);              break;          case "polygon":              var symbol = new esri.symbol.SimpleFillSymbol(esri.symbol.SimpleFillSymbol.STYLE_NONE, new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_DASHDOT, new dojo.Color([255, 0, 0]), 2), new dojo.Color([255, 255, 0, 0.25]));              break;      }      //設定樣式      var graphic = new esri.Graphic(geometry,symbol);      //清除上一次的畫圖內容      map.graphics.clear();      map.graphics.add(graphic);      //進行投影轉換，完成後調用projectComplete      MeasureGeometry(geometry);  }    //投影轉換完成後調用方法  function MeasureGeometry(geometry) {      //如果為線類型就進行lengths距離測算      if (geometry.type == "polyline") {          var lengthParams = new esri.tasks.LengthsParameters();          lengthParams.polylines = [geometry];          lengthParams.lengthUnit = esri.tasks.GeometryService.UNIT_METER;          lengthParams.geodesic = true;          lengthParams.polylines[0].spatialReference = new esri.SpatialReference(4326);          geometryService.lengths(lengthParams);          dojo.connect(geometryService, "onLengthsComplete", outputDistance);      }      //如果為面類型需要先進行simplify操作在進行面積測算      else if (geometry.type == "polygon") {          var areasAndLengthParams = new esri.tasks.AreasAndLengthsParameters();          areasAndLengthParams.lengthUnit = esri.tasks.GeometryService.UNIT_METER;          areasAndLengthParams.areaUnit = esri.tasks.GeometryService.UNIT_SQUARE_METERS;          this.outSR = new esri.SpatialReference({ wkid: 102113 });          geometryService.project([geometry], this.outSR, function (geometry) {              geometryService.simplify(geometry, function (simplifiedGeometries) {                  areasAndLengthParams.polygons = simplifiedGeometries;                  areasAndLengthParams.polygons[0].spatialReference = new esri.SpatialReference(102113);                  geometryService.areasAndLengths(areasAndLengthParams);              });          });          dojo.connect(geometryService, "onAreasAndLengthsComplete", outputAreaAndLength);      }  }    //顯示測量距離  function outputDistance(result) {      var CurX = measuregeometry.paths[0][measuregeometry.paths[0].length - 1][0];      var CurY = measuregeometry.paths[0][measuregeometry.paths[0].length - 1][1];      var  CurPos  =  new  esri.geometry.Point(CurX,  CurY, map.spatialReference);      map.infoWindow.setTitle("距離測量");      map.infoWindow.setContent(" 測 量 長 度 ： <strong>" + parseInt(String(result.lengths[0])) + "米</strong>");      map.infoWindow.show(CurPos);  }    //顯示測量面積  function outputAreaAndLength(result) {      var CurX = (measuregeometry._extent.xmax + measuregeometry._extent.xmin) / 2;      var CurY = (measuregeometry._extent.ymax + measuregeometry._extent.ymin) / 2      var CurPos = new esri.geometry.Point(CurX, CurY, map.spatialReference);      map.infoWindow.setTitle("面積測量");      map.infoWindow.setContent(" 面積 ： <strong>" + parseInt(String(result.areas[0])) + "平方米</strong> 周長：" + parseInt(String(result.lengths[0])) + "米");      map.infoWindow.show(CurPos);      //alert("面積：" + dojo.number.format(result.areas[0]) + "平方米" + " 長度：" + dojo.number.format(result.lengths[0]) + "米");  }  

　　

　

ArcGIS api for javascript—測量，測距問題