--通过经纬度计算两点之间的距离 create FUNCTION [dbo].[fnGetDistanceNew] --LatBegin 开始经度 --LngBegin 开始维度 --29.490295,106.486654,29.615467, 106.581515 (), ),)) Returns real AS BEGIN --转换location字段,防止字段太长.影响SQL美观 declare @LatBegin REAL declare @LngBegin REAL declare
最近用到了根据经纬度计算地球表面两点间距离的公式,然后就用JS实现了一下. 计算地球表面两点间的距离大概有两种办法. 第一种是默认地球是一个光滑的球面,然后计算任意两点间的距离,这个距离叫做大圆距离(The Great Circle Distance). 公式如下: 使用JS来实现为: var EARTH_RADIUS = 6378137.0; //单位M var PI = Math.PI; function getRad(d){ re
在Android google map中,有时候会碰到计算两地的距离,下面的辅助类就可以帮助你计算距离: public class DistanceHelper { /** Names for the units to use */ public final static int KILOMETERS = 0; public final static int STATUTE_MILES = 1; public final static int NAUTICAL_MILES = 2; /** Ra
package xxx.driver.business.utils; /** * <p>Represents a point on the surface of a sphere. (The Earth is almost * spherical.)</p> * * <p>To create an instance, call one of the static methods fromDegrees() or * fromRadians().</p> *
mysql函数: SET FOREIGN_KEY_CHECKS=0; DROP FUNCTION IF EXISTS `getDistance`;DELIMITER ;;CREATE DEFINER=`root`@`%` FUNCTION `getDistance`(`lng1` decimal,`lat1` decimal,`lng2` decimal,`lat2` decimal) RETURNS decimal(18,2)BEGIN RETURN round(6378.138*2*asin
Journey Time Limit: 15000/3000MS (Java/Others) Memory Limit: 65535/65535KB (Java/Others) Bob has traveled to byteland, he find the N cities in byteland formed a tree structure, a tree structure is very special structure, there is exactly one path
How far away ? Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 10412 Accepted Submission(s): 3777 Problem Description There are n houses in the village and some bidirectional roads connecting