Applying for hydrographic data

The Hydrographic Service has up-to-date data sets at its disposal containing information that is processed into products. The Service offers these hydrographic data in various ways.

Requesting re-use of nautical charts or hydrographic publications

Nautical charts and hydrographic publications are protected by copyright. A licence must therefore be obtained for the re-use of these publications. In some cases, the licence is free of charge. You can apply for a licence using the form below.

The United Kingdom Hydrographic Office (UKHO) processes licences subject to a fee on behalf of the Hydrographic Service. You can also apply to the UKHO for licences for several other countries.

Re-use of hydrographic data is possible via web services and portals. The Hydrographic Service offers these data for instance at the Open Data Viewer as a partner of the Marine Information and data Centre. Further information about web services and portals is contained in the memo ‘Online availability of data from the Hydrographic Service’.

Downloading data via this website

Nowadays, a lot of geographic source data are available online free of charge. The following datasets are available for download from this site:

Is the data you are looking for unavailable? Is the online service insufficient for your needs? If that is the case, you can submit an application for hydrographic data below using the 'Application form for hydrographic data'. Not all data is available free of charge. If you have to pay delivery costs for the data you have applied for, you will receive a quotation. You will also be informed whether providing the data is subject to conditions. If the Hydrographic Service is not the source of the data, you will be referred to the source.

Application form for hydrographic data

Your details

Your application

Part of a nautical chart or hydrographic publication. Purpose
Tidal predictions relative to LAT. Purpose
Depth-averaged currents data. Purpose

If you have applied for Wrecks and obstructions, please enter the reason above.

If you have applied for Other, please enter the description and reason above.

Data format *
Vertical datum

The horizontal coordinate reference system (CRS) for your application is ETRS89/WGS84 (geodetic date). You can indicate the requested vertical CRS value (vertical date) above.

Geographical boundary

If you have applied for Specific area, please enter the northern, southern, western and eastern boundary above.

If you have applied for a Chart number, please enter the number above.

Historical boundary

If you have applied for Historical period, please enter the period (from/to) above.


If you have applied for Grid data, please enter the resolution above.

If you have applied for Point data, line data or areas, please indicate the number of decimal places (m) above.