Best of 2013

From sailing tips to product information, here’s our month-by-month year in review:


Understanding MaxSea nautical chart references


First MaxSea Training Session successfully achieved


The Maritime standard terms and abbreviations bible


MaxSea TimeZero Spring 2013 Releases


Where does the name MaxSea come from?


The MaxSea TimeZero App is here!!


The Life Cycle of a Marine Chart


Overfishing: Losing Nemo


20 years of the Transat Jacques Vabre Race!


The Different Types of Sailing Explained


Learning how to Release Fish Caught in Deep Waters


Dismasting – What to do if it Happens

The whole MaxSea team wishes you a very happy holiday season! 

Maxsea Card Christmas New Year 2014

Marine chart data treatment

Benefitting from 18 years’ experience in the field of cartography, MapMedia selects the best marine charts available, based on several different criteria: coverage, reliability, level of detail and the date of last update.

MapMedia works with Hydrographic Offices all around the world, as well as with private providers who have demonstrated their reliability and professionalism over many years.

Different marine chart sources

Choosing a local supplier is often the most appropriate option due to their knowledge and expertise in that region. MapMedia therefore consists of a very large marine cartography library, sourced from multiple different vendors, which acts as a very strong basis to start from.

The first stage of production is to create a large digital database in order to make the most of the compiled information.

Compilation of marine charts

There are several forms of delivery media for Raster marine charts, whether paper or digital. The important step of scanning the charts and entering data is required. The title of the chart, the scale, the date of issue, date of revision … all make up what we call meta info.

This information will be available later for MaxSea and Nobeltec software users as well as for users of Furuno products. This information is integrated within digital and vector maps.

The second step involves the geo-referencing and compilation of these marine charts. This process is what allows the chart to be well-positioned in relation to the GPS. Particular attention is always given to this crucial step, to ensure the safety of users.

Division in marine chart zonesThe third step is the conversion of all the data into our own proprietary format called mm3d. This format is optimized for and exclusive to MaxSea marine navigation software and related products.

Again, during this third step, stringent controls are in place in order to ensure the reliability of the finished product. Once this work is completed and validated, the final step may begin: the division of the marine chart into “zones” that will be available to users.

A whole series of tests are then carried out on each product to ensure the reliability, consistency and security of data used in the chart. These marine charts are available for download through our online nautical chart catalog.

5 Tips for Choosing the Best Nautical Chart

The Life Cycle of a Hydrographic Marine Chart

Hydrographic charts are an essential source of data for MaxSea marine charts in order to guarantee the quality of this basic onboard tool for safe sailing while at sea.

Did you ever wonder how MapMedia marine charts are produced? Although the charts are edited by MapMedia, this company uses hydrographic charts collected and then updated by hydrographic offices all around the world. Here, we explain the steps of this process.

To draw up a chart, first we must compile data, edit it and then keep it continuously updated.

The data collection

The hydrographic office first acquires bathymetric, topographic and sedimentological surveys as well as satellite imagery and any additional data needed.

Production of the chart

Once all this data has been compiled and verified, a paper chart is drawn up, following very precise specifications in order to comply with sailing requirements in each specific area.  All the necessary information for sailing and safety are provided on the paper chart. The chart must be both precise and easy to read so that you can sail safely.

This first date of publication is always included on the hydrographic chart. We have included images from the French Hydrographic Office to to explain each point in this post.


The MaxSea TimeZero App is available now!

Chart Updates

Every week, minor or major corrections are reported on the hydrographic chart and then released via the « Groupe d’Avis aux Navigateurs GAN » or “Notice to Mariners – NTM”.

Hydrographic chart NTM

Hydrographic chart NTM

Hydrographic chart NTM

Hydrographic chart NTM

Hydrographic chart NTM

In the case of minor corrections that are not essential for sailor safety, the marine chart is printed again. The date of this new print is mentioned on the chart. A chart can also be printed again if out of stock. The date of the reprint is mentioned on the chart.

When major modifications occur, the hydrographic chart is reprinted. A new publication number and date are added to the chart:

A hydrographic chart publication number and date

A hydrographic chart in Raster format from the SHOM

New chart  SHOM N° 7428

A hydrographic chart from the SHOM

MapMedia compares marine charts and different catalogues and selects the best chart for a specific location in order to provide the most reliable information for safe sailing.


Don’t forget to download this useful guide on how to choose the right marine chart for you:

5 Tips for Choosing the Best Nautical Chart