Franz-Josef-Land.info uses geographic, environmental, historical, and scientific data from multiple sources to explain the islands, glaciers, sea ice, coastlines, bathymetry, expedition routes, and changing environment of Franz Josef Land.
No single dataset can describe the archipelago completely.
Modern maps may combine:
- coastline data,
- satellite imagery,
- glacier inventories,
- elevation models,
- bathymetry,
- sea-ice observations,
- historical expedition maps,
- place-name records,
- and manually researched geographic information.
Our approach is therefore based on a simple principle:
maps and datasets should be treated as evidence with identifiable sources, dates, scales, methods, and limitations.
A map is not simply a picture.
It is a representation assembled from data.
Understanding where those data come from is essential for interpreting the map correctly.
Why We Publish Our Map and Data Sources
Franz Josef Land is unusually difficult to represent accurately.
The archipelago includes:
- roughly 190 islands,
- extensive glaciers,
- marine-terminating ice fronts,
- narrow straits,
- changing coastlines,
- seasonal sea ice,
- remote terrain,
- and numerous historical place-name variants.
Some features visible on nineteenth-century maps no longer appear on modern maps because they were based on incorrect observations.
Other differences are real physical changes caused by glacier retreat or improved identification of coastlines beneath former ice connections.
For this reason, readers should be able to distinguish between:
historical geography
and
modern geographic data.
This page identifies the principal types of map and data sources that may be used across Franz-Josef-Land.info.
Modern Base Maps
Modern reference maps may use several different geographic datasets depending on scale and purpose.
A regional locator map requires very different data from a detailed map of Cape Flora or a glacier boundary.
We therefore select map data according to:
- required scale,
- geographic precision,
- licensing,
- date,
- and suitability for the subject.
Natural Earth
Natural Earth is one source that may be used for broad regional and world maps.
It provides free vector and raster geographic data at approximately:
- 1:10 million,
- 1:50 million,
- and 1:110 million scales.
Natural Earth states that its data may be used freely in any type of project.
It is particularly useful for:
- Arctic locator maps,
- country context,
- oceans,
- broad coastlines,
- and regional overview maps.
However, it is not designed for highly detailed mapping of individual Franz Josef Land islands.
A 1:10 million dataset is appropriate for regional visualization, not meter-level coastal analysis.
OpenStreetMap
Some interactive or detailed geographic maps may use information from OpenStreetMap.
OpenStreetMap is a community-maintained geographic database distributed under the Open Database License, or ODbL.
Its licensing requires attribution to OpenStreetMap and its contributors, and certain derivative database uses may carry share-alike requirements.
Where OpenStreetMap data are used, attribution should normally include wording such as:
© OpenStreetMap contributors
with an appropriate link to the OpenStreetMap copyright and licensing information.
OpenStreetMap can be valuable for named geographic features and modern map interfaces, but data completeness varies by location.
Remote High Arctic areas may contain less detailed information than populated regions.
Satellite Imagery
Satellite observations are among the most important modern sources for Franz Josef Land.
They can reveal:
- coastline geometry,
- glacier boundaries,
- snow cover,
- sea ice,
- exposed rock,
- lakes,
- cloud conditions,
- and environmental change through time.
Different satellite systems have different spatial resolution, revisit frequency, spectral capabilities, and observation histories.
Landsat
The Landsat program provides one of the longest continuous satellite records of Earth’s land surface.
Landsat products in the U.S. Geological Survey archive have been available for users to download at no cost since 2008. USGS EarthExplorer provides access to Landsat and more than 120 other satellite, aerial, elevation, and land-cover datasets.
Landsat is particularly valuable for Franz Josef Land because it supports comparison across decades.
Possible uses include:
- tracing glacier retreat,
- comparing exposed coastlines,
- examining changing snow cover,
- identifying ice-free land,
- and comparing modern geography with older maps.
When Landsat data are used, the image acquisition date matters.
A glacier boundary visible in 1985 is not necessarily representative of the same glacier today.
Copernicus Sentinel Data
The European Union’s Copernicus program provides another important source of Earth-observation data.
Copernicus states that Sentinel satellite data and Copernicus information products are generally provided on a free, full, and open basis, with limited exceptions related primarily to security-sensitive services.
