grading, drainage, and construction stakeout, and delivers CAD and PDF files for use in the field and submittals that do not require a licensed surveyor. Terratek GPS Modeling also performs earthwork takeoffs, including cut and fill analysis, material quantities, and production-related calculations to support estimating and bidding. In addition, it provides production analysis services to track volumes and areas for as-builts and payment. The company offers GPS model building training to help contractors develop in-house modeling and stakeout capabilities.