Figure 12. Contours showing subsidence between 1978 and 1995 (1 and 1.5 m), and Addicks depression boundary (Stork and Sneed, 2002), superimposed on a lidar image. The boundary of the subsidence depression is indicated by tics. The locations of the Long Point and Addicks Faults systems are shown, as is Cypress Creek. The lidar image was generated by removing a linear trend from the lidar DEM. The resultant residual image was then hillshaded. The Addicks subsidence depression is not clearly seen in the residual, and the hillshade shows only drainages, streets, and NE-trending fault scarps.