Our survey team developed and updated a GPS/GNSS Control Network along 88 miles of I-20 through Van Zandt, Smith, Gregg, and Harrison Counties, for the Texas Department of Transportation (TxDOT) Tyler District. We recovered and verified 37 existing TxDOT Primary Control Monuments (PCP) and set 15 additional PCP & 267 Secondary Control Points (SCP).

Some of the SCP were used as either Aerial LiDAR and Orthophotographic Ground Control - Aerial Targets (AT) - for our sub-provider or Survey Control for Terrestrial High-Definition LiDAR Scanning. We provided TxDOT with Control Datasheets, and Layout map, georeferenced Orthophotos and a Microstation model of a 1,400-foot corridor of I-20, including 47 bridge details modeled from Terrestrial Scanning.

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Services Provided:

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• Aerial and Terrestrial LiDAR Scanning

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