ERDDAP™: Easier Access to Scientific Data

Welcome to the ERDDAP GitHub repository

ERDDAP™ is a scientific data server that gives users a simple, consistent way to download subsets of gridded and tabular scientific datasets in common file formats and make graphs and maps. ERDDAP is a Free and Open Source (Apache and Apache-like) Java Servlet developed by the NOAA NMFS SWFSC Environmental Research Division (ERD).

A live ERDDAP installation can be seen at: https://coastwatch.pfeg.noaa.gov/erddap/index.html.

Example screenshot of ERDDAP's web user interface 'Make-a-Graph' page

Developing with ERDDAP

ERDDAP is a Java Servlet-based application and can be run in any compatible Java Servlet Container/Application Server, such as Apache Tomcat.

Local development and testing of ERDDAP code can be done without a production-scale installation. Two approaches are recommended:

• Jetty Servlet Container - see: ERDDAP Development with Maven and Jetty.
• Docker/Tomcat (building and running an ERDDAP development Docker image) - see: ERDDAP Development with Docker/Tomcat

For operational ERDDAP deployment, Apache Tomcat is recommended. See Deploying ERDDAP Operationally for instructions.

Running JUnit tests

Simply run mvn test in a terminal to run the JUnit tests.

Note that by default tests that do an image comparison are enabled. To disable those tests add ImageComparison to the excludedGroups section of the surefire configuration. It is recommended you run the image tests before making changes to ERDDAP so you can generate a baseline set of images that will be later used for comparison.

Building a war

mvn package will create a war file.

If you'd like to skip the tests while building use mvn package -DskipTests. You can use the skipTests flags with other maven commands.

Contributing Code to ERDDAP

Below are relevant links for getting involved with the ERDDAP community and contributing to ERDDAP:

• Review conversations and ask questions at https://groups.google.com/g/erddap or at https://github.com/erddap/erddap/discussions
• Review and submit issues to https://github.com/erddap/erddap/issues
• To propose feature requests, follow this guidance: #93

Deploying ERDDAP Operationally

Instructions for installing ERDDAP in Apache Tomcat are available at: https://erddap.github.io/setup.html.