I am currently preparing 2-D hydro-dynamics modelling software and would like the software to display the results graphically. I have made some attempts to develop this code but could not go beyond scattered diagram, with out a link joining values of equal magnitude as is obtained in contours. The data could be imported from a data base and comprises the coordinates easting and northings and the values of velocity or elevations. Samples of the input data and the results of my code is hereby attached.