SHOM Raster GeoTIFF Marine Charts – North Sea and Norwegian Sea

Introduction

SHOM raster GeoTIFF marine charts of the North Sea and Norwegian Sea are georeferenced digital charts designed for planning and analysing many types of navigation in Northern Europe. They allow a digital representation of marine cartography to be used in a computer environment or with navigation software compatible with the GeoTIFF format.

The North Sea is a particularly busy maritime area, bordered by France, Belgium, the Netherlands, Germany, Denmark, Norway and the United Kingdom. Further north, the Norwegian Sea provides a transition between the North Atlantic, North Sea, Norwegian coastline and North Atlantic shipping routes.

This region presents highly varied navigation conditions, including coastal navigation, offshore navigation, heavy commercial traffic, port areas, offshore installations, archipelagos, fjords, shoals, currents and sometimes demanding weather conditions.

A SHOM raster GeoTIFF marine chart makes it possible to study the cartography of an area, prepare a route and work with software compatible with georeferenced raster data.

What is a SHOM raster GeoTIFF marine chart?

A raster marine chart is a digital image-based representation of a nautical chart. It therefore preserves the graphical appearance of the original cartography, including its symbols and various hydrographic information.

Depending on the chart reference, it may include:

• soundings and depths;

• bathymetric contours;

• coastlines;

• shoals;

• rocks;

• wrecks;

• hazards;

• buoyage;

• lights;

• maritime infrastructure;

• port and harbour approach information.

The GeoTIFF format adds the information required to georeference the image. Compatible software can therefore position the chart at its actual geographical location.

A GeoTIFF file should be distinguished from a simple TIFF image. A standard digital image does not necessarily contain the geographical information required for use as a chart in navigation software. GeoTIFF combines the cartographic representation with the positioning information.

Why use a SHOM digital marine chart in the North Sea?

The North Sea is one of Europe's busiest maritime areas. It contains major commercial shipping routes, numerous ports, fishing areas, offshore installations and significant recreational sailing activity.

For navigators, chart preparation must take this high level of activity and the particular configuration of the coastline into account.

A SHOM raster GeoTIFF marine chart can be used to:

• prepare coastal navigation in the North Sea;

• study a passage between France and the United Kingdom;

• plan a route towards the Netherlands or Germany;

• prepare navigation towards Denmark or Norway;

• plan offshore navigation;

• study approaches to major ports;

• analyse shoal areas and channels;

• prepare long-distance navigation.

The level of detail depends on the chart reference and its scale. A chart intended to provide a general overview of the North Sea does not necessarily replace a large-scale chart for coastal or harbour approaches.

Raster GeoTIFF marine chart of the North Sea

The North Sea has a particularly varied geography. It includes the French and British coasts, the eastern English Channel, the Belgian and Dutch coasts, the Wadden Sea, German and Danish coasts, as well as the approaches to Norway.

Shallow waters and sandbanks are particularly important in several sectors. Reading soundings, bathymetric contours and information relating to hazards is therefore essential when planning a passage.

Heavy maritime traffic is another major factor in route planning. Commercial shipping routes, traffic separation schemes, regulated areas and offshore installations must be taken into account when preparing a route.

SHOM GeoTIFF marine chart for navigation in the Norwegian Sea

The Norwegian Sea presents a very different environment from the southern North Sea.

It extends between the Norwegian coast, the North Atlantic and the maritime areas north of the British Isles. Conditions can be more oceanic, while the Norwegian coastline has a particularly complex configuration.

Fjords, islands, archipelagos, channels and numerous indentations in the coastline require charting appropriate to each stage of the voyage.

For navigation along the Norwegian coast, choosing the correct scale is particularly important. A general chart can be used to plan the overall route, while larger-scale references are required for coastal approaches, channels and ports.

Navigation along the Norwegian coast

The Norwegian coastline is characterised by a highly indented shoreline. Fjords can extend deep inland, while navigable passages may be surrounded by numerous islands, rocks and shoals.

A raster marine chart preserves a detailed graphical representation of these different features.

When planning coastal navigation in Norway, the navigator can analyse in particular:

• the configuration of fjords;

• soundings and depths;

• shoals;

• exposed or submerged rocks;

• buoyage;

• lights;

• harbour approaches;

• navigable channels;

• regulated areas.

The chart should always be supplemented by up-to-date nautical information and available local data.

Example: navigation from the North Sea to Norway

Consider the example of a sailing yacht departing from France and heading towards the Norwegian coast.

Planning can begin with a chart covering a sufficiently large area to establish the overall route. The navigator can then use appropriate references for the different stages of the voyage.

A route of this type may require successive analysis of:

1. approaches to the French coast;

2. the English Channel or North Sea crossing;

3. areas of heavy maritime traffic;

4. approaches to the Danish or Norwegian coast;

5. coastal areas and destination fjords.

Digital cartography can then be used to work on the route and check the geographical and hydrographic characteristics of the different areas crossed.

North Sea: maritime traffic and navigation

The North Sea is characterised by a high concentration of commercial shipping. Ferries, cargo ships, tankers, offshore service vessels and fishing vessels operate throughout many sectors.

Route planning must therefore take traffic separation schemes and areas subject to specific restrictions into account.

Digital marine charts can be used to study this cartographic information when it is represented on the relevant chart reference.

Actual navigation must nevertheless always incorporate the latest regulatory and nautical information.

Raster GeoTIFF or vector chart: what is the difference?

A raster chart is a georeferenced image reproducing the graphical representation of a marine chart. It therefore preserves the appearance, symbols and cartographic conventions of the reference.

A vector chart consists of separate digital geographical objects. The software can interpret these objects and display them dynamically.

Raster is particularly useful when the objective is to work with a representation close to a traditional marine chart.

Vector technology offers other possibilities for data handling depending on the software and navigation system.

The choice therefore depends on the equipment, software, available data and type of navigation being planned.

Using Adrena, ScanNav and other software

A SHOM GeoTIFF file is not automatically compatible with all navigation software.

Software such as Adrena or ScanNav can use certain georeferenced raster data, but exact compatibility depends on the file, its technical characteristics and the software version.

Before using a SHOM GeoTIFF marine chart, it is therefore recommended to check:

• the format accepted by the software;

• the chart reference;

• geographical coverage;

• scale;

• resolution;

• coordinate reference system;

• map projection;

• compatibility with the software version;

• licensing and terms of use;

• update conditions where applicable.

How to choose a SHOM GeoTIFF marine chart for Northern Europe?

For navigation in the North Sea or Norwegian Sea, several criteria should be taken into account.

The first step is to determine precisely which area needs to be covered. A passage between France and Norway does not have the same requirements as local navigation in a Norwegian fjord.

The following should then be checked:

• exact chart reference;

• geographical coverage;

• scale;

• level of detail;

• resolution;

• coordinate reference system;

• map projection;

• software compatibility;

• terms of use;

• available update information.

This verification makes it possible to adapt the cartography to the intended type of navigation.

Conclusion

SHOM raster GeoTIFF marine charts of the North Sea and Norwegian Sea provide a georeferenced digital solution for planning and analysing many routes in Northern Europe.

The North Sea requires particular attention because of its heavy maritime traffic, shoals, port areas and numerous offshore installations. The Norwegian Sea presents a more oceanic environment and a particularly complex coastline, especially around Norwegian fjords and archipelagos.

The raster GeoTIFF format preserves the graphical representation of the marine chart while allowing it to be geographically positioned in compatible software.

For accurate navigation planning, choosing the correct chart reference and scale is essential. A general chart suitable for offshore passage planning does not necessarily provide the level of detail required for coastal navigation or harbour approaches.

Digital cartography should ultimately be used together with all the information required for navigation, including weather forecasts, tides, currents, Notices to Mariners, regulations, port information and relevant local data.

FAQ – SHOM Raster GeoTIFF Marine Charts of the North Sea and Norwegian Sea

What is a SHOM raster GeoTIFF marine chart of the North Sea?

It is a georeferenced digital marine chart representing SHOM cartography in raster format for a specific area of the North Sea. The GeoTIFF format allows the cartographic representation to be precisely positioned within a compatible environment.

What is a SHOM GeoTIFF marine chart used for in the North Sea?

It can be used to prepare coastal navigation, a North Sea crossing, a route towards the United Kingdom, the Netherlands, Germany, Denmark or Norway, as well as certain offshore passages.

Are SHOM GeoTIFF charts available for the Norwegian Sea?

Coverage depends on the available chart references. The SHOM reference, geographical area and scale of each chart should be checked before using it for navigation in the Norwegian Sea.

Does a SHOM GeoTIFF chart cover the entire North Sea?

This depends on the chart reference. Some charts may cover large areas, while others are intended for more specific sectors. Exact coverage should be checked for each file.

Is a raster GeoTIFF chart suitable for navigation along the Norwegian coast?

It can be used for coastal navigation planning when the reference and scale are appropriate. For fjords, channels, islands and harbour approaches, sufficiently detailed cartography is essential.

Which chart should be used to navigate from France to Norway?

References covering the different stages of the route should be selected, from the departure area in France through the North Sea to the relevant Norwegian sectors. The reference and scale should be appropriate for each part of the voyage.

Why is scale important in the North Sea?

The North Sea contains numerous shoals, banks, channels, port areas and offshore installations. A small-scale chart may be suitable for general planning, while a larger-scale chart is required for coastal navigation and approaches.

Is a SHOM GeoTIFF chart compatible with Adrena?

Adrena can use certain georeferenced raster data. Exact compatibility should nevertheless be checked for the relevant SHOM reference, GeoTIFF file and software version.

Is a SHOM GeoTIFF chart compatible with ScanNav?

ScanNav can use certain georeferenced raster data. The compatibility of the file and software version should be checked before use.

What is the difference between a SHOM raster chart and a vector chart?

A raster chart is a georeferenced image reproducing the graphical representation of a marine chart. A vector chart consists of digital geographical objects that can be interpreted by the software.

Is a SHOM GeoTIFF chart sufficient for navigation in the North Sea?

No. It is a cartographic planning tool and should be supplemented by up-to-date nautical information, weather data, tides, currents, Notices to Mariners and applicable regulations.

Can a GeoTIFF chart be used to plan offshore navigation in the North Sea?

Yes, provided that the chart coverage and scale are appropriate for route planning. More detailed charts may then be required for coastal navigation and approaches.

Why should the exact SHOM chart reference be checked?

Because each reference has its own geographical coverage, scale and level of detail. A chart suitable for general passage planning is not necessarily appropriate for precise navigation in a fjord or for a harbour approach.