A map of every lighthouse

(mapped.earth)

94 points | by karakoram 2 days ago

27 comments

  • plasticeagle 4 minutes ago
    Aside from the incredibly low quality of the data, this jumps out as being vibe coded due to the unbeleviably stupid text.

    "Rain as a surface; Height is millimetres of rain per day. Nothing else is encoded."

    Why does AI generated ridiculous sentences like these?

  • jvdvegt 34 minutes ago
    Looks nice as already mentioned: pinch to zoom is broken (Firefox on Android here). Also: why am I shown a button labeled 'lighthouses in France' when I'm not actually looking at France?
    • aardvark179 18 minutes ago
      Pinch zoom is also broken on Safari on iOS.
    • BrandoElFollito 29 minutes ago
      Because we have the greatest lighthouses. A lot of people, great people told us we have them. It is true.
  • bobosola 23 minutes ago
    Lovely idea, and a nostalgia trip for me. The sweeping looms brought back some old memories. I worked on merchant ships prior to getting into coding and was the officer of the watch one night crossing the Bay of Biscay going north. It was a clear night with that almost unnaturally still air you get at sea sometimes. I gradually noticed the loom of a lighthouse flashing over the sky just off the starboard bow. I wasn’t expecting landfall so soon and quickly double-checked our position on the chart. I counted the flashes; it was clearly the Phare du Créac'h on the Isle of Ushant. It’s stated as visible at 32 nautical miles, but I was seeing it at almost 90 nautical miles away. The light itself was still below the horizon, but the loom was clearly identifiable (there were no other lights in that area with the same number of flashes and frequency). It must have been some weird temperature inversion effect, but I have never forgotten it. I never saw any other lighthouse from that far away in the rest of my 25-odd years at sea.
  • Waterluvian 2 hours ago
    I like the idea. But it was a bit jarring that panning with my finger took ages and then pinching to zoom insta-faceplanted me into the Labrador interior.

    If anyone wants to mount a rescue, I’m somewhere near a lighthouse.

    • bouchard 2 hours ago
      Even on desktop panning is remarkably slow.
  • zX41ZdbW 1 hour ago
    I have a similar project (which I created in 2024): https://adsb.exposed/

    Among various datasets, it has OSM data (all of it): https://adsb.exposed/?dataset=OSM&zoom=4&lat=52.3756&lng=2.5...

    And here are lighthouses: https://adsb.exposed/?dataset=OSM&zoom=3&lat=40.0444&lng=9.9...

  • jcrawfordor 11 minutes ago
    AI generated with all the attendant quality problems - worst of all the data. There are a lot of non-lighthouses listed on the map, and I can easily come up with a couple of real lighthouses that aren't present.

    I really hate all these vibecoded map projects, because the (debatably) slick looking UI implies that the real work of getting the data has been done. But it hasn't, whoever made this just made a bare minimum effort to slap in some plausible looking (if you don't look too close) data and then walked away. The fact that a lot of it is wrong doesn't matter if it looks good, right?

    • kite42 9 minutes ago
      Yea this project is complete vibe-coded crap. A lot of the lighthouses aren't in the correct locations and some or even missing.
  • rizonio 1 hour ago
    This seems like it maps way more than just lighthouses. Looking at puget sound, at least, it seems to mark all the navigation buoys as lighthouses as well.
    • katzgrau 52 minutes ago
      Thought the same. This is showing highly concentrated “lighthouses” along a river in my area.
  • SkyeCA 2 hours ago
    Pinch to zoom on a macbook makes the entire map sweep across the globe. Makes it very hard to use even if it's a neat idea.
    • pixelesque 2 hours ago
      Happens on desktop with Firefox as well.

      Looks like a bug with the view origin point being mis-matched with what the view's actually focused on - maybe high-DPI scale mis-match?

    • sixothree 1 hour ago
      Sounding like desktop/laptop with a mouse is the only way to interact with this site. It's a great first try though. I spent a few minutes poking around for sure.
      • bluebarbet 29 minutes ago
        >desktop/laptop with a mouse is the only way to interact with this site

        Lamentable if true. Speaking personally, I haven't touched a mouse in well over a decade.

