This is a sole source contract for TerraSolid software maintenance awarded to Vertical Aspect LLC. The National Ocean Service requires this specific software to manage, visualize, edit, and analyze extremely large shoreline mapping datasets from Lidar. The justification is that TerraSolid is uniquely capable of handling large datasets and applying specific error adjustments, and Vertical Aspect is its only U.S. distributor. The software is fully integrated into a critical coastal mapping workflow, and not purchasing it would halt data quality review and distribution. No location for performance, budget, or non-bid timelines are specified in this description.