UNSPSC 41114216: Alidade

A type of device that is designed to test the direction of the sideline during the flat-table surveying. It is the device to fill in on the drawing paper by setting forth the line of collimation direction that is sometimes used to measure the height difference or distance of two points.

UNSPSC 41114216 Alidade, a Commodity code, covers surveying instruments and equipment used by state and local governments for boundary surveys, topographic analysis, elevation assessments, and site characterization in transportation, environmental, and land-management contexts. Recent state and local solicitations show two distinct procurement patterns under this code: direct purchase or maintenance of surveying hardware (GPS, total stations, and network-based equipment), and professional surveying services delivered by licensed practitioners using such instruments. Monroe County, Florida and the Illinois Department of Transportation emerge as repeat buyers, with IDOT securing maintenance and software integration for its statewide Continuous Operating Reference Station network and Monroe County retaining multiple qualified surveying firms on task-order contracts. Work solicited ranges from small-project boundary surveys and right-of-way determinations capped at $250,000 per engagement to large-scale networked CORS infrastructure maintenance and software licensing supporting transportation planning across a state's nine districts.

Florida and Illinois dominate recent activity under this code. Monroe County, Florida posted an RFQ (RFQ649) on September 24, 2026, due October 27, 2026, for professional surveying continuing services under four-year task-order contracts with at least three awardees; scope includes boundary surveys, topographic analysis, elevation certificates, and metes-and-bounds interpretation, with individual projects capped at $250,000 in construction cost or $25,000 in professional fees. The Illinois Department of Transportation posted two sole-source notices in 2026: a May 21 change order for Trimble Survey-GPS equipment maintenance and repair valued at $1,497,317.87 (FY 2027), and a September 9 notice for Pivot and CORS software supporting the statewide Trimble Network valued at $1.23 million. Both IDOT procurements were awarded to incumbent Seiler Instrument as Trimble's exclusive authorized dealer and service center across the Midwest. The CORS network expansion reflects ongoing infrastructure investment; the equipment-maintenance and software-licensing pattern signals that state-level infrastructure operators view alidade equipment (survey-grade GPS and networked reference stations) as critical sustained-operations assets rather than one-time capital purchases.