Gridding is the process of transforming randomly spaced data into an evenly spaced grid, also known as a raster. By feeding raw data into a gridding algorithm, you can transform field data of any kind. Pressure readings from monitor wells, chemical concentrations, subsurface contamination, temperature, electrical resistivity, or elevation. Any variable you can associate to location data in a XYZ or XYZC format can be gridded.
You should strive for software with simple to use, but mathematically sound gridding functions like Surfer. Surfer can import the field data you worked hard to collect, and transform it into a grid you can generate maps from in seconds.