I would like to plot a vector field in Lagrangian coordinates using Ferret. I have somewhat of an idea how it could be done by re-gridding at each time step, but was wondering if there are already GO files written to help with the process? Thanks! Lynn deWitt ldewitt@pfeg.noaa.gov Pacific Fisheries Environmental Laboratories 1352 Lighthouse Avenue Pacific Grove, CA 93950-2097 (408)-648-0610