Make a contour map

[PhucHoang]

Hi everybody
i am an hydrogeological engineering.
now, i have to make a contour map about groundwater level!
how can i do in arcgis.
please help me
many thanks

[raja]

If you know your groundwater elevations, you can make a point feature class, create a TIN surface from it based on elevation, and then use Spatial or 3d analyst to create contours.

[PhucHoang]

Thanks a lot!