Revision History for USGS Scientific Investigations Map 3086 Terrestrial Ecosystems-Topographic Moisture Potential of the Conterminous United States By Jill J. Cress, Roger Sayre, Patrick Comer, and Harumi Warner -------------------------- First Posted August 4, 2009 -------------------------- Revised September 14, 2009 A minor change was made to the lat/long grids.