工业级后台API v2
blame | history | patch | commit | commitdiff | ignore whitespace
ZhuDongming
2020-06-30 67a7a24b47d71dd843dd0b17c5cdf9f519e29d5d 
 src/main/webapp/view/pollutionsource.jsp


@@ -104,7 +104,7 @@


        top: 30px;


        right: 50px;


        display: inline-block;


        width: 80px;


        width: 100px;


        height: 40px;


        border-width: 0px;


        border-radius: 3px;


@@ -122,8 +122,8 @@




<body>


<div class="main_body">


    <input type="button" id="show" value="计算"/>


    <div id="cpm">无法推测来源</div>


    <input type="button" id="show" value="溯源运算"/>


    <div id="cpm"></div>


    <div id="mapCanvas"></div> <!-- 百度地图 -->


    <!-- 传sensorInfo,regionCode,regionName,monitorPoint,device-->


    <div id="pollutionSourceParams" style="display: none;">


@@ -157,79 +157,137 @@


    var latitude = params["device"]["latitude"];


    var point = new BMap.Point(longitude, latitude);


    var icon = new BMap.Icon("/img/ico00.png", new BMap.Size(50, 50));


    var icon1 = new BMap.Icon("/img/ico01.png", new BMap.Size(50, 50));


    var icon2 = new BMap.Icon("/img/ico02.png", new BMap.Size(50, 50));


    var marker = new BMap.Marker(point, {icon: icon, offset: new BMap.Size(0, -20)});


    map.addOverlay(marker);


    map.centerAndZoom(point, 16);




    var humidity = 0;


    var temperature = 0;


    if (!$.isEmptyObject(dirPoint) && !$.isEmptyObject(getPollutionSourceData) && typeof (getPollutionSourceData["e18"]) != "undefined" && typeof (getPollutionSourceData["e23"]) != "undefined" && getPollutionSourceData["e18"] != 0) {


        var windSpeed = parseFloat(getPollutionSourceData["e18"]);


        var windDir = parseFloat(getPollutionSourceData["e23"]);


        var distance = windSpeed * 3600;


        var winDirStart = 255 - windDir;


        var winDirEnd = 285 - windDir;


        var marker1 = new BMap.Marker(EOffsetBearing(dirPoint, distance * 0.15, winDirStart), {


            icon: icon2,


            offset: new BMap.Size(0, -20)


        });


        var marker2 = new BMap.Marker(EOffsetBearing(dirPoint, distance * 0.31, winDirEnd), {


            icon: icon2,


            offset: new BMap.Size(0, -20)


        });


        var marker3 = new BMap.Marker(EOffsetBearing(dirPoint, distance * 0.61, winDirStart), {


            icon: icon1,


            offset: new BMap.Size(0, -20)


        });


        var marker4 = new BMap.Marker(EOffsetBearing(dirPoint, distance * 0.78, winDirEnd), {


            icon: icon1,


            offset: new BMap.Size(0, -20)


        });


        map.addOverlay(marker1);


        map.addOverlay(marker2);


        map.addOverlay(marker3);


        map.addOverlay(marker4);


    }




    $("#show").one('click', function () {


        setTimeout(function () {


            if ($.isEmptyObject(dirPoint) || $.isEmptyObject(getPollutionSourceData) || typeof (getPollutionSourceData["e6"]) == "undefined" || typeof (getPollutionSourceData["e7"]) == "undefined" || typeof (getPollutionSourceData["e18"]) == "undefined" || typeof (getPollutionSourceData["e23"]) == "undefined" || getPollutionSourceData["e18"] <= 0.03) {


            if ($.isEmptyObject(dirPoint) || $.isEmptyObject(getPollutionSourceData) || typeof (getPollutionSourceData["e18"]) == "undefined" || typeof (getPollutionSourceData["e23"]) == "undefined" || getPollutionSourceData["e18"] === 0) {


                showNoData();


            } else {


                var humidity = parseFloat(getPollutionSourceData["e6"]);


                var temperature = parseFloat(getPollutionSourceData["e7"]);


                if (typeof (getPollutionSourceData["e6"]) != "undefined") {


                    humidity = parseFloat(getPollutionSourceData["e6"]);


