Regional LLWW Keys for the Western U.S. Completed

GeoSpatial Services is pleased to announce the publication of a set of regionalized keys to LLWW for inland wetlands of the Western U.S. LLWW is a wetland classification system based on Landscape Position, Landform, Water Flow Path, and Waterbody Type. This document represents more than a year of collaborative work by GSS and the Colorado Natural Heritage Program, with input from the Utah Geologic Survey. The project partners spent countless hours on the phone and in a shared Google document attempting to craft LLWW keys that could be applied consistently for most common situations in the Western U.S. These keys are based on the principles of Ralph Tiner’s most recent (2014) LLWW Keys, but simplify and clarify potentially confusing codes and add greater detail on the coding of common western wetland types. Next, the collaborators will be working to build an image library of air photos of wetlands mapped with NWI and this LLWW attribution. The new keys can be found at this link: https://cnhp.colostate.edu/download/documents/cwic_docs/LLWW%20Key%20for%20Inland%20Western%20US_vDec10_2018.pdf

An illustrated example of LLWW codes and modifiers for common situations in the western U.S.