Circles with particular radius for latitude and longitude points plotted on map

I have few points with latitude and longitude on the map.

This is what I have now (see image below) and I am interested in creating circles with particular radius, how can I do that?

Answer 1

[KSSV]

R = 1. ;    % radius of circle 
C = rand(2,1) ;   % center of circle 
th = linspace(0,2*pi) ;
x  = C(1)+R*cos(th) ; 
y = C(2)+R*sin(th) ;

plot(x,y) ;

[Simran Sandhu]

center of the circle would be the lat and long that I plotted?

[KSSV]

I have taken some random center....you take center as your (lon, lat).

[Simran Sandhu]

Thank you so much, will give it a try this way.. :)

[Simran Sandhu]

R = 1 ; % radius of circle C = rand(21.1658 72.7939); % center of circle th = linspace(0,2*pi) ; x = C(1)+R*cos(th) ; y = C(2)+R*sin(th) ; plot(x,y)

Error: Error: File: boston.m Line: 2 Column: 18 Unexpected MATLAB expression.

[Simran Sandhu]

Error is in this syntax:

C = rand(21.1658 72.7939); % center of circle

[KSSV]

C = [21.1658 72.7939]; % center of circle

[Simran Sandhu]

Thank you so much for correcting my silly mistakes.. :)

[hanif hamden]

MathWorks

Does the radius represent unitin km?

[Devendra Pandey]

Hi KSSV,

What is rand and linspace in this code?

Kindly reply

[KSSV]

rand generates random numbers. I wanted to choose center of circle, so I select a random point as center. Linspace generates values between givenn intervels with specified size. You can read them from MATLAB rich documentation.