|  |  | 
 |  |  |         padding: 0; | 
 |  |  |         list-style: none; | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     #cpm { | 
 |  |  |         width: 300px; | 
 |  |  |         height: 100px; | 
 |  |  |         position: absolute; | 
 |  |  |         background-color: #ffffff; | 
 |  |  |         display: none; | 
 |  |  |         left: 50%; | 
 |  |  |         top: 50%; | 
 |  |  |         margin-left: -150px; | 
 |  |  |         margin-top: -50px; | 
 |  |  |         z-index: 11; | 
 |  |  |         color: #000000; | 
 |  |  |         border: 2px solid #FF7F50; | 
 |  |  |         font-size: 28px; | 
 |  |  |         line-height: 100px; | 
 |  |  |         text-align: center; | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     .BMap_top { | 
 |  |  |         display: none; | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     .BMap_center { | 
 |  |  |         display: none; | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     .BMap_bubble_title { | 
 |  |  |         color: white; | 
 |  |  |         font-size: 13px; | 
 |  |  |         font-weight: bold; | 
 |  |  |         text-align: left; | 
 |  |  |         padding-left: 5px; | 
 |  |  |         padding-top: 5px; | 
 |  |  |         background-color: #2DA0EB; | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     .BMap_bubble_content { | 
 |  |  |         background-color: white; | 
 |  |  |         padding-left: 5px; | 
 |  |  |         padding-top: 5px; | 
 |  |  |         padding-bottom: 10px; | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     .BMap_pop img { | 
 |  |  |         top: 45px !important; | 
 |  |  |         left: 220px !important; | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     .BMap_pop div:nth-child(1) div { | 
 |  |  |         display: none; | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     .BMap_pop div:nth-child(3) { | 
 |  |  |         display: none; | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     .BMap_pop div:nth-child(5) { | 
 |  |  |         display: none; | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     .BMap_pop div:nth-child(7) { | 
 |  |  |         display: none; | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     .BMap_pop div:nth-child(9) { | 
 |  |  |         top: 35px !important; | 
 |  |  |         border-radius: 5px; | 
 |  |  |     } | 
 |  |  |  | 
 |  |  | </style> | 
 |  |  |  | 
 |  |  | <body> | 
 |  |  | <div class="main_body"> | 
 |  |  |     <div id="cpm">查无飞行轨迹</div> | 
 |  |  |     <div id="mapCanvas"></div> <!-- 百度地图 --> | 
 |  |  |     <!-- 传sensorInfo,regionCode,regionName,monitorPoint,device--> | 
 |  |  |     <div id="uavTrajectoryParams" style="display: none;"> | 
 |  |  | 
 |  |  |     var sensorInfo = params["sensorInfo"]; | 
 |  |  |     //var map = new BMap.Map("mapCanvas", defaultParam); | 
 |  |  |     var map = new BMap.Map("mapCanvas", {enableMapClick: false}); | 
 |  |  |     map.setCurrentCity("昆山"); | 
 |  |  |     map.setMapStyle(mapStyle); | 
 |  |  |     map.enableScrollWheelZoom(true); // 开启鼠标滚轮缩放 | 
 |  |  |     var navigation = new BMap.NavigationControl({ | 
 |  |  |         anchor: BMAP_ANCHOR_BOTTOM_RIGHT, | 
 |  |  |         type: BMAP_NAVIGATION_CONTROL_LARGE | 
 |  |  |     }); | 
 |  |  |     map.addControl(navigation); | 
