Tetra Tech INCA 
Services Civil and Survey, Transportation and Transit Survey and Mapping GPS Control Surveying
Services Civil and Survey, Transportation and Transit Survey and Mapping GPS Control Surveying
GPS Control Surveying
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Global Positioning Systems (GPS) are routinely used to provide control for survey projects. INCA’s survey staff have used GPS since its infancy, gaining invaluable experience in planning, data processing, and geodesy, which is essential to getting practical and reliable results. INCA utilizes LEICA® 1200 Smart Rovers. INCA’s survey technicians established a network of over 50 GPS control points for Sound Transit’s High Capacity East Link project (17 miles). They have provided the survey control for numerous state highway and local agency projects.