Sentinel imagery can be useful for:
- recent glacier mapping,
- coastline observation,
- sea-ice monitoring,
- surface classification,
- and repeated observation of Arctic landscapes.
Modern Sentinel missions provide observations at substantially greater spatial and temporal detail than many older satellite datasets.
When Sentinel data are used, the relevant mission, acquisition date, and processing level should be retained where practical.
Glacier Data
Because Franz Josef Land is one of the most heavily glaciated archipelagos in the Arctic, glacier datasets are central to many maps on this site.
Glacier maps may show:
- individual glacier outlines,
- ice caps,
- glacier complexes,
- marine termini,
- glacier area,
- or changes between observation periods.
Randolph Glacier Inventory
The Randolph Glacier Inventory, or RGI, is a widely used global glacier inventory.
Version 7 organizes the Russian Arctic as Region 09 and specifically identifies:
09-01: Franz Josef Land
as its own subregion.
RGI 7 provides several types of glacier products, including:
- individual glacier outlines,
- glacier complexes,
- glacier boundaries,
- and associated glacier attributes.
The data are provided in geographic coordinates referenced to the WGS84 datum.
RGI is particularly useful for:
- glacier-location maps,
- glacier inventories,
- regional glacier statistics,
- and comparison with other Arctic glacier regions.
However, glacier outlines represent the observation period used to create the inventory.
They should not automatically be interpreted as the exact present-day glacier boundary.
GLIMS
The Global Land Ice Measurements from Space, or GLIMS, database contributes glacier outlines and associated information used in global glacier inventories including RGI.
Individual glacier records may originate from different observation dates and analysts.
For that reason, maps derived from glacier inventories should retain information about dataset version and observation age whenever those details affect interpretation.
Bathymetry
Understanding Franz Josef Land also requires mapping the sea around the islands.
Bathymetry describes the depth and shape of the seafloor.
This is important for understanding:
- straits,
- shelves,
- deep channels,
- walrus feeding habitat,
- ocean circulation,
- ship routes,
- and glacial history.
GEBCO
The General Bathymetric Chart of the Oceans, or GEBCO, provides global bathymetric and terrain grids.
The current GEBCO 2026 Grid is a global terrain model using a 15 arc-second grid and includes both ocean-depth and land-elevation information.
GEBCO states that its grid is placed in the public domain and may be used free of charge, subject to its terms and disclaimer, while requesting appropriate acknowledgment in publications.
GEBCO data can be useful for:
- regional bathymetric maps,
- illustrating the Barents Sea shelf,
- mapping underwater channels,
- and showing the relationship between Franz Josef Land and the wider Arctic Ocean basin.
Bathymetry should not be treated as uniformly precise everywhere.
GEBCO combines multiple underlying data types, including direct soundings and modeled or interpolated information.
Its accompanying Type Identifier Grid helps users identify the type of underlying source used for individual areas.
International Bathymetric Chart of the Arctic Ocean
For Arctic-specific seabed mapping, the International Bathymetric Chart of the Arctic Ocean, or IBCAO, is particularly relevant.
IBCAO aims to compile available bathymetric information north of 64° N into a digital Arctic seabed database.
The dataset is incorporated into the larger GEBCO framework. Version 5.2 was released in June 2026.
IBCAO may be useful for maps explaining:
- Franz Josef Land’s position on the Barents shelf,
- the northern Barents Sea,
- the deeper Arctic Ocean,
- and submarine geography surrounding the archipelago.
Sea-Ice Data
Sea ice is not a fixed cartographic feature.
Its extent and concentration change:
- daily,
- seasonally,
- annually,
- and over decades.
For this reason, a map labeled simply:
Sea Ice Around Franz Josef Land
is incomplete unless it includes a date or reference period.
National Snow and Ice Data Center
The National Snow and Ice Data Center, or NSIDC, provides widely used Arctic sea-ice datasets.
Its Sea Ice Index includes consistently processed daily and monthly information on:
- sea-ice extent,
- concentration,
- anomalies,
- and long-term trends.
The record extends back to the satellite era beginning in 1979.
NSIDC also provides archived:
- daily imagery,
- monthly imagery,
- sea-ice extent values,
- area data,
- and GIS-compatible sea-ice shapefiles.