 |  |  |     map.addControl(new BMap.ScaleControl()); | 
 |  |  |     if (sensorInfo.length == 0) { | 
 |  |  |         showNoFlightTrajectory(); | 
 |  |  |     } | 
 |  |  |     var trackPoints = []; //用来存放从后台获取到的所有历史轨迹点的数据 | 
 |  |  |     var coincidentPoints = new Array(); | 
 |  |  |     if (sensorInfo.length > 0) { | 
 |  |  |         $.each(sensorInfo, function (item, value) { | 
 |  |  |             trackPoints.push(new BMap.Point(value.e76, value.e77)); | 
 |  |  |             if (typeof (value.经度) == "undefined") { | 
 |  |  |                 showNoFlightTrajectory(); | 
 |  |  |             } else { | 
 |  |  |                 trackPoints.push(new BMap.Point(value.经度.substr(0, value.经度.length - 1), value.纬度.substr(0, value.纬度.length - 1))); | 
 |  |  |             } | 
 |  |  |         }) | 
 |  |  |         for (var i = 0; i < trackPoints.length; i++) { | 
 |  |  |             var startPoint = trackPoints[i]; | 
 |  |  |             var endPoint = trackPoints[i + 1]; | 
 |  |  |             var marker; | 
 |  |  |             var startIcon = new BMap.Icon("/img/start.png", new BMap.Size(48, 48)); | 
 |  |  |             var endIcon = new BMap.Icon("/img/end.png", new BMap.Size(48, 48)); | 
 |  |  |             if (i == 0) { | 
 |  |  |                 map.centerAndZoom(startPoint, 17); | 
 |  |  |                 marker = new BMap.Marker(startPoint, {icon: startIcon, offset: new BMap.Size(0, -20)}); | 
 |  |  |             var distance = parseInt(map.getDistance(startPoint, endPoint)).toFixed(5); | 
 |  |  |             var arrowLength;//两点间箭头长度 | 
 |  |  |             if (distance <= 5) { | 
 |  |  |                 arrowLength = 0; | 
 |  |  |             } else if (distance > 5 && distance <= 10) { | 
 |  |  |                 arrowLength = 2; | 
 |  |  |             } else if (distance <= 100) { | 
 |  |  |                 arrowLength = 5; | 
 |  |  |             } else if (distance > 100 && distance <= 200) { | 
 |  |  |                 arrowLength = 10; | 
 |  |  |             } else if (distance > 200 && distance <= 500) { | 
 |  |  |                 arrowLength = 20; | 
 |  |  |             } else if (distance > 500 && distance <= 1000) { | 
 |  |  |                 arrowLength = 40; | 
 |  |  |             } else if (distance > 1000 && distance <= 2000) { | 
 |  |  |                 arrowLength = 80; | 
 |  |  |             } else if (distance > 2000 && distance <= 3000) { | 
 |  |  |                 arrowLength = 120; | 
 |  |  |             } else if (distance > 3000 && distance <= 10000) { | 
 |  |  |                 arrowLength = 500; | 
 |  |  |             } else if (distance > 10000 && distance <= 20000) { | 
 |  |  |                 arrowLength = 1000; | 
 |  |  |             } else if (distance > 20000 && distance <= 50000) { | 
 |  |  |                 arrowLength = 2500; | 
 |  |  |             } else if (distance > 50000 && distance <= 100000) { | 
 |  |  |                 arrowLength = 5000; | 
 |  |  |             } else if (distance > 100000 && distance <= 200000) { | 
 |  |  |                 arrowLength = 10000; | 
 |  |  |             } else if (distance > 200000 && distance <= 500000) { | 
 |  |  |                 arrowLength = 25000; | 
 |  |  |             } else if (distance > 500000 && distance <= 1000000) { | 
