The GCS: Field module adds Field Based Grade Checking (FBGC) to the GeoSite Manager System. With the GCS: Field module, the operator can stake surface geometry based on randomly or regularly spaced points, and is not restricted to pre-chosen points or lines. The operator can see his visual and coordinate position on screen (with separate cut/fill indicator) anywhere on the site.  GCS: Field has been used to check the grades of shopping centers, landfills, subdivisions, mitigation areas, industrial parks and golf courses. It is especially well suited to projects with atypical cross sections.