Sunday, March 12, 2017

THREDDS

"The goal of Unidata's Thematic Real-time Environmental Distributed Data Services (THREDDS) is to provide students, educators and researchers with coherent access to a large collection of real-time and archived datasets from a variety of environmental data sources at a number of distributed server sites. The THREDDS Data Server (TDS) is a web server that provides metadata and data access for scientific datasets, using a variety of remote data access protocols.

Some of the technology in the TDS:
  1. THREDDS Dataset Inventory Catalogs are used to provide virtual directories of available data and their associated metadata. These catalogs can be generated dynamically or statically.
  2. The Netcdf-Java/CDM library reads NetCDF, OpenDAP, and HDF5 datasets, as well as other binary formats such as GRIB and NEXRAD into a Common Data Model (CDM), essentially an (extended) netCDF view of the data. Datasets that can be read through the Netcdf-Java library are called CDM datasets.
  3. TDS can use the NetCDF Markup Language (NcML) to modify and create virtual aggregations of CDM datasets.
  4. An integrated server provides OPeNDAP access to any CDM dataset. OPeNDAP is a widely used, subsetting data access method extending the HTTP protocol.
  5. An integrated server provides bulk file access through the HTTP protocol.
  6. An integrated server provides data access through the OpenGIS Consortium (OGC) Web Coverage Service (WCS) protocol, for any "gridded" dataset whose coordinate system information is complete.
  7. An integrated server provides data access through the OpenGIS Consortium (OGC) Web Map Service (WMS) protocol, for any "gridded" dataset whose coordinate system information is complete. This software was developed by Jon Blower (University of Reading (UK) E-Science Center) as part of the ESSC Web Map Service for environmental data (aka Godiva2).
  8. The integrated ncISO server provides automated metadata analysis and ISO metadata generation.
  9. The integrated NetCDF Subset Service allows subsetting certain CDM datasets in coordinate space, using a REST API. Gridded data subsets can be returned in CF-compliant netCDF-3 or netCDF-4. Point data subsets can be returned in CSV, XML, or CF-DSG netCDF files.
The THREDDS Data Server is implemented in 100% Java*, and is contained in a single war file, which allows very easy installation into a servlet container such as the open-source Tomcat web server. Configuration is made as simple and as automatic as possible, and we have made the server as secure as possible. The library is freely available and the source code is released under the (MIT-style) netCDF library license."

http://www.unidata.ucar.edu/software/thredds/current/tds/

RELATED SOFTWARE

docker-thredds - A Docker container for THREDDS.

https://github.com/axiom-data-science/docker-thredds

TdsConfig  - Contents of TDS configuration directories for several variants including a TDS serving all Unidata IDD data

https://github.com/Unidata/TdsConfig 
 


Quickstart
$ docker run \
    -d \
    -p 80:8080 \
    -p 443:8443 \
    axiom/docker-thredds
Production
$ docker run \
    -d \
    -p 80:8080 \
    -p 443:8443 \
    -v /path/to/your/ssl.crt:/opt/tomcat/conf/ssl.crt \
    -v /path/to/your/ssl.key:/opt/tomcat/conf/ssl.key \
    -v /path/to/your/tomcat-users.xml:/opt/tomcat/conf/tomcat-users.xml \
    -v /path/to/your/thredds/directory:/opt/tomcat/content/thredds \
    -v /path/to/your/data/directory1:/path/to/your/data/directory1 \
    -v /path/to/your/data/directory2:/path/to/your/data/directory2 \
    --name thredds \
    axiom/docker-thredds

ncSOS - SOS on top of THREDDS

https://github.com/asascience-open/ncSOS

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