User Services Office
The ORNL DAAC user services office is available to answer questions concerning our data products, access, tools, or policies. Please contact us at 1-865-241-3952, or by email at uso@daac.ornl.gov.
ORNL DAAC WebGIS
The ORNL DAAC WebGIS is an Internet based geographic information system that enables users to browse, query, and display select spatial data using a standard web browser. WebGIS supports Web Map Service (WMS) and Web Coverage Service (WCS) OpenGIS protocols.
Advanced Data Search
Mercury is an ORNL DAAC search engine for discovering and accessing ecological and biogeochemical data. Mercury's Simple Search (also called "Quick Data Search", see text box at top of this page) allows users to perform a full text search of all ORNL DAAC Data Products. Mercury's Advanced Product Search provides an easy-to-use-interface to query by keyword, location, or time peroid, data at ORNL DAAC as well as other data centers across the Internet.
THREDDS Catalog Service
ORNL DAAC's Thematic Real-time Environmental Distributed Data Services (THREDDS) Data Server reads a limited number of ORNL DAAC data sets and allows users to subset them through OPeNDAP, OGC Web Coverage Service, and netCDF. For more information see our THREDDS Data Service Catalog Service page.
MODIS Land Products Subsets
The ORNL DAAC MODIS Land Products Subsets Tools provide summaries of selected MODIS Land Products in text and GeoTIFF format. In addition, data visualizations (time series plots and grids showing single composite periods) are available.
Site Access Suggestions
The ORNL DAAC Web Site uses several features which may not be enabled by the default settings of many Web browsers. If you are having problems please make sure the following features are enabled:
  • JavaScriptSession Cookies
  • Pop-Ups