 |  |  |                 arrowLength = 50000; | 
 |  |  |             } else if (distance > 1000000 && distance <= 2000000) { | 
 |  |  |                 arrowLength = 100000; | 
 |  |  |             } else { | 
 |  |  |                 arrowLength = 150000; | 
 |  |  |             } | 
 |  |  |             if (i == trackPoints.length - 1) { | 
 |  |  |                 marker = new BMap.Marker(startPoint, {icon: endIcon, offset: new BMap.Size(0, -20)}); | 
 |  |  |             } else if (i != 0 && i!=trackPoints.length - 1) { | 
 |  |  |                 marker = new BMap.Marker(startPoint); | 
 |  |  |             } | 
 |  |  |             winfowText = "时间:" + sensorInfo[i].uavDate | 
 |  |  |                 + "</br> 经度:" + sensorInfo[i].e76 | 
 |  |  |                 + "</br> 纬度:" + sensorInfo[i].e77 | 
 |  |  |                 + "</br> 高度:" + sensorInfo[i].e78 | 
 |  |  |                 + "</br> 速度x:" + sensorInfo[i].e79 | 
 |  |  |                 + "</br> 速度y:" + sensorInfo[i].e80 | 
 |  |  |                 + "</br> 速度z:" + sensorInfo[i].e81; | 
 |  |  |             (function (x) { | 
 |  |  |                 var infoWindow = new BMap.InfoWindow(winfowText, {enableMessage: false, width: 30, height: 130}); | 
 |  |  |                 marker.addEventListener("click", function () { | 
 |  |  |                     this.openInfoWindow(infoWindow); | 
 |  |  |                 }); | 
 |  |  |             })(i); | 
 |  |  |             map.addOverlay(marker); | 
 |  |  |             var polyline = new BMap.Polyline([ | 
 |  |  |                     startPoint, | 
 |  |  |                     endPoint | 
 |  |  |                 ], | 
 |  |  |                 {strokeColor: "green", strokeWeight: 2, strokeOpacity: 1} | 
 |  |  |                 {strokeColor: "#5298FF", strokeWeight: 5, strokeOpacity: 1} | 
 |  |  |             ); | 
 |  |  |             if(i < trackPoints.length-1){ | 
 |  |  |             if (i < trackPoints.length - 1 && trackPoints.length > 1) { | 
 |  |  |                 map.addOverlay(polyline);// 画两点间线 | 
 |  |  |                 addArrow(polyline, 5, Math.PI / 7); | 
 |  |  |                 if (i == 0) { | 
 |  |  |                     map.centerAndZoom(startPoint, 17); | 
 |  |  |                 } | 
 |  |  |                 addArrow(polyline, arrowLength, Math.PI / 7); | 
 |  |  |             } else if (trackPoints.length == 1) { | 
 |  |  |                 map.centerAndZoom(trackPoints[0], 17); | 
 |  |  |             } | 
 |  |  |             if (coincidentPoints.indexOf(i) > -1) { | 
 |  |  |                 //判断是否已经已经显示过该点的信息,避免重复。 | 
 |  |  |                 continue; | 
 |  |  |             } | 
 |  |  |  | 
 |  |  |             var startIcon = new BMap.Icon("/img/start.png", new BMap.Size(48, 48)); | 
 |  |  |             var endIcon = new BMap.Icon("/img/end.png", new BMap.Size(48, 48)); | 
 |  |  |             var aggregationIcon = new BMap.Icon("/img/aggregation.png", new BMap.Size(48, 48)); | 
 |  |  |             if (i == trackPoints.length - 1) { | 
 |  |  |                 marker = new BMap.Marker(startPoint, {icon: endIcon, offset: new BMap.Size(0, -20)}); | 
 |  |  |             } | 
 |  |  |             if (i == 0) { | 
 |  |  |                 marker = new BMap.Marker(startPoint, {icon: startIcon, offset: new BMap.Size(0, -20)}); | 
