config.xml文件的配置如下：

源代码目录如下：

 

 地图坐标系模块的源代码原理解析，详细的代码在下载的开源flexviewer自带的：

（1）CoordinateWidget.xml

        

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(2)CoordinateWidget.mxml

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//下面是读取CoordinateWidget.xml配置文件的资源，要是配置了的话 41 const decimalSeparator:String = configXML.numberformatter.@decimalseparator; 42 numberFormatter.decimalSeparatorTo = decimalSeparator ? decimalSeparator : "."; 43 const thousandsSeparator:String = configXML.numberformatter.@thousandsseparator; 44 numberFormatter.thousandsSeparatorTo = thousandsSeparator ? thousandsSeparator : ","; 45 numberFormatter.useThousandsSeparator = configXML.numberformatter.@usethousandsseparator == "true"; 46 numberFormatter.precision = parseFloat(configXML.numberformatter.@precision || "-1"); 47 const rounding:String = configXML.numberformatter.@rounding; 48 numberFormatter.rounding = rounding ? rounding : NumberBaseRoundType.NONE; 49 //获取设置坐标显示的字体和颜色样式等 50 const color:String = configXML.labelstyle.@color[0] || configXML.label.@color[0]; 51 coords.setStyle("color", toNumber(color ? color : "0x000000")); 52 const fontFamily:String = configXML.labelstyle.@fontfamily[0] || configXML.label.@fontfamily[0]; 53 coords.setStyle("fontFamily", fontFamily ? fontFamily : "Verdana"); 54 const fontSize:String = configXML.labelstyle.@fontsize[0] || configXML.label.@fontsize[0]; 55 coords.setStyle("fontSize", parseInt(fontSize ? fontSize : "9")); 56 const fontWeight:String = configXML.labelstyle.@fontweight[0] || configXML.label.@fontweight[0]; 57 coords.setStyle("fontWeight", fontWeight ? fontWeight : "bold"); 58 59 // If no template specified, show them with a space in between (except for special case below) 60 m_template = configXML.labels.template[0] || configXML.label.@template[0] || "{0} {1}"; 61 62 if (map.loaded) 63 { 64 map_loadHandler(null); 65 } 66 else 67 { 68 map.addEventListener(MapEvent.LOAD, map_loadHandler);//加载地图 69 } 70 } 71 72 function map_loadHandler(event:MapEvent):void 73 { 74 map.removeEventListener(MapEvent.LOAD, map_loadHandler); 75 const wkid:int = map.spatialReference.wkid; //获取地图的空间坐标参考系 76 m_func = substitute; 77 const outputUnit:String = configXML.outputunit;//获取地图的坐标显示单位，从配置文件获取 78 if (outputUnit === "mercator")//判断地图的坐标体系，墨卡托情况下执行 79 { 80 if (wkid === 4326 || wkid === 4269 || wkid === 4267) 81 { 82 m_func = geographicToMercator;//调用地理坐标系转换墨卡托坐标系 83 } 84 } 85 else if (outputUnit === "geo")//地理坐标系情况下执行 86 { 87 if (wkid === 102100 || wkid === 102113 || wkid === 3857) 88 { 89 m_func = mercatorToGeographic;//调用墨卡托坐标系转换地理坐标系 90 // special default for geographic outputs 91 m_template = configXML.labels.template[0] || configXML.label.@template[0] || getDefaultString("latitudeLabel") + ":{1} " + getDefaultString("longitudeLabel") + ":{0}";//设置坐标显示的文字，比如经度，纬度 92 numberFormatter.precision = parseFloat(configXML.numberformatter.@precision || "6");//设置坐标显示的位数 93 } 94 else if (wkid === 4326 || wkid === 4269 || wkid === 4267) 95 { 96 // special default for geographic outputs 97 m_template = configXML.labels.template[0] || configXML.label.@template[0] || getDefaultString("latitudeLabel") + ":{1} " + getDefaultString("longitudeLabel") + ":{0}"; 98 numberFormatter.precision = parseFloat(configXML.numberformatter.@precision || "6"); 99 }100 }101 else if (outputUnit === "dms")//经纬度显示单位为度分秒形式情况下执行102 {103 if (wkid === 102100 || wkid === 102113 || wkid === 3857)104 {105 m_func = mercatorToDMS;106 }107 else if (wkid === 4326 || wkid === 4269 || wkid === 4267)108 {109 m_func = geographicToDMS;110 }111 }112 map.addEventListener(MouseEvent.MOUSE_MOVE, map_mouseMoveHandler);//监听地图鼠标移动事件，用来获取地图经纬度的113 }114 }115 116 private function toNumber(value:String):int//转换单位计算117 {118 if (value.substr(0, 2) == "0x")119 {120 return parseInt(value, 16);121 }122 return parseInt(value, 10);123 }124 125 private function mercatorToGeographic(web:MapPoint):String//墨卡托转换地理坐标系的函数126 {127 const geo:MapPoint = WebMercatorUtil.webMercatorToGeographic(web) as MapPoint;//arcgis api封装好的转换函数128 return StringUtil.substitute(m_template,129 numberFormatter.format(geo.x),130 numberFormatter.format(geo.y));131 }132 133 private function mercatorToDMS(web:MapPoint):String//墨卡托转换经纬度度分秒形式的函数134 {135 const geo:MapPoint = WebMercatorUtil.webMercatorToGeographic(web) as MapPoint; 136 return StringUtil.substitute(m_template, DegToDMS.format(geo.x, DegToDMS.LON), DegToDMS.format(geo.y, DegToDMS.LAT));137 }138 139 private function geographicToMercator(geo:MapPoint):String//地理坐标系转换墨卡托的函数140 {141 const web:MapPoint = WebMercatorUtil.geographicToWebMercator(geo) as MapPoint;142 return StringUtil.substitute(m_template,143 numberFormatter.format(web.x),144 numberFormatter.format(web.y));145 }146 147 private function substitute(mapPoint:MapPoint):String148 {149 return StringUtil.substitute(m_template,150 numberFormatter.format(mapPoint.x),151 numberFormatter.format(mapPoint.y));152 }153 154 private function geographicToDMS(mapPoint:MapPoint):String155 {156 const x:String = DegToDMS.format(mapPoint.x, DegToDMS.LON);157 const y:String = DegToDMS.format(mapPoint.y, DegToDMS.LAT);158 return StringUtil.substitute(m_template, x, y);159 }160 161 private function map_mouseMoveHandler(event:MouseEvent):void162 {163 const mapPoint:MapPoint = map.toMapFromStage(event.stageX, event.stageY);//获取鼠标移动的地图经纬度164 coords.text = m_func(mapPoint);165 }166 ]]>167

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//显示经纬度的位置，显示label180