how to plot graph with three associated values

Hello, I am beginner to the matlab software,I need to plot single graph with 3 values.consider, lattitude = [12.550,12.423,12.581,12.527]; longitude = [ 77.905,78.015,77.887,77.925]; A = [54,64,141,184]; want to plot 'A' as countour plot as 12.550,77.905 as 54.I had tried with mesh,plot3,scatter functions.but still I could not find the answer,kindly do needful

[KSSV]

What you gave the data looks like bounding box.....to plot more data is needed.