High-resolution imagery and DEM's are now available for the Niwot Ridge LTER and Green Lake Valley CZO areas. The twelve orthophoto mosaics span seven decades — from 1938 to 2008 — at 1.0 m to 30 cm resolution. Also available are four DEM's at 30 m to 2 m resolution. This data release will be useful for a variety of environmental research, including time-series analysis of climate-related changes in vegetation, hydrology, geomorphology, etc.  The datasets should also be useful for visualization, mapping, modeling, and other objectives tied to research, science planning, land management, education, and outreach. For more information, see:

• The README file for the data release
• A powerpoint visual overview of the data (21 MB, updated 9/29/09)