Water Testing 传送门:链接 来源:UPC 9656 题目描述 You just bought a large piece of agricultural land, but you noticed that – according to regulations – you have to test the ground water at specific points on your property once a year. Luckily the description of
获取地球上两经纬度坐标点间的距离,利用[大圆距离公式] A diagram illustrating great-circle distance (drawn in red) between two points on a sphere, P and Q. Two antipodal points, u and v, are also depicted. 谷歌都在用呢, C#实现的代码如下: /// <summary> /// 地球半径 /// </summary> priva
获取view在屏幕上的绝对坐标在调试时候非常有用. 看如下代码 public class AbsolutePosActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(new DrawLineView(this)); } } public class DrawLineView
go --计算地球上两个坐标点(经度,纬度)之间距离sql函数 --作者:lordbaby --整理:www.aspbc.com CREATE FUNCTION [dbo].[fnGetDistance](@LatBegin REAL, @LngBegin REAL, @LatEnd REAL, @LngEnd REAL) RETURNS FLOAT AS BEGIN --距离(千米) DECLARE @Distance REAL DECLARE @EARTH_RADIUS REAL SET @
Arcgis js之web墨卡托(3857)转经纬度坐标(4326) 手动转化方法: function mercatorTolonlat(mercator){ var lonlat={x:0,y:0}; var x = mercator.x/20037508.34*180; var y = mercator.y/20037508.34*180; y= 180/Math.PI*(2*Math.atan(Math.exp(y*Math.PI/180))-Math.PI/2); lonlat.x =
windows命令行的内容怎么复制,右键选择标记,选中内容后再点击鼠标右键就复制了. 安装Node.js后再用npm install命令会出现如下warn:saveError ENOENT: no such file or directory, open 'C:\Users\MBENBEN\package.json'enoent ENOENT: no such file or directory, open 'C:\Users\MBENBEN\packagage.json' 解决方法是在命令行切