The government needed to design and construct a border wall near Calexico, California. The Corps of Engineers contracted with VGW Geospatial to provide the field topographic/planimetric surveying and digital terrain model. The area included a two mile segment along the border that included 60 feet north and 10 feet south of the international boundary.

VGW Geospatial field surveyors used existing horizontal and vertical control to establish control points. The control monuments were set in an area out of the proposed construction disturbance area as these points will be utilized in the design, construction, and asbuilt phases. Surveyors obtained topographic and planimetric mapping data on the ground using both RTK/GPS and robotic total stations. Surveyors used a high rod to locate all features on the south side of the international boundary, and the surveying total station remained on the north side of the international boundary. 

VGW Geospatial provided electronic CAD files of the collection in MicroStation along with a Digial Terrain Model (DTM) of the topographic surveys. Random points, breakline points, and planimetric data was provided along with one-foot contours.