Services

Participation

If you have realtime sealevel data that you would like to share via this facility, become one of the data provider by sending an email to .

Enter or edit station metadata

Station metadata can be edited manually by the operator responsible for the respective station.
You should register to the "Edit gauges metadata (gauges)" to manage station metadata
Edit station metadata

BGAN service

We provide a service that allows data providers to post messages to the Global Telecommunication System (GTS).
Messages can be provided via a BGAN terminal or any station that is able to do TCP/IP socket communication.
Bgan Documentation

Sealevel Station Catalog (SSC)

The catalog provides an overview of all station identifiers used by the different GLOSS data centers and PTWC (hereafter named the "data centers").
As such the SSC facilitates mapping of data holdings amongst the various data centers.
Three (3) core fields are stored in the database:

name
latitude & longitude
data provider identifier

Additional information is taken directly (synchronized) from the station metadata catalogs of the data centers.
RSS feeds and web services are provided to retrieve information from the SSC.
Data providers are encouraged to verify and/or add their own stations. Feedback welcome via contact
Access the catalog

Direct data access web service

Most of the station descriptive metadata and the station realtime data is accessible through a REST web service.
Users are required to register for this service. Having your contact details will enable us to keep track of the use of this facility, solve performance problems at network level and contact you in case of changes or maintenance activities.
Simply register by sending an email to contact including your IP address and reason for registering.

Notice: Long-term mean sea level (MSL) data is not the aim of this service. See the note on the front page.

FAQ

Outlier detection and spike removal on station graphs

The outlier detection works as follow:

All values X where abs(X – median) > tolerance are hidden.
With tolerance = 3*abs(percentile90 - median)
The statistics (median and percentile90) are calculated on the data being plotted (12h, 1d, 7d, 30d)

For the spike removal we take the median out of a window with size 3.

What does the 'offset' value represents

The offset is the average (from all values in the current start-end time frame), that we subtracted to make sure the graph evolves around zero.
This allows us to align multiple sensors with different offsets on top of each other.
This is a purely mathematical value, not the actual physical offset/datum or absolute sea level

Where can I find the vertical datum information (absolute, referenced sea level)

We only deal with relative data, we don't have the vertical datum information available.
For referenced data you should contact the station operator, or click on the 'Long-term MSL data' link on the station details page.

Via what methods can you deliver data

Real-time sea level data can be delivered in an automated way via:

Global Telecommunication System (GTS): requires you to have access to it
HTTP POST: you upload the data to our website via a HTTP request. See BGAN for more info
HTTP pull: you provide a web service that we can read
FTP upload: you upload to our FTP server
FTP pull: you provide an FTP server that we can read
Socket connection: you provide a TCP port that we can read