 |  |  |             } | 
 |  |  |             if (i != 0 && i != trackPoints.length - 1) { | 
 |  |  |                 marker = new BMap.Marker(startPoint); | 
 |  |  |             } | 
 |  |  |             var count = 0; | 
 |  |  |             var winfowText = | 
 |  |  |                 '<div style="min-height:20px;overflow:auto;max-height:400px;" >'; | 
 |  |  |             var opts = { | 
 |  |  |                 width: 220, | 
 |  |  |                 title: '<h4>无人机信息</h4>', // 信息窗口标题 | 
 |  |  |                 enableMessage: false, //设置允许信息窗发送短息 | 
 |  |  |             } | 
 |  |  |  | 
 |  |  |             for (var j = i + 1; j < trackPoints.length; j++) { | 
 |  |  |                 distance = map.getDistance(trackPoints[i], trackPoints[j]).toFixed(5); | 
 |  |  |                 if (distance <= 1.9) { | 
 |  |  |                     if (coincidentPoints.indexOf(i) == -1) { | 
 |  |  |                         coincidentPoints.push(i); | 
 |  |  |                     } | 
 |  |  |                     coincidentPoints.push(j); | 
 |  |  |                     count++; | 
 |  |  |                     marker = new BMap.Marker(startPoint, {icon: aggregationIcon}); | 
 |  |  |                     winfowTextAdd = '<p id="' + j + '" onclick="openInfo(this)" onmousemove="red(this.id)" onmouseout="black(this.id)">' + "时间:" + sensorInfo[j].时间 + "</p>"; | 
 |  |  |                     winfowText += winfowTextAdd; | 
 |  |  |                 } | 
 |  |  |             } | 
 |  |  |  | 
 |  |  |             if (coincidentPoints.indexOf(i) > -1) { | 
 |  |  |                 winfowText = '<p id="' + i + '" onclick="openInfo(this)" onmousemove="red(this.id)" onmouseout="black(this.id)">' + "时间:" + sensorInfo[i].时间 + "</p>" + winfowText + "</div>"; | 
 |  |  |             } else { | 
 |  |  |                 for (var prop in sensorInfo[i]) { | 
 |  |  |                     if (sensorInfo[i].hasOwnProperty(prop)) { | 
 |  |  |                         winfowText += (prop + ":" + sensorInfo[i][prop] + "</br>"); | 
 |  |  |                     } | 
 |  |  |                 } | 
 |  |  |                 winfowText += "</div>"; | 
 |  |  |             } | 
 |  |  |  | 
 |  |  |             (function (x) { | 
 |  |  |                 var infoWindow = new BMap.InfoWindow(winfowText, opts); | 
 |  |  |                 marker.addEventListener("click", function () { | 
 |  |  |                     this.openInfoWindow(infoWindow); | 
 |  |  |                 }); | 
 |  |  |             })(i); | 
 |  |  |  | 
 |  |  |             function openInfo(e) { | 
 |  |  |                 var point = new BMap.Point(sensorInfo[e.id].经度.substr(0, sensorInfo[e.id].经度.length - 1), sensorInfo[e.id].纬度.substr(0, sensorInfo[e.id].纬度.length - 1)); | 
 |  |  |                 var winfowText1 = | 
 |  |  |                     '<div style="min-height:20px;overflow:auto;max-height:400px;" >'; | 
 |  |  |                 for (var prop in sensorInfo[e.id]) { | 
 |  |  |                     if (sensorInfo[e.id].hasOwnProperty(prop)) { | 
 |  |  |                         winfowText1 += (prop + ":" + sensorInfo[e.id][prop] + "</br>"); | 
 |  |  |                     } | 
 |  |  |                 } | 
 |  |  |                 winfowText1 += "</div>"; | 