  • alienbaby 2 hours ago
    What an incredibly annoying zoom/spin thing is going on there
  • vortegne 2 minutes ago
    I understand fully vibecoding a fun page like this. But not checking anything or even doing a second pass? Honestly incomprehensible to me
  • frisco 2 hours ago
    Fun fact: lighthouses in a general area will all have different periods so sailors can easily tell them apart and know which one they are looking at
    • pixelesque 2 hours ago
      They also have different fog horn timings as well.
    • runarberg 1 hour ago
      Here is the Icelandic list of lights (isl. Vitaskrá). It includes every light in Iceland. Sailors are supposed to know how to read this and identify a light from their patterns. It is very rear that sailors sail by lighthouses these days though, but an extremely handy skill to have in case your GPS fails for some reason.

      https://www.lhg.is/media/sjomaelingar_islands/Vitaskra_31101...

    • ricksunny 2 hours ago
      sounds like pulsars.
  • themanmaran 1 hour ago
    Fun fact, there is a .gov effort to sell (or give away) a lot of old lighthouses in exchange for agreed maintenance. It's sort of a terrible deal, since you can't live in them or use them for commercial purposes, but you do still have to maintain it to a certain standard. But I'm sure someone is out there with the desire.

    https://realestatesales.gov/our-listing/

    • pants2 1 hour ago
      What would be the reason to buy it then? Just to tell your friends that you own a lighthouse?
      • WinstonSmith84 48 minutes ago
        probably just to keep history alive. A lot of (very) wealthy people buy non-sense because they don't know what to do from their money. Then, why not buying a lighthouse :-)
  • random_savv 12 minutes ago
    it would be even cooler if the blink duration, color, direction, etc were accurate!
  • somebodyistryin 2 hours ago
    I checked the area near my house and there are about 10x more lighthouses shown than really exist. Some are buoys but most don’t correspond to anything.
    • DeliCheese 1 hour ago
      There is one next to me that is not shown, so more of a coastline viewer than a lighthouse one.
  • dochne 2 hours ago
    My favourite bit about people who use OpenStreetMap data for lighthouses is that they end up including <https://www.google.com/maps/@52.2647013,-2.1151705,51a,15y,2...> lighthouse in the exceptionally landlocked Droitwich (shows up as Hanbury Wharf Lighthouse)
    • pixelesque 2 hours ago
      They also often include "pairs" of lighthouses (high / low, front / rear) where newer ones have replaced older ones, but the older structure is still there (and often is now a museum), but isn't the active lighthouse.

      Although this one has done a reasonable job at culling most of those out, at least on the south coast of England.

  • indrex 2 hours ago
    Looks cool but on iPhone can’t zoom with touchscreen, and can’t tap either to select a lighthouse.
  • tbergkvist 2 hours ago
    My M4 macbook pro ramped up it's fans to 100% after being on this site for three minutes
  • nonethewiser 2 hours ago
    The US state with the most lighthouses isnt on the coast.

    I’m talking about the true lighthouse count. I understand there are some issues with this map.

    • nephihaha 2 hours ago
      Do you mean sea coast? Quite a few larger lakes and rivers have them.
  • zeusdclxvi 2 hours ago
    Didnt know there were lighthouses on the French Antarctic Kerguelen Islands
    • nephihaha 2 hours ago
      They are not in a busy part of the ocean, but I suppose it is to warn people away. That archipelago is not fully charted, so it is probably a good idea to keep away from much of its coast. Probably dozens of uncharted reefs.
  • willmeyers 2 hours ago
    It's cool data and I wish the person who prompted Claude to build this would have at least made an attempt to make it optimized and readable. Like, what does "Fl • every 5 s" mean? It's frustrating because this could have been amazing!
  • aeroscissorz1 2 hours ago
    Never knew about lighthouses on land
    • nephihaha 2 hours ago
      They're on rivers, inland seas and large lakes. Russia has a lot because it is heavily reliant on waterways.
  • runarberg 1 hour ago
    This map has very annoying and weird spelling errors, to the point where I suspect this is just AI generated.

    Zooming in to the lights I am intimately familiar with in Suðurnes Iceland (includes the objectively best lighthouse in the World Reