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.
