Calculating a radius with longitude and latitude

geospatial, gis, java

Solution

See Great Circle distance

double CoordDistance(double latitude1, double longitude1, double latitude2, double longitude2)
{
    return 6371 * Math.acos(
        Math.sin(latitude1) * Math.sin(latitude2)
        + Math.cos(latitude1) * Math.cos(latitude2) * Math.cos(longitude2 - longitude1));
}

If your latitude and longitude are in degrees convert them to radians.

Problem

I am trying to determine if two locations (each with their own latitude and longitude values) are within a certain distance of each other, a 3 mile radius for example. I have double values to represent the latitude and longitude of each location. ``` //Location 1 Double lattitude1 = 40.7143528; Double longitude1 = -74.0059731; //Location 2 Double lattitude2 = 33.325; Double longitude2 = 44.422000000000025; ``` I am wondering how I would determine if these two locations are within each others radius or not because I am not entirely sure how to do this with this type of value.

Original source

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