The ERDDAP (National Ocean and Atmospheric Administration’s Environmental Research Division’s Data Access Program) Server is a free and open-source Java “servlet” that converts and serves a variety of scientific datasets using common file formats. The OOI ERDDAP server provides a simple, consistent way to access and download uncabled, telemetered data from OOI moorings and gliders. Datasets can be downloaded in common file formats, such as Python, R, Javascript, and MATLAB, with the capability of creating graphs and maps.

All information about every ERDAPP request is contained in the URL of each request, which makes it easy to automate searching for and using data in other applications. Proficient users can build their own custom interfaces. Many organizations (including NOAA, NASA, and USGS) run ERDDAP servers to serve their data. Because of its widespread use and accessibility, the ERDDAP principal developer and user community have created user guides, instruction videos, and code examples to facilitate access by new users.

Visit the OOI Uncabled Data ERDDAP Server
ERDAP Server Screenshot

FAQs about OOI’s ERDDAP Server

What is available on this server?

Datasets are created once an instrument is deployed in the water, and data exists in the OOI system within the deployment window for the stream.The first server to come online contains uncabled, telemetered data from moorings and gliders.

How do I use ERDDAP?

You can find video tutorials and an ERDDAP table of contents here, and additional information on the landing page here.

How is the data organized?

More than one timestamp is included in the data records (including instrument time, platform time, ingestion time, etc.). The variable “time (UTC)” is the standardized, preferred timestamp to use when creating time series.

Parameter names for the same underlying variable may be different depending on which dataset is chosen, based on whether that dataset contains a derived (L2) data product or a simple L1 data product.

For example:
sci_water_temp in the ctdgv_m_glider_instrument stream (this is the L1 temperature data product produced by the glider CTD instrument)
ctdgv_m_glider_instrument-sci_water_temp in the flort_m_glider_instrument stream (this is the same L1 temperature product, but delivered via the fluorometer because it is used in creating an L2 product)

When a new ERDDAP code deployment takes place, it will be at least 30 minutes before the template changes propagate through the front-end server.

Is ERDDAP freely available?

The repository that contains the development code for the OOI ERDDAP server has been made publicly available here. It is read-only and does not require authentication. You can navigate the projects by clicking on the name and going to the “Browse” heading.