 |  |  |                 var infoWindow1 = new BMap.InfoWindow(winfowText1, opts); | 
 |  |  |                 //开启信息窗口 | 
 |  |  |                 map.openInfoWindow(infoWindow1, point); | 
 |  |  |             } | 
 |  |  |  | 
 |  |  |             function red(x) { | 
 |  |  |                 document.getElementById(x).style.color = "#FF1111"; | 
 |  |  |                 document.getElementById(x).style.cursor = "pointer"; | 
 |  |  |             } | 
 |  |  |  | 
 |  |  |             function black(x) { | 
 |  |  |                 document.getElementById(x).style.color = "#000000"; | 
 |  |  |             } | 
 |  |  |  | 
 |  |  |             function openInfoWindow() { | 
 |  |  |                 map.openInfoWindow.apply(map, arguments); //开启信息窗口 | 
 |  |  |             } | 
 |  |  |  | 
 |  |  |             if (count > 0) { | 
 |  |  |                 var lab; | 
 |  |  |                 if (count > 0 && count <= 8) { | 
 |  |  |                     lab = new BMap.Label(count + 1, {position: startPoint, offset: new BMap.Size(-5, -9)}); | 
 |  |  |                 } else if (count > 8 && count <= 98) { | 
 |  |  |                     lab = new BMap.Label(count + 1, {position: startPoint, offset: new BMap.Size(-10, -9)}); | 
 |  |  |                 } else if (count > 98 && count <= 998) { | 
 |  |  |                     lab = new BMap.Label(count + 1, {position: startPoint, offset: new BMap.Size(-14, -9)}); | 
 |  |  |                 } else { | 
 |  |  |                     lab = new BMap.Label(count + 1, {position: startPoint, offset: new BMap.Size(-18, -9)}); | 
 |  |  |                 } | 
 |  |  |                 lab.setStyle({ | 
 |  |  |                     color: "#fff", | 
 |  |  |                     fontSize: "16px", | 
 |  |  |                     backgroundColor: "1", | 
 |  |  |                     border: "0", | 
 |  |  |                     fontWeight: "bold" | 
 |  |  |                 }); | 
 |  |  |                 map.addOverlay(lab); | 
 |  |  |             } | 
 |  |  |             map.addOverlay(marker); | 
 |  |  |         } | 
 |  |  |     } | 
 |  |  |         var longitude; | 
 |  |  |         var latitude; | 
 |  |  |         var point; | 
 |  |  |         if (sensorInfo.length == 0) { | 
 |  |  |             longitude = 120.987287; | 
 |  |  |             latitude = 31.391562; | 
 |  |  |             point = new BMap.Point(longitude, latitude); | 
 |  |  |             map.centerAndZoom(point, 17); | 
 |  |  |             alert("查不到相关数据"); | 
 |  |  |         } | 
 |  |  |         map.setCurrentCity("昆山"); | 
 |  |  |         map.setMapStyle(mapStyle); | 
 |  |  |         map.enableScrollWheelZoom(true); // 开启鼠标滚轮缩放 | 
 |  |  |         var navigation = new BMap.NavigationControl({ | 
 |  |  |             anchor: BMAP_ANCHOR_BOTTOM_RIGHT, | 
 |  |  |             type: BMAP_NAVIGATION_CONTROL_LARGE | 
 |  |  |         }); | 
 |  |  |         map.addControl(navigation); | 
 |  |  |         map.addControl(new BMap.ScaleControl()); | 
 |  |  |  | 
 |  |  |         function addArrow(polyline, length, angleValue) { | 
 |  |  |             var linePoint = polyline.getPath();// 线的坐标串 | 
 |  |  |             var arrowCount = linePoint.length; | 
 |  |  |             for (var i = 1; i < arrowCount; i++) { // 在拐点处绘制箭头 | 
