3rd Planetary Data Workshop 2017 (LPI Contrib. No. 1986) 7005.pdf Desktop Exploration of Remote Terrain (DERT). L. E. Keely1, L. J. Edwards1, and M. C. Malin2, 1NASA (Ames Research Center, Moffett Field, CA), 2Malin Space Science Systems (San Diego, CA). Introduction: A digital terrain model (DTM) is a digital elevation model draped with one or more co- referenced orthoimages. NASA missions have provid- ed numerous DTMs for locations on Earth, Mars, and the Moon. However, these data sets are large and com- plex and somewhat underutilized due to the lack of dedicated software tools and documentation. DERT provides a basic 3D viewer for exploring NASA DTMs on the desktop. Building upon a rich software history from NASA Ames, DERT utilizes a virtual world to visualize and navigate the DTM. Additionally, DERT provides sev- Candor Chasma, Mars (HiRISE) with shadows de- eral tools that aid in understanding the topography and termined with JPL’s SPICE library. spatial relationships of terrain features. Data in both PDS and GeoTIFF formats are sup- ported. Files are preprocessed into multi-resolution image pyramids to improve rendering performance. DERT is open source and available at https://github.com/nasa/DERT. Pre-built releases for OS X and Linux are provided on the website. Terra Cimmeria, Mars (HiRISE) with CRISM chloride deposit layer Apollo 15 Landing Site (LROC) Arabia Terra, Mars (HiRISE) with cutting plane and difference map. Acknowledgements: Support for this work, part of the Mars Reconnaissance Orbiter Project, was provid- ed by NASA. Data are provided by NASA, JPL, Uni- Upheaval Dome, Utah (USGS) with terrain profile versity of Arizona, GFSC, ASU, and USGS. .