20241220 18002600 1.0 TRUE Contours This mapping geodatabase database contains the delineation of topographic contours at two foot intervals. It contains both intermediate and index contour lines derived from the hydro-enforced LiDAR DEM Points collected during the Boone County Spring 2015 project. The Columbia Metro Area contour download file is approximately 381 megabytes. City of Columbia, Missouri. Contours developed by Surdex Corporation using the Boone County Assessor’s LiDAR.