The THREDDS Data Server user guide documents setup, configuration, catalogs, metadata, and related server services.

docs.unidata.ucar.edu/tds/current/userguide/in…
THREDDS Data Server homepage screenshot

About THREDDS Data Server

The THREDDS Data Server (TDS) is a web server that provides metadata and data access for scientific datasets using OPeNDAP, OGC WMS and WCS, HTTP, and other remote access protocols. It is part of Unidata's THREDDS project to give students, educators and researchers access to real-time and archived environmental datasets from distributed server sites.

It uses dataset inventory catalogs to list data and metadata, reads NetCDF, OpenDAP, HDF5, GRIB and NEXRAD files through the Netcdf-Java Common Data Model, and supports virtual aggregations with NcML, coordinate subsetting, and ISO metadata generation. WMS, WCS and subsetting work only for certain datasets, including gridded data with complete coordinate information, and deployment requires Java and a servlet container such as Tomcat.

Key features

  • Provide metadata and data access via OPeNDAP, WMS, WCS, HTTP
  • Generate dynamic or static dataset inventory catalogs with metadata
  • Read NetCDF, HDF5, GRIB, NEXRAD via Common Data Model
  • Create virtual dataset aggregations using NcML
  • Subset gridded and point data via REST API
  • Generate ISO metadata via optional ncISO server
Best for: Students, educators and researchers who need access to distributed real-time and archived environmental datasets.
Good for
  • Supports OPeNDAP, WMS, WCS, and HTTP access from one server
  • Reads NetCDF, HDF5, GRIB, NEXRAD and others into a common data model
  • Distributed as a single war file for servlet containers such as Tomcat
Watch out for
  • WMS and WCS access requires gridded datasets with complete coordinate information
  • NetCDF Subset Service works only with certain CDM datasets
  • Deployment requires Java and a servlet container such as Tomcat

THREDDS Data Server at a glance

Type
Dataset
Platforms
Web
Last checked
Oct 5, 2026 · Online when checked
Listed
Oct 5, 2026

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THREDDS Data Server FAQ

What is the THREDDS Data Server?
A web server that provides metadata and data access for scientific datasets, using OPeNDAP, OGC WMS and WCS, HTTP, and other remote data access protocols.
What does the NetCDF Subset Service return?
Gridded data subsets in CF-compliant netCDF-3 or netCDF-4, and point data subsets in CSV, XML, WaterML, or CF-DSG v1.6 netCDF files.
What is NcML used for in TDS?
To modify and create virtual aggregations of CDM datasets.
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