 |  |  |                 var pixelStart = map.pointToPixel(linePoint[i - 1]); | 
 |  |  |                 var pixelEnd = map.pointToPixel(linePoint[i]); | 
 |  |  |                 var angle = angleValue;// 箭头和主线的夹角 | 
 |  |  |                 var r = length; // r/Math.sin(angle)代表箭头长度 | 
 |  |  |                 var delta = 0; // 主线斜率,垂直时无斜率 | 
 |  |  |                 var param = 0; // 代码简洁考虑 | 
 |  |  |                 var pixelTemX, pixelTemY, poMiddleX, poMiddleY;// 临时点坐标 | 
 |  |  |                 var pixelX, pixelY, pixelX1, pixelY1;// 箭头两个点 | 
 |  |  |                 poMiddleX = (pixelEnd.x + pixelStart.x) / 2; | 
 |  |  |                 poMiddleY = (pixelEnd.y + pixelStart.y) / 2; | 
 |  |  |                 if (poMiddleX - pixelStart.x == 0) { // 斜率不存在时 | 
 |  |  |                     pixelTemX = poMiddleX; | 
 |  |  |                     if (poMiddleY > pixelStart.y) { | 
 |  |  |                         pixelTemY = poMiddleY - r; | 
 |  |  |                     } else { | 
 |  |  |                         pixelTemY = poMiddleY + r; | 
 |  |  |                     } | 
 |  |  |                     // 已知直角三角形两个点坐标及其中一个角,求另外一个点坐标算法 | 
 |  |  |                     pixelX = pixelTemX - r * Math.tan(angle); | 
 |  |  |                     pixelX1 = pixelTemX + r * Math.tan(angle); | 
 |  |  |                     pixelY = pixelY1 = pixelTemY; | 
 |  |  |                 } else { // 斜率存在时 | 
 |  |  |                     delta = (poMiddleY - pixelStart.y) / (poMiddleX - pixelStart.x); | 
 |  |  |                     param = Math.sqrt(delta * delta + 1); | 
 |  |  |                     if ((poMiddleX - pixelStart.x) < 0) { // 第二、三象限 | 
 |  |  |                         pixelTemX = poMiddleX + r / param; | 
 |  |  |                         pixelTemY = poMiddleY + delta * r / param; | 
 |  |  |                     } else {  // 第一、四象限 | 
 |  |  |                         pixelTemX = poMiddleX - r / param; | 
 |  |  |                         pixelTemY = poMiddleY - delta * r / param; | 
 |  |  |                     } | 
 |  |  |                     // 已知直角三角形两个点坐标及其中一个角,求另外一个点坐标算法 | 
 |  |  |                     pixelX = pixelTemX + Math.tan(angle) * r * delta / param; | 
 |  |  |                     pixelY = pixelTemY - Math.tan(angle) * r / param; | 
 |  |  |                     pixelX1 = pixelTemX - Math.tan(angle) * r * delta / param; | 
 |  |  |                     pixelY1 = pixelTemY + Math.tan(angle) * r / param; | 
 |  |  |     function addArrow(polyline, length, angleValue) { | 
 |  |  |         var linePoint = polyline.getPath();// 线的坐标串 | 
 |  |  |         var arrowCount = linePoint.length; | 
 |  |  |         for (var i = 1; i < arrowCount; i++) { // 在拐点处绘制箭头 | 
 |  |  |             var pixelStart = map.pointToPixel(linePoint[i - 1]); | 
 |  |  |             var pixelEnd = map.pointToPixel(linePoint[i]); | 
 |  |  |             var angle = angleValue;// 箭头和主线的夹角 | 
 |  |  |             var r = length; // r/Math.sin(angle)代表箭头长度 | 
 |  |  |             var delta = 0; // 主线斜率,垂直时无斜率 | 
 |  |  |             var param = 0; // 代码简洁考虑 | 
 |  |  |             var pixelTemX, pixelTemY, poMiddleX, poMiddleY;// 临时点坐标 | 
 |  |  |             var pixelX, pixelY, pixelX1, pixelY1;// 箭头两个点 | 
 |  |  |             poMiddleX = (pixelEnd.x + pixelStart.x) / 2; | 
 |  |  |             poMiddleY = (pixelEnd.y + pixelStart.y) / 2; | 