These datasets are useful when explaining:
- winter versus summer sea ice,
- long-term Arctic trends,
- seasonal minimum and maximum conditions,
- and historical comparisons.
However, Arctic-wide sea-ice datasets may not always have sufficient resolution for detailed interpretation around a single narrow Franz Josef Land strait.
Historical Maps
Historical maps form a separate category from modern geographic data.
They may include:
- Julius Payer’s maps,
- Benjamin Leigh Smith’s surveys,
- Jackson-Harmsworth expedition maps,
- Nansen route maps,
- Wellman expedition maps,
- Abruzzi expedition maps,
- Ziegler expedition maps,
- Russian and Soviet maps,
- and other historical cartographic sources.
These maps should not be treated as modern basemaps.
Their value lies partly in their inaccuracies.
They document:
- what explorers knew,
- what they believed,
- where uncertainty existed,
- and how the geography of Franz Josef Land was gradually corrected.
Historical Map Georeferencing
When an old map is compared with modern geographic data, it may be georeferenced.
This means aligning the historical map with known modern coordinates.
Georeferencing can help reveal:
- mapping errors,
- differences in coastline position,
- changing glacier fronts,
- historic expedition routes,
- and changing place names.
However, georeferencing does not make an old map more accurate than the original observations.
Stretching or rotating an old map to match modern coordinates can introduce distortion.
Any resulting comparison should therefore be interpreted cautiously.
Expedition Routes
Historic route maps may be reconstructed from:
- expedition journals,
- published maps,
- recorded coordinates,
- diaries,
- ship logs,
- and later scholarly reconstructions.
A route line drawn on a modern map should not automatically be interpreted as GPS-level accuracy.
Nineteenth-century explorers often estimated their positions under:
- moving sea ice,
- poor visibility,
- severe weather,
- and limited astronomical observation conditions.
Therefore a reconstructed expedition route may represent:
approximate historical movement
rather than an exact track.
Where appropriate, route maps should be labeled accordingly.
Place-Name Data
Franz Josef Land place names are especially complicated.
A location may have:
- an original expedition name,
- a German spelling,
- an English form,
- a Russian name,
- a Soviet rendering,
- or several transliterations.
Modern maps may therefore use a different label from a nineteenth-century expedition map.
Our place-name research may draw from:
- original expedition maps,
- national libraries,
- polar institutes,
- historical geographic literature,
- modern geographic databases,
- and recognized institutional sources.
Alternative names may be stored as aliases so readers can identify the same feature across different maps.
Coordinates
Coordinates may come from several types of sources.
These can include:
- modern geographic databases,
- GIS datasets,
- satellite-derived mapping,
- protected-area records,
- and historical expedition observations.
Modern reference coordinates normally use WGS84 or another clearly identified modern coordinate system.
Historical coordinates are preserved when relevant to expedition history.
They should not automatically replace modern coordinates for geographic reference.
Elevation Data
Elevation may come from:
- satellite-derived digital elevation models,
- topographic maps,
- glacier datasets,
- or regional terrain models.
Different models may report slightly different elevations because of:
- spatial resolution,
- observation date,
- vertical reference system,
- snow or ice conditions,
- and measurement technique.
Therefore a mountain or ice-cap elevation should not be presented with unnecessary precision when the underlying data do not support it.
Coastline Data
Coastlines in Franz Josef Land present unusual problems because many shores are glacier-covered.
A map may need to distinguish between:
- exposed bedrock coastline,
- glacier front,
- ice-covered shoreline,
- and temporary sea-ice edge.
These are not the same thing.
Glacier retreat can expose previously hidden coastline.
A glacier that once connected two areas may retreat far enough for a channel or separate island to become visible.
For this reason, coastline data should be associated with an observation date whenever change is significant.
Data Dates Matter
One of the most important rules used across Franz-Josef-Land.info is:
a dataset describes a time period, not timeless reality.
Examples:
A Landsat scene from 1986 represents conditions in 1986.
A glacier inventory may represent outlines mapped around a target observation year.
A sea-ice map represents a particular day or month.
A historical map represents the geographic knowledge of its era.
A modern bathymetric model represents the best compilation available when that version was released.
Dates should therefore be preserved whenever they materially affect interpretation.
