在 ruby/rails 中是否有一种简单的、非数学类的和确定的方法来执行此操作,其中输入是:
1) An Initial Geo-Coordinate
2) A Bearing
3) A Distance in the Bearing's Direction
输出是一个新的地理坐标
我看过 Ruby Geocoder Gem ,但它不会这样做。
谢谢!
最佳答案
在 Google 中首次搜索“距离方位”:Calculate distance, bearing and more between Latitude/Longitude points
JavaScript 代码在 Ruby 中运行良好:
lat1 = 0.9250245 # starting point's latitude (in radians)
lon1 = 0.0174532 # starting point's longitude (in radians)
brng = 1.67551 # bearing (in radians)
d = 124.8 # distance to travel in km
R = 6371.0 # earth's radius in km
lat2 = Math.asin( Math.sin(lat1)*Math.cos(d/R) +
Math.cos(lat1)*Math.sin(d/R)*Math.cos(brng) )
# => 0.9227260710962849
lon2 = lon1 + Math.atan2(Math.sin(brng)*Math.sin(d/R)*Math.cos(lat1),
Math.cos(d/R)-Math.sin(lat1)*Math.sin(lat2))
# => 0.0497295729068199
# NB. Ensure that all values are cast to floats
关于ruby - Rails/ruby 从起点使用给定距离和方位计算新坐标,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12094484/