 |  |  |             if (poMiddleX - pixelStart.x == 0) { // 斜率不存在时 | 
 |  |  |                 pixelTemX = poMiddleX; | 
 |  |  |                 if (poMiddleY > pixelStart.y) { | 
 |  |  |                     pixelTemY = poMiddleY - r; | 
 |  |  |                 } else { | 
 |  |  |                     pixelTemY = poMiddleY + r; | 
 |  |  |                 } | 
 |  |  |                 var pointArrow = map.pixelToPoint(new BMap.Pixel(pixelX, pixelY)); | 
 |  |  |                 var pointArrow1 = map.pixelToPoint(new BMap.Pixel(pixelX1, pixelY1)); | 
 |  |  |                 var pointMiddle = map.pixelToPoint(new BMap.Pixel(poMiddleX, poMiddleY)); | 
 |  |  |                 var Arrow = new BMap.Polyline([pointArrow, pointMiddle, pointArrow1], | 
 |  |  |                     {strokeColor: "green", strokeWeight: 2, strokeOpacity: 1}); | 
 |  |  |                 map.addOverlay(Arrow); | 
 |  |  |                 // 已知直角三角形两个点坐标及其中一个角,求另外一个点坐标算法 | 
 |  |  |                 pixelX = pixelTemX - r * Math.tan(angle); | 
 |  |  |                 pixelX1 = pixelTemX + r * Math.tan(angle); | 
 |  |  |                 pixelY = pixelY1 = pixelTemY; | 
 |  |  |             } else { // 斜率存在时 | 
 |  |  |                 delta = (poMiddleY - pixelStart.y) / (poMiddleX - pixelStart.x); | 
 |  |  |                 param = Math.sqrt(delta * delta + 1); | 
 |  |  |                 if ((poMiddleX - pixelStart.x) < 0) { // 第二、三象限 | 
 |  |  |                     pixelTemX = poMiddleX + r / param; | 
 |  |  |                     pixelTemY = poMiddleY + delta * r / param; | 
 |  |  |                 } else {  // 第一、四象限 | 
 |  |  |                     pixelTemX = poMiddleX - r / param; | 
 |  |  |                     pixelTemY = poMiddleY - delta * r / param; | 
 |  |  |                 } | 
 |  |  |                 // 已知直角三角形两个点坐标及其中一个角,求另外一个点坐标算法 | 
 |  |  |                 pixelX = pixelTemX + Math.tan(angle) * r * delta / param; | 
 |  |  |                 pixelY = pixelTemY - Math.tan(angle) * r / param; | 
 |  |  |                 pixelX1 = pixelTemX - Math.tan(angle) * r * delta / param; | 
 |  |  |                 pixelY1 = pixelTemY + Math.tan(angle) * r / param; | 
 |  |  |             } | 
 |  |  |         }; | 
 |  |  |             var pointArrow = map.pixelToPoint(new BMap.Pixel(pixelX, pixelY)); | 
 |  |  |             var pointArrow1 = map.pixelToPoint(new BMap.Pixel(pixelX1, pixelY1)); | 
 |  |  |             var pointMiddle = map.pixelToPoint(new BMap.Pixel(poMiddleX, poMiddleY)); | 
 |  |  |             var Arrow = new BMap.Polyline([pointArrow, pointMiddle, pointArrow1], | 
 |  |  |                 {strokeColor: "#5298FF", strokeWeight: 5, strokeOpacity: 1}); | 
 |  |  |             map.addOverlay(Arrow); | 
 |  |  |         } | 
 |  |  |     }; | 
 |  |  |  | 
 |  |  |     function showNoFlightTrajectory() { | 
 |  |  |         var longitude = 120.987287; | 
 |  |  |         var latitude = 31.391562; | 
 |  |  |         var point = new BMap.Point(longitude, latitude); | 
 |  |  |         map.centerAndZoom(point, 17); | 
 |  |  |         setTimeout(function () { | 
 |  |  |             document.getElementById("cpm").style.display = 'block'; | 
 |  |  |         }, 250); | 
 |  |  |     }; | 
 |  |  |  | 
 |  |  | </script> |