1.      Use “WDAFC” to transform data to surfer:

Select “surfer” and click “Open WDA data file to convert” to select the data needs conversion.

2.     Find folder “Converted data” in the current folder and open it. There will be the converted data what can be opened by surfer.

3.     Open the surfer and grid the data, please pay attention to the X,Y,Z coordinate:

 4.     Click the map and choose set a new isopleth map, choose the grid data and open it. 

Click “Contour” and select “Filled contour”, then click “OK”, the figure is completed.