                }


                if (typeof (getPollutionSourceData["e7"]) != "undefined") {


                    temperature = parseFloat(getPollutionSourceData["e7"]);


                }


                var windSpeed = parseFloat(getPollutionSourceData["e18"]);


                var windDir = parseFloat(getPollutionSourceData["e23"]);


                var iconDir = new BMap.Icon("/img/ico07.gif", new BMap.Size(50, 50));


                var markerDir = new BMap.Marker(dirPoint, {icon: iconDir, offset: new BMap.Size(0, -20)});






                //centre:椭圆中心点,X:横向经度,Y:纵向纬度


                function add_oval(centre, x, y) {


                    var assemble = new Array();


                    var angle;


                    var dot;


                    var tangent = x / y;


                    for (i = 0; i < 36; i++) {


                        angle = (2 * Math.PI / 36) * i;


                        dot = new BMap.Point(centre.lng + Math.sin(angle) * y * tangent, centre.lat + Math.cos(angle) * y);


                        assemble.push(dot);


                    }


                    return assemble;


                }




                //以画多边形区域的方法画扇形区域 画出以point点为圆心，半径为radius，夹角从sDegree到eDegree的扇形


                function Sector(point, radius, sDegree, eDegree) {


                    var points = []; //创建构成多边形的点数组


                    var step = ((eDegree - sDegree) / 100) || 1; //根据扇形的总夹角确定每步夹角度数，最大为10


                    points.push(point);


                    for (var i = sDegree; i < eDegree + 0.001; i += step) { //循环获取每步的圆弧上点的坐标，存入点数组


                        points.push(EOffsetBearing(point, radius, i));


                    }


                    points.push(point);


                    return points;


                }




                //使用数学的方法计算需要画扇形的圆弧上的点坐标


                function EOffsetBearing(point, dist, bearing) {


                    var lngConv = map.getDistance(point, new BMap.Point(point.lng + 0.1, point.lat)) * 10; //计算经度与原点的距离


                    var latConv = map.getDistance(point, new BMap.Point(point.lng, point.lat + 0.1)) * 10; //计算纬度与原点的距离


                    var lat = dist * Math.sin(bearing * Math.PI / 180) / latConv; //正弦计算待获取的点的纬度与原点纬度差


                    var lng = dist * Math.cos(bearing * Math.PI / 180) / lngConv; //余弦计算待获取的点的经度与原点经度差


                    return new BMap.Point(point.lng + lng, point.lat + lat);


                }


                var selectSensorKey = getPollutionSourceData["selectSensorKey"];


                var markerDir = new BMap.Marker(dirPoint);


                lab = new BMap.Label("经过溯源运算，确认该点为污染源</br>" + selectSensorKey + "超标", {


                    position: dirPoint,


                    offset: new BMap.Size(20, -40)


                });


                lab.setStyle({


                    color: "#EE3B3B",


                    fontSize: "16px",


                    backgroundColor: "1",


                    fontWeight: "bold"


                });


                map.addOverlay(lab);




                var distance = windSpeed * 3600;


                var winDirStart = 240 - windDir;


                var winDirEnd = 300 - windDir;


                var winDirStartLeft = 240 - windDir;


                var winDirEndLeft = 250 - windDir;


                var winDirStartMiddle = 250 - windDir;


                var winDirEndMiddle = 290 - windDir;


                var winDirStartRight = 290 - windDir;


                var winDirEndRight = 300 - windDir;


                var winDirStart = 255 - windDir;


                var winDirEnd = 285 - windDir;


                var polyline1 = new BMap.Polyline([


                        dirPoint,


                        EOffsetBearing(dirPoint, distance, winDirStart)


                    ],


                    {strokeColor: "red", strokeWeight: 4, strokeOpacity: 1}


                );


                var polyline2 = new BMap.Polyline([


                        dirPoint,


                        EOffsetBearing(dirPoint, distance, winDirEnd)


                    ],


                    {strokeColor: "red", strokeWeight: 4, strokeOpacity: 1}


                );


                map.addOverlay(polyline1);// 画两点间线


                map.addOverlay(polyline2);// 画两点间线


                map.addOverlay(markerDir);


                setTimeout(function () {


                    var oval = new BMap.Polygon(Sector(dirPoint, distance, winDirStart, winDirEnd), {


                        strokeColor: "grey",


                        strokeWeight: 1,


                        strokeOpacity: 0.8,


                        fillColor: "grey"


                    var ovalLeft = new BMap.Polygon(Sector(dirPoint, distance, winDirStartLeft, winDirEndLeft), {


                        strokeColor: "#ADADAD",


                        strokeWeight: 0.1,


                        strokeOpacity: 0.7,


                        fillColor: "#ADADAD"


                    });


                    map.addOverlay(ovalLeft);


                    var oval = new BMap.Polygon(Sector(dirPoint, distance, winDirStartMiddle, winDirEndMiddle), {


                        strokeColor: "#A6A6A6",


                        strokeWeight: 0.1,


                        strokeOpacity: 0.95,


                        fillColor: "#A6A6A6"


                    });


                    map.addOverlay(oval);


                    var ovalRight = new BMap.Polygon(Sector(dirPoint, distance, winDirStartRight, winDirEndRight), {


                        strokeColor: "#ADADAD",


                        strokeWeight: 0.1,


                        strokeOpacity: 0.7,


                        fillColor: "#ADADAD"


                    });


                    map.addOverlay(ovalRight);


                }, 1500);


                setTimeout(function () {


                    var oval = new BMap.Polygon(Sector(dirPoint, distance * 0.66, winDirStart, winDirEnd), {


                        strokeColor: "grey",


                        strokeWeight: 1,


                        strokeOpacity: 0.6,


                        fillColor: "grey"


                    var ovalLeft = new BMap.Polygon(Sector(dirPoint, distance * 0.66, winDirStartLeft, winDirEndLeft), {


                        strokeColor: "#ADADAD",


                        strokeWeight: 0.1,


                        strokeOpacity: 0.5,


                        fillColor: "#ADADAD"


                    });


                    map.addOverlay(ovalLeft);


                    var oval = new BMap.Polygon(Sector(dirPoint, distance * 0.66, winDirStartMiddle, winDirEndMiddle), {


                        strokeColor: "#A6A6A6",


                        strokeWeight: 0.1,


                        strokeOpacity: 0.75,


                        fillColor: "#A6A6A6"


                    });


                    map.addOverlay(oval);


                    var ovalRight = new BMap.Polygon(Sector(dirPoint, distance * 0.66, winDirStartRight, winDirEndRight), {


                        strokeColor: "#ADADAD",


                        strokeWeight: 0.1,


                        strokeOpacity: 0.7,


                        fillColor: "#ADADAD"


                    });


                    map.addOverlay(ovalRight);


                    var polyline = new BMap.Polyline([


                            dirPoint,


                            point


@@ -239,60 +297,77 @@


                    addArrow(polyline, 0, Math.PI / 7, temperature, humidity, windSpeed, windDir);


                }, 1000);


                setTimeout(function () {


                    var oval = new BMap.Polygon(Sector(dirPoint, distance * 0.33, winDirStart, winDirEnd), {


                        strokeColor: "grey",


                        strokeWeight: 1,


                        strokeOpacity: 0.4,


                        fillColor: "grey"


                    var ovalLeft = new BMap.Polygon(Sector(dirPoint, distance * 0.33, winDirStartLeft, winDirEndLeft), {


                        strokeColor: "#ADADAD",


                        strokeWeight: 0.1,


                        strokeOpacity: 0.3,


                        fillColor: "#ADADAD"


                    });


                    map.addOverlay(markerDir);


                    map.addOverlay(ovalLeft);


                    var oval = new BMap.Polygon(Sector(dirPoint, distance * 0.33, winDirStartMiddle, winDirEndMiddle), {


                        strokeColor: "#A6A6A6",


                        strokeWeight: 0.1,


                        strokeOpacity: 0.55,


                        fillColor: "#A6A6A6"


                    });


                    var ovalRight = new BMap.Polygon(Sector(dirPoint, distance * 0.33, winDirStartRight, winDirEndRight), {


                        strokeColor: "#ADADAD",


                        strokeWeight: 0.1,


                        strokeOpacity: 0.7,


                        fillColor: "#ADADAD"


                    });


                    map.addOverlay(ovalRight);


                    map.addOverlay(oval);


                }, 500);






                var winfowTextCause = "<p style='height: 44px;line-height: 22px'>汽车尾气，工厂废气，以及周边地区农田秸秆焚烧，污染传播途径是根据风向来做出调整</p>";


                var winfowTextCause = "<p style='height: 22px;line-height: 22px'>汽车尾气，工厂废气，以及周边地区农田秸秆焚烧</p>";


                var winfowTextSource;


                var supplement;


                if (month == 12 || month == 1 || month == 2) {


                    if (windSpeed >= 3.4) {


                        supplement = "，但风速较大，大气扩散条件较有利，空气质量相对提升";


                if (selectSensorKey == "臭氧") {


                    winfowTextCause = "<p style='height: 44px;line-height: 22px'>主要来源机动车尾气、燃煤排放氮氧化物，油漆油气挥发有机物在高温，阳光充足的照射下发生光化学烟雾</p>";


                    winfowTextSource = "<p style='height: 22px;line-height: 22px'>NOx以及VOCs总量超标</p>";


                } else {


                    if (month == 12 || month == 1 || month == 2) {


                        if (windSpeed >= 3.4) {


                            supplement = "，但风速较大，大气扩散条件较有利，空气质量相对提升";


                        }


                        if (humidity >= 90.0) {


                            supplement = "，但降雨有利于对颗粒物的沉降、冲刷，改善污染状况";


                        } else {


                            supplement = "";


                        }


                        winfowTextSource = "<p style='height: 22px;line-height: 22px'>压强升高气温降低，会因冷空气带来的颗粒物，导致污染上升" + supplement + "</p>";


                    } else if (month == 3 || month == 4 || month == 5) {


                        if (windSpeed >= 3.4) {


                            supplement = "，但风速较大，大气扩散条件较有利，空气质量相对提升";


                        }


                        if (humidity >= 90.0) {


                            supplement = "，但降雨有利于对颗粒物的沉降、冲刷，改善污染状况";


                        } else {


                            supplement = "";


                        }


                        winfowTextSource = "<p style='height: 22px;line-height: 22px'>地面逆温频率的增加使污染物在近地层不断积累" + supplement + "</p>";


                    } else if (month == 6 || month == 7) {


                        if (windSpeed >= 3.4) {


                            supplement = "，同时风速较大，加速扩散";


                        }


                        if (humidity >= 90.0) {


                            supplement = "，同时降雨有利于对颗粒物的沉降、冲刷，改善污染状况";


                        } else {


                            supplement = "";


                        }


                        winfowTextSource = "<p style='height: 22px;line-height: 22px'>夏季的气温条件不易发生逆温,利于污染物扩散" + supplement + "</p>";


                    } else if (month == 8 || month == 9 || month == 10 || month == 11) {


                        if (windSpeed >= 3.4) {


                            supplement = "，但风速较大，利于污染物扩散";


                        }


                        if (humidity >= 90.0) {


                            supplement = "，但降雨有利于对颗粒物的沉降、冲刷，改善污染状况";


                        } else {


                            supplement = "";


                        }


                        winfowTextSource = "<p style='height: 22px;line-height: 22px'>大气扩散条件不好使污染物聚集，增大了气态污染物向二次颗粒物转化的机会" + supplement + "</p>";


                    }


                    if (humidity >= 90.0) {


                        supplement = "，但降雨有利于对颗粒物的沉降、冲刷，改善污染状况";


                    } else {


                        supplement = "";


                    }


                    winfowTextSource = "<p style='height: 22px;line-height: 22px'>压强升高气温降低，会因冷空气带来的颗粒物，导致污染上升" + supplement + "</p>";


                } else if (month == 3 || month == 4 || month == 5) {


                    if (windSpeed >= 3.4) {


                        supplement = "，但风速较大，大气扩散条件较有利，空气质量相对提升";


                    }


                    if (humidity >= 90.0) {


                        supplement = "，但降雨有利于对颗粒物的沉降、冲刷，改善污染状况";


                    } else {


                        supplement = "";


                    }


                    winfowTextSource = "<p style='height: 22px;line-height: 22px'>地面逆温频率的增加使污染物在近地层不断积累" + supplement + "</p>";


                } else if (month == 6 || month == 7) {


                    if (windSpeed >= 3.4) {


                        supplement = "，同时风速较大，加速扩散";


                    }


                    if (humidity >= 90.0) {


                        supplement = "，同时降雨有利于对颗粒物的沉降、冲刷，改善污染状况";


                    } else {


                        supplement = "";


                    }


                    winfowTextSource = "<p style='height: 22px;line-height: 22px'>夏季的气温条件不易发生逆温,利于污染物扩散" + supplement + "</p>";


                } else if (month == 8 || month == 9 || month == 10 || month == 11) {


                    if (windSpeed >= 3.4) {


                        supplement = "，但风速较大，利于污染物扩散";


                    }


                    if (humidity >= 90.0) {


                        supplement = "，但降雨有利于对颗粒物的沉降、冲刷，改善污染状况";


                    } else {


                        supplement = "";


                    }


                    winfowTextSource = "<p style='height: 22px;line-height: 22px'>大气扩散条件不好使污染物聚集，增大了气态污染物向二次颗粒物转化的机会" + supplement + "</p>";


                }




                var winfowText = '<div style="height:150px;" >';


@@ -311,86 +386,158 @@


                    this.openInfoWindow(infoWindow);


                });


            }




            function addArrow(polyline, length, angleValue, temperature, humidity, windSpeed, windDir) {


                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;// 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);


                        pixelY = 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;


                    }


                    var pointMiddle = map.pixelToPoint(new BMap.Pixel(poMiddleX, poMiddleY));


                    var windDirection;


                    if (windDir == 0) {


                        windDirection = "北风";


                    } else if (windDir == 90) {


                        windDirection = "东风";


                    } else if (windDir == 180) {


                        windDirection = "南风";


                    } else if (windDir == 270) {


                        windDirection = "西风";


                    } else if (windDir > 0 && windDir < 90) {


                        windDirection = "东北风";


                    } else if (windDir > 90 && windDir < 180) {


                        windDirection = "东南风";


                    } else if (windDir > 180 && windDir < 270) {


                        windDirection = "西南风";


                    } else if (windDir > 270 && windDir < 360) {


                        windDirection = "西北风";


                    }


                    lab = new BMap.Label("<P>温度:" + temperature + "℃</p><P>湿度:" + humidity + "%</p><P>风速:" + windSpeed + "m/s</p><P>风向:" + windDirection + "</p>", {


                        position: pointMiddle,


                        offset: new BMap.Size(-50, -40)


                    });


                    lab.setStyle({


                        color: "#EE3B3B",


                        fontSize: "16px",


                        backgroundColor: "1",


                        border: "0",


                        fontWeight: "bold"


                    });


                    map.addOverlay(lab);


                }


            };




            function showNoData() {


                map.centerAndZoom(point, 17);


                setTimeout(function () {


                    document.getElementById("cpm").style.display = 'block';


                }, 250);


            };


        }, 1500);


    });




    //centre:椭圆中心点,X:横向经度,Y:纵向纬度


    function add_oval(centre, x, y) {


        var assemble = new Array();


        var angle;


        var dot;


        var tangent = x / y;


        for (i = 0; i < 36; i++) {


            angle = (2 * Math.PI / 36) * i;


            dot = new BMap.Point(centre.lng + Math.sin(angle) * y * tangent, centre.lat + Math.cos(angle) * y);


            assemble.push(dot);


        }


        return assemble;


    }




    //以画多边形区域的方法画扇形区域 画出以point点为圆心，半径为radius，夹角从sDegree到eDegree的扇形


    function Sector(point, radius, sDegree, eDegree) {


        var points = []; //创建构成多边形的点数组


        var step = ((eDegree - sDegree) / 100) || 1; //根据扇形的总夹角确定每步夹角度数，最大为10


        points.push(point);


        for (var i = sDegree; i < eDegree + 0.001; i += step) { //循环获取每步的圆弧上点的坐标，存入点数组


            points.push(EOffsetBearing(point, radius, i));


        }


        points.push(point);


        return points;


    }




    //使用数学的方法计算需要画扇形的圆弧上的点坐标


    function EOffsetBearing(point, dist, bearing) {


        var lngConv = map.getDistance(point, new BMap.Point(point.lng + 0.1, point.lat)) * 10; //计算经度与原点的距离


        var latConv = map.getDistance(point, new BMap.Point(point.lng, point.lat + 0.1)) * 10; //计算纬度与原点的距离


        var lat = dist * Math.sin(bearing * Math.PI / 180) / latConv; //正弦计算待获取的点的纬度与原点纬度差


        var lng = dist * Math.cos(bearing * Math.PI / 180) / lngConv; //余弦计算待获取的点的经度与原点经度差


        return new BMap.Point(point.lng + lng, point.lat + lat);


    }




    function addArrow(polyline, length, angleValue, temperature, humidity, windSpeed, windDir) {


        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;// 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);


                pixelY = 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;


            }


            var pointMiddle = map.pixelToPoint(new BMap.Pixel(poMiddleX, poMiddleY));


            var windDirection;


            if (windDir == 0) {


                windDirection = "北风";


            } else if (windDir == 90) {


                windDirection = "东风";


            } else if (windDir == 180) {


                windDirection = "南风";


            } else if (windDir == 270) {


                windDirection = "西风";


            } else if (windDir > 0 && windDir < 90) {


                windDirection = "东北风";


            } else if (windDir > 90 && windDir < 180) {


                windDirection = "东南风";


            } else if (windDir > 180 && windDir < 270) {


                windDirection = "西南风";


            } else if (windDir > 270 && windDir < 360) {


                windDirection = "西北风";


            }


            if (temperature != 0 && humidity != 0) {


                lab = new BMap.Label("<P>温度:" + temperature + "℃</p><P>湿度:" + humidity + "%</p><P>风速:" + windSpeed + "m/s</p><P>风向:" + windDirection + "</p>", {


                    position: pointMiddle,


                    offset: new BMap.Size(-50, -40)


                });


            } else if (temperature == 0 && humidity != 0) {


                lab = new BMap.Label("<P>湿度:" + humidity + "%</p><P>风速:" + windSpeed + "m/s</p><P>风向:" + windDirection + "</p>", {


                    position: pointMiddle,


                    offset: new BMap.Size(-50, -40)


                });


            } else if (temperature != 0 && humidity == 0) {


                lab = new BMap.Label("<P>温度:" + temperature + "℃</p><P>风速:" + windSpeed + "m/s</p><P>风向:" + windDirection + "</p>", {


                    position: pointMiddle,


                    offset: new BMap.Size(-50, -40)


                });


            } else {


                lab = new BMap.Label("<P>风速:" + windSpeed + "m/s</p><P>风向:" + windDirection + "</p>", {


                    position: pointMiddle,


                    offset: new BMap.Size(-50, -40)


                });


            }


            lab.setStyle({


                color: "#EE3B3B",


                fontSize: "16px",


                backgroundColor: "1",


                border: "0",


                fontWeight: "bold"


            });


            map.addOverlay(lab);


        }


    };




    function showNoData() {


        map.centerAndZoom(point, 17);


        setTimeout(function () {


            if (JSON.stringify(getPollutionSourceData) == JSON.stringify({})) {


                document.getElementById("cpm").innerText = "该时间点查询无数据";


            } else {


                if (getPollutionSourceData["e18"] === 0) {


                    document.getElementById("cpm").style.width = '380px';


                    document.getElementById("cpm").innerText = "风速为0，无法溯源运算";


                }


                if (typeof (getPollutionSourceData["e18"]) == "undefined") {


                    document.getElementById("cpm").style.width = '400px';


                    document.getElementById("cpm").innerText = "设备无风速，无法溯源运算";


                }


                if (typeof (getPollutionSourceData["e23"]) == "undefined") {


                    document.getElementById("cpm").style.width = '400px';


                    document.getElementById("cpm").innerText = "设备无风向，无法溯源运算";


                }


                if (typeof (getPollutionSourceData["e18"]) == "undefined" && typeof (getPollutionSourceData["e23"]) == "undefined") {


                    document.getElementById("cpm").style.width = '500px';


                    document.getElementById("cpm").innerText = "设备无风速，无风向，无法溯源运算";


                }


            }


            document.getElementById("cpm").style.display = 'block';


        }, 250);


    };




</script>