how can I get the distance between two points in geoscatter

Hello, so I got a variable of latitud and another of longitud and a latitud and langitud from a point in the map. What I want is to calculate the distance between each point of the variables to the point I got in geoscatter. How can I do it?

Answer 1

[Divit]

Hi,

I understand that you would like to calculate distance between a reference point and a list of points in “geoscatter”.

Here’s sample MATLAB code to help you with the task:

% Define latitude and longitude arrays for your points 
lat_array = [latitude1, latitude2, latitude3, ...]; % Replace with your values 
lon_array = [longitude1, longitude2, longitude3, ...]; % Replace with your values 

% Define the latitude and longitude of your reference point 
ref_lat = reference_latitude; % Replace with your value 
ref_lon = reference_longitude; % Replace with your value 

% Convert latitude and longitude values to radians 
lat_array_rad = deg2rad(lat_array); 
lon_array_rad = deg2rad(lon_array); 
ref_lat_rad = deg2rad(ref_lat); 
ref_lon_rad = deg2rad(ref_lon); 

% Radius of the Earth in kilometers (mean value) 
earth_radius_km = 6371; 

% Initialize an array to store distances 
distances_km = zeros(size(lat_array)); 

% Calculate distances using the Haversine formula 
for i = 1:length(lat_array) 
    dlat = lat_array_rad(i) - ref_lat_rad; 
    dlon = lon_array_rad(i) - ref_lon_rad; 
    
    a = sin(dlat/2)^2 + cos(ref_lat_rad) * cos(lat_array_rad(i)) * sin(dlon/2)^2; 
    c = 2 * atan2(sqrt(a), sqrt(1-a)); 
    
    distances_km(i) = earth_radius_km * c; 
end 

The “distances_km” array contains the distances between the reference point and each point in your “lat_array” and “lon_array”.

To understand more, refer to the following documentation links: 

• deg2rad: https://www.mathworks.com/help/matlab/ref/deg2rad.html
• atan2: https://www.mathworks.com/help/matlab/ref/atan2.html
• geoscatter: https://www.mathworks.com/help/matlab/ref/geoscatter.html

I hope you find it useful.