71 lines
1.9 KiB
Plaintext
71 lines
1.9 KiB
Plaintext
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//距离计算工具类
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function rad(d) {
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return d * Math.PI / 180.0;
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}
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// 根据经纬度计算距离，参数分别为第一点的纬度，经度；第二点的纬度，经度
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function getDistances(lat1, lng1, lat2, lng2) {
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var radLat1 = rad(lat1);
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var radLat2 = rad(lat2);
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var a = radLat1 - radLat2;
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var b = rad(lng1) - rad(lng2);
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var s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) +
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Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)));
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s = s * 6378.137; // EARTH_RADIUS;
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// 输出为公里
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s = Math.round(s * 10000) / 10000;
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var distance = s;
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var distance_str = "";
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// 按米来统计距离
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// distance_str = (distance * 1000).toFixed(2) + "m";
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distance_str = (distance * 1000).toFixed(2);
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// if (parseInt(distance) >= 1) {
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// // distance_str = distance.toFixed(1) + "km";
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// distance_str = distance.toFixed(2) + "km";
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// } else {
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// // distance_str = distance * 1000 + "m";
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// distance_str = (distance * 1000).toFixed(2) + "m";
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// }
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//s=s.toFixed(4);
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// console.info('距离是', s);
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// console.info('距离是', distance_str);
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// return s;
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//小小修改，这里返回对象
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let objData = {
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distance_km: distance,
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distance_m: parseFloat(distance_str)
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}
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return objData
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}
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// 返回离球机坐标最近的杆塔位置
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function getShortTower(objArr) {
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const maxDataNum = Math.min.apply(null, objArr.map(item => {
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// console.log(item.age)
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return item.distance
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}
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))
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const maxData = objArr.find(item => maxDataNum === item.distance);
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console.log(maxData)
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return maxData;
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}
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// 距离比较
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function compareDistance(max, min, value) {
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console.log(max);
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console.log(min);
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console.log(value);
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if (value && max && min) {
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if (value >= min && value <= max) {
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return true;
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}
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}
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return false;
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}
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