Surfer 11 is designed to accurately transform data into presentation-ready maps. The package offers 12 different gridding methods, including Kriging with variograms, to convert irregularly spaced XYZ data into a uniform grid. Users can display a grid or digital elevation model in one of eight fully customizable 2-D and 3-D map types: contour, watershed, image, shaded relief, 1-grid and 2-grid vector, 3-D wireframe, and 3-D surface maps. The display can be enhanced by adding post, classed post and base maps. Users can load a grid file to create a watershed map and display catchment basins and stream lines based on the Z data in the grid file. In addition to creating watershed maps, users can load and label base maps with attributes.