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@@ -73,6 +73,64 @@ function testPhone(data) {
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const phone_zz = /^1[3-9]\d{9}$/;
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return phone_zz.test(data)
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}
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+/**
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+ * 判断经纬度是否超出中国境内
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+ */
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+function isLocationOutOfChina(latitude, longitude) {
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+ if (longitude < 72.004 || longitude > 137.8347 || latitude < 0.8293 || latitude > 55.8271)
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+ return true;
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+ return false;
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+}
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+
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+function transformLatWithXY(x, y) {
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+ var pi = 3.14159265358979324;
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+ var lat = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x));
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+ lat += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
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+ lat += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0;
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+ lat += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0;
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+ return lat;
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+}
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+
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+function transformLonWithXY(x, y) {
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+ var pi = 3.14159265358979324;
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+ var lon = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x));
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+ lon += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
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+ lon += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0;
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+ lon += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0 * pi)) * 2.0 / 3.0;
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+ return lon;
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+}
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+
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+function isContains(point, p1, p2) {
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+ return (point.latitude >= Math.min(p1.latitude, p2.latitude) && point.latitude <= Math.max(p1.latitude, p2.latitude)) && (point.longitude >= Math.min(p1.longitude, p2.longitude) && point.longitude <= Math.max(p1.longitude, p2.longitude));
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+}
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+
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+/**
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+ * 将WGS-84(国际标准)转为GCJ-02(火星坐标):
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+ */
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+function transformFromWGSToGCJ(latitude, longitude) {
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+ var lat = "";
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+ var lon = "";
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+ var ee = 0.00669342162296594323;
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+ var a = 6378245.0;
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+ var pi = 3.14159265358979324;
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+ if (isLocationOutOfChina(latitude, longitude)) {
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+ lat = latitude;
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+ lon = longitude;
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+ }
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+ else {
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+ var adjustLat = transformLatWithXY(longitude - 105.0, latitude - 35.0);
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+ var adjustLon = transformLonWithXY(longitude - 105.0, latitude - 35.0);
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+ var radLat = latitude / 180.0 * pi;
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+ var magic = Math.sin(radLat);
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+ magic = 1 - ee * magic * magic;
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+ var sqrtMagic = Math.sqrt(magic);
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+ adjustLat = (adjustLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
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+ adjustLon = (adjustLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
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+ latitude = latitude + adjustLat;
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+ longitude = longitude + adjustLon;
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+ }
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+ return { latitude: latitude, longitude: longitude };
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+ }
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module.exports = {
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formatTime: formatTime,
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formatNumber,
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@@ -80,5 +138,6 @@ module.exports = {
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argusToTimestamp,
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formateYM,
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formatetime,
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- testPhone
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+ testPhone,
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+ transformFromWGSToGCJ
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}
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