THREDDS Data Server Catalog Service

The ORNL DAAC's Thematic Real-time Environmental Distributed Data Services (THREDDS) Data Server (TDS) serves the contents of selected ORNL DAAC data sets through a catalog service and several data access services, that allow users to find and access data sets of interest from within a simple, hierarchial catalog within a Web browser or a compatible client software.

TDS is able to read data sets from various formats, and serve them through OPeNDAP, OGC Web Coverage Service, NetCDF subset, and bulk HTTP file transfer services. Subsetting is available through all methods except bulk HTTP file transfer. Additionally, TDS had the ability to aggregate many files into virtual datasets, which frees users from the many details of file storage and naming, and greatly simplifies user access to large collections of files.


For a limited number of data products, the ORNL DAAC offers a TDS Catalog Service.

Selected ORNL DAAC data products available in TDS:
Tools for Accessing TDS data

The following software tools are available for accessing TDS data:

Additionally, the following list of software for manipulating and displaying NetCDF data is maintained by Unidata:

  • Introduction to ORNL DAAC THREDDS Data Server [PowerPoint] [PDF]
  • Use ORNL DAAC TDS Data Resources in Matlab [PDF]
  • Use ORNL DAAC TDS Data Resources in Python [PDF]
  • Use ORNL DAAC TDS Data Resources in ArcGIS [PDF]

Related TDS Links

The THREDDS Data Server (TDS) was developed by Unidata and uses the Common Data Model to merge OPeNDAP, network Common Data Form (NetCDF), and HDF5 data models.

The following TDS Catalog is maintained by Unidata.