Hi Korbie, I'm not sure exactly what map you are referring to, but if you can give me the direct link to where you downloaded the map, I can tell you what the red dots are. I assume these are station locations indicating where we sampled and described the ashfall. There are a few versions of this map. The digital GIS files and metadata can be found here: http://www.dggs.alaska.gov/pubs/id/23463 A page-size figure of the map can be found in this report: http://www.dggs.alaska.gov/pubs/id/23123 -Janet -------- Korbie Vaden wrote: Hi, I'm a college student doing a study on the effects of the Redoubt Volcano. I downloaded a file of an Ash Fall Contour Map for the volcano, and there are red dots everywhere on the map. Are these sample sites for where the ash was, or are they something else? Thanks, Korbie Vaden