We have tif data from the lowermississippi group as well as files coming from TerraPop (e.g.http://sead.ncsa.illinois.edu/acr/#dataset?id=tag:medici@uiuc.edu,2009:data_WAoEO31dRenpSxD6hhqRyQ) that currently show only a black square for a preview. This task is to see if there are way(s) we can display a useful preview image. (If not, we'll explore options such as changing input formats, enabling manual preview upload, etc.)