Dataset Versions Matter
Scientific datasets are updated.
Examples include:
- Randolph Glacier Inventory versions,
- GEBCO annual releases,
- NSIDC sea-ice products,
- satellite processing collections,
- and geographic database revisions.
When practical, Franz-Josef-Land.info identifies the version used.
This allows readers to understand why a map produced later may differ from an older one.
Projection Matters
The Arctic is difficult to display on conventional world-map projections.
A map projection converts Earth’s curved surface into a flat image.
Every projection introduces some distortion.
High latitudes can become particularly distorted in standard cylindrical projections.
Depending on the purpose of the map, we may use:
- polar stereographic projections,
- geographic latitude/longitude,
- regional Arctic projections,
- or another appropriate coordinate reference system.
The chosen projection should support the map’s purpose.
For example, a polar stereographic projection is often more useful for Arctic sea-ice visualization than a conventional Mercator map.
Scale Matters
A dataset appropriate for a world map may be unsuitable for mapping a small cape.
Natural Earth’s 1:110 million data are useful for very broad world maps.
They are not intended to define the exact coastline of Hooker Island.
Similarly, a detailed glacier outline may be unnecessarily complex for a small locator map.
Map precision should therefore reflect both:
source resolution
and
display scale.
Derived Maps
Some maps on Franz-Josef-Land.info may be original visualizations created from external data.
For example, an original map might combine:
- Natural Earth coastlines,
- RGI glacier outlines,
- GEBCO bathymetry,
- historically researched place names,
- and manually reconstructed expedition routes.
In these cases, the finished map is an original visualization, but the underlying data still require attribution where applicable.
A map caption or data note may therefore identify several different sources.
Simplification
Detailed geographic datasets sometimes contain more vertices or features than are useful for web display.
We may simplify geometry for:
- faster loading,
- clearer labels,
- smaller file sizes,
- and improved visual readability.
Simplification should not intentionally alter the meaning of the geography.
A simplified coastline is suitable for an overview map but should not be used for precise measurement.
Approximate Locations
Some historical locations cannot be identified with modern precision.
Examples may include:
- temporary expedition camps,
- sea-ice camps,
- supply depots,
- poorly documented landing sites,
- or locations recorded using uncertain nineteenth-century coordinates.
These may be mapped as approximate points or areas.
Where appropriate, labels such as:
approximate location
or
historically reported position
should be used.
Measurement From Maps
Readers should not assume that distances or areas measured visually from a website map are survey-grade measurements.
Interactive maps can introduce differences because of:
- map projection,
- zoom level,
- source resolution,
- simplified geometry,
- and data age.
Where precise distances or areas matter, we prefer published geographic or scientific measurements rather than estimates taken directly from the displayed map.
Maps Are Not for Navigation
Maps on Franz-Josef-Land.info are intended for:
- education,
- historical reference,
- geographic understanding,
- and scientific illustration.
They are not marine navigation charts.
They should not be used for:
- vessel navigation,
- aviation,
- emergency planning,
- route safety,
- ice navigation,
- or operational travel decisions.
Arctic navigation requires current authoritative charts, weather information, sea-ice data, and professional operational judgment.
A historical or educational map is not a substitute for these resources.
Bathymetric Data Are Not Navigation Charts
The same limitation applies specifically to bathymetry.
GEBCO provides extremely valuable scientific information about seafloor shape, but it is not intended to replace official nautical charts.
GEBCO itself notes that its global grid incorporates heterogeneous data sources and includes limitations and uncertainty.
Bathymetric maps on this site should therefore be treated as scientific and educational visualizations.
Data Quality Varies
No large geographic database is perfectly uniform.
Some areas may have:
- modern high-resolution observations,
- dense ship soundings,
- recent satellite imagery,
- or precise glacier mapping.
Other areas may rely more heavily on:
- older measurements,
- interpolation,
- generalized boundaries,
- or sparse observations.
Franz Josef Land’s extreme remoteness means that data density can vary substantially between locations.
Where those limitations are important, they should be acknowledged.
Multiple Sources May Disagree
It is normal for datasets to disagree slightly.
Possible reasons include:
- different observation dates,
- different definitions,
- different projections,
- different mapping techniques,
- different resolutions,
- glacier change,
- coastline change,
- or data-processing choices.
For example, two glacier datasets can both be legitimate while showing slightly different boundaries if they were mapped in different years.
We do not automatically assume that one difference proves the other dataset wrong.
Open Data Does Not Mean Attribution-Free
Some datasets can be downloaded and reused freely while still requesting or requiring attribution.
For example:
- OpenStreetMap requires attribution and is licensed under ODbL.
- GEBCO requests acknowledgment when its grid is used in publications or presentations.
- Copernicus data are broadly free and open but still carry applicable usage terms and attribution guidance.
We therefore review the specific terms associated with each dataset.
Data Attribution
Depending on the map, credits may include wording such as:
Base map: Natural Earth
Map data © OpenStreetMap contributors
Bathymetry: GEBCO Bathymetric Compilation Group
Glacier outlines: Randolph Glacier Inventory / GLIMS
Satellite imagery: USGS Landsat
Sentinel data: Copernicus
Sea-ice data: NSIDC
Multiple credits may appear together when a map combines several sources.
Our Main Map and Data Source Categories
Franz-Josef-Land.info may use the following categories of sources:
Base Geography
- Natural Earth
- OpenStreetMap
- modern geographic databases
Satellite Imagery
- Landsat / USGS
- Copernicus Sentinel
- other recognized scientific Earth-observation sources
Glaciers
- Randolph Glacier Inventory
- GLIMS
- peer-reviewed glacier studies
Bathymetry
- GEBCO
- International Bathymetric Chart of the Arctic Ocean
Sea Ice
- National Snow and Ice Data Center
- satellite-derived sea-ice datasets
- peer-reviewed Arctic climate studies
Historical Maps
- national libraries
- polar institutes
- museums
- expedition publications
- archival map collections
Expedition Routes
- journals
- diaries
- ship logs
- expedition maps
- scholarly route reconstructions
Place Names
- historical maps
- modern maps
- institutional geographic references
- archival literature
Scientific Statistics
- peer-reviewed research
- scientific datasets
- monitoring programs
- institutional reports
Data Sources Are Selected by Purpose
We do not require every article or map to use every dataset listed on this page.
The correct source depends on the question.
For example:
Where is Franz Josef Land?
A generalized modern basemap may be sufficient.
How did Payer map the islands in 1874?
The original historical map is essential.
How has a glacier retreated?
Multi-date satellite imagery and glacier research are required.
What is the depth of the surrounding seafloor?
GEBCO or IBCAO may be appropriate.
How did Arctic sea ice change since 1979?
NSIDC’s satellite-era sea-ice record is more appropriate.
The source should fit the question.
Corrections and Updated Data
Maps and datasets may be revised when:
- improved imagery becomes available,
- a source publishes a new version,
- place-name errors are identified,
- coastline data improve,
- historical research clarifies a location,
- glacier boundaries are updated,
- or an attribution mistake is found.
When a substantive map error is identified, we aim to correct it in accordance with our Corrections Policy.
Reader Reports
Readers who identify a potential geographic or data error are encouraged to report it.
Helpful reports include:
- page or map URL,
- feature name,
- description of the issue,
- proposed correction,
- authoritative source,
- and coordinates where relevant.
Corrections supported by:
- government geographic data,
- peer-reviewed research,
- institutional archives,
- or clearly documented modern datasets
are particularly useful.
Our Goal
Franz Josef Land was once one of the great blank spaces on European maps.
Its first charted coastlines came from explorers traveling across sea ice with:
- sledges,
- compasses,
- sextants,
- sketches,
- and limited viewpoints.
Later expeditions added channels and islands.
Aircraft provided an overhead perspective.
Satellites made repeated observation possible.
Modern digital maps can now combine coastlines, ice caps, elevation, bathymetry, sea ice, historical routes, and environmental measurements in ways the first explorers could never have imagined.
But greater technological precision does not eliminate the need to ask:
Where did this map come from?
When were the data collected?
What does the dataset actually measure?
How accurate is it at this scale?
What assumptions or limitations does it contain?
Those questions are the foundation of our approach to maps and data.
Franz-Josef-Land.info aims to make geographic information not only visually useful, but also traceable, appropriately sourced, historically aware, and honest about uncertainty.