Version history for Collins, Brian D., and Kayen, Robert, 2006, Land-based lidar mapping; a new surveying technique to shed light on rapid topographic change: U.S. Geological Survey Fact Sheet 2006-3111 [available on the World Wide Web at http://pubs.usgs.gov/fs/2006/3111/ ]. Version 1.0, December 12, 2006 Initial release online at http://pubs.usgs.gov/fs/2006/3111/