Contribute.

Nausika does not host its own marine atlas. Every place name, coastline, photo, and multilingual description it serves comes from OpenStreetMap, Wikidata, or Wikipedia — three open projects that anyone can edit. When you fix or enrich one of those sources, your improvement flows into Nausika automatically on the next sync. There is no separate Nausika database to maintain in parallel.

This page is a practical guide to which source to edit for what and how long it takes for the change to show up.

What lives where

Editing OpenStreetMap, Wikidata, or Wikipedia requires a free account on each platform. Each project has its own community guidelines — please follow them.

Fix a place name, location, or services — edit OpenStreetMap

Most things you'll want to fix live in OpenStreetMap (OSM). Use the in-browser editor at openstreetmap.org — click Edit on the map, find the marina or bay, and update the tags.

These are the OSM tags Nausika reads. If a field is wrong or missing in Nausika, find the place on OSM and fix the corresponding tag.

• Name — name, name:en, name:it, etc.
• Type — leisure=marina, seamark:type=harbour, natural=bay, amenity=fuel, leisure=yacht_club.
• Coordinates — drag the node or polygon centroid in the OSM editor.
• Services — harbour:fuel_station=yes, harbour:water_tap=yes, harbour:electricity=yes, harbour:showers=yes, harbour:toilets=yes, harbour:pump-out=yes, harbour:chandler=yes, harbour:visitor_berth=yes, etc.
• Depth — seamark:harbour:depth in meters.
• Capacity — capacity (total berths), capacity:dry_storage.
• Contact — phone (or contact:phone), website (or contact:website), email, vhf.
• Operator — operator.
• Address — addr:street, addr:city, addr:postcode, addr:housenumber.
• Opening hours — opening_hours in the OSM opening_hours format.
• Bay anchorage info — seamark:type=anchorage, seamark:anchorage:category.
• Wikidata / Wikipedia link — wikidata=Q12345 and/or wikipedia=lang:Page Title. These are the bridges that pull in photos and multilingual descriptions (next two sections).

A full reference of OSM marine tags is on the OSM Wiki seamark page. Don't invent new tags — the mapper will only pick them up if they match what we already read.

Add a photo or a multilingual name — edit Wikidata

Wikidata is a structured-data sibling of Wikipedia. Each thing in the world has a Q-number (e.g. Q3909263 for Marina di Pescara). To enrich a Nausika place, find or create its Wikidata item, then add or edit the following statements:

• Multilingual name — set the label in each language you can. Italian, English, French, Spanish, Croatian, German, Greek are the most useful for the Mediterranean.
• Short description — set the description in each language (one sentence: e.g. "porto turistico italiano").
• Main photo — add a statement image (P18) pointing to a file already on Wikimedia Commons. If the photo isn't on Commons yet, upload it first (you'll need to own the rights or have a free license).
• Body of water — add a statement located in/on body of water (P206). Used by Nausika to group places ("all the marinas on the Adriatic").
• Inception year — P571, useful for historic ports / bays.
• Commons category — P373, name of the Wikimedia Commons category that holds the full photo gallery for the place.

Once Wikidata has a statement, Nausika picks it up the next time the wiki refresh runs. If the OSM feature for the place doesn't already have a wikidata=Q… tag, add it on OSM (previous section) — that's the bridge we follow.

Add a long description — edit Wikipedia

Nausika takes the first paragraph of the Wikipedia article (the extract) as the long-form description shown to users in the article's language. To improve it:

• Find the Wikipedia article for the place. If it doesn't exist, you can create one — Wikipedia has a notability bar; not every small marina qualifies, but ports, bays, and well-known marinas usually do.
• Edit the article so the first paragraph clearly explains what the place is. This is what Nausika will surface, so make it informative for a sailor: where it is, what kind of harbour, any notable shelter or hazard.
• Make sure the article has a good infobox image — that's what Nausika uses as a thumbnail when no P18 is set on Wikidata.
• If the Wikipedia article exists in multiple languages, link them via Wikidata so we can pick up descriptions in each language with a single OSM tag.

Nausika supports articles in any Wikipedia language edition (it, en, fr, es, hr, de, ca, sl, gr, …). The OSM wikipedia tag uses the form lang:Page Title — for example wikipedia=it:Porto di Pescara.

How long until Nausika shows my change?

Nausika doesn't pull from upstream after every edit (that would hammer the public APIs). Instead, an operator periodically runs the sync jobs. Today the cadence is on demand; a regular schedule is in the works.

• OpenStreetMap edits — synced when an operator runs the OSM ingest for the relevant region. Typically days, not weeks.
• Wikidata / Wikipedia edits — synced when the wiki ingest runs. Same order of magnitude.

If you've made an edit that's important and you'd like to see it sooner, drop us a line via support and we'll trigger a sync.

What we never override

To respect human and algorithmic curation, Nausika's wiki merger only fills missing fields. If a place already has an Italian name (set by OSM, by an admin, or by a previous sync), a different Italian label on Wikidata will not overwrite it. Photos are appended to the gallery, never replaced. This means it's safe to enrich Wikidata aggressively — you can never destroy curator data by editing upstream.

Reporting a wrong place

If a Nausika place is in the wrong location, has the wrong type, or shouldn't exist at all (an OSM tagging mistake the contributors haven't caught), the cleanest fix is to correct OpenStreetMap directly. If you don't feel comfortable editing OSM, send us the OSM ID via support and we'll route it to the OSM community.

Thank you for helping make recreational sailing in the Mediterranean better-documented for everyone.