Photogrammetric Services

Photogrammetric Services

State of Missouri
Missouri Department of Transportation


The Missouri Department of Transportation (MoDOT) selected Midland Surveying, Inc. based on qualifications to provide survey ground control and aerial collection of digital imagery and LiDAR data for ten (10) project sites covering ninety (90) corridor miles in 2013 throughout the State of Missouri. Site locations included areas near that cities of: Kansas City (1), Columbia (1), Joplin (1), and St. Louis (7). The overall project had an aggressive completion date of 120 days from notice to proceed.


Midland Surveying, Inc. was responsible for all survey ground control features relevant to this project. Preliminary site reconnaissance was completed to determine what existing National Geodetic Survey (NGS) stations were available for GPS observation.  Project control monuments (5/8” iron bar with aluminum caps) were then set and tied out for future recovery by MoDOT personnel. Control Monument ties were compiled in a bound field book and included the following information: field sketch, direction and distance to recovery ties, and a navigational description from nearest intersection.

Two (2) project control monuments were established per project mile.  Two and one-half (2 ½) OPUS observations were completed on all NGS and project control monuments established by Midland Surveying to verify accuracy to the MoDOT Virtual Reference Station (VRS) network and NGS datasheets. Data was post-processed using Spectrum Survey.

Survey ground control was referenced horizontally to NAD83 (Appropriate State Plane Zone) and vertically to NAVD88, Geoid09. Control was delivered in State Plane Coordinates, Project Coordinates, and Geodetic Coordinates in an Excel and ASCII format. Glasper Professional Services of St. Louis, MO provided ground survey support, and Merrick and Company of Greenwood Village, Colorado provided aerial support for the project.

This contract was the second consecutive contract awarded to Midland Surveying, Inc. for similar services in different locations throughout Missouri. In 2012, Midland Surveying completed nine (9) project sites covering forty-five (45) corridor miles.

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