Dawson Geophysical Company provides onshore seismic data acquisition services in the United States. The company acquires and processes two dimensional (2D), three dimensional (3D), and multicomponent seismic data for oil and gas companies and independent oil and gas operators, as well as providers of multiclient data libraries. Dawson's 2D method involves the collection of seismic data in a linear fashion thus generating a single plane of subsurface seismic data. The 3D method produces seismic data, which produces images of the earth's subsurface. Geophysicists use computers to interpret 3D seismic data volumes, generate geologic models of the earth's subsurface, and identify subsurface anomalies that are favorable for the accumulation of hydrocarbons. The company also provides additional processing services, such as enhancement of seismic data by improving reflected signal resolution, removing ambient noise, and establishing proper spatial relationships of geological features. As of September 30, 2006, the company operated 12 seismic data acquisition crews in the in the lower 48 states of the United States and a seismic data processing center. Dawson Geophysical was founded in 1952. The company is headquartered in Midland, Texas and has additional offices in Houston, Denver, and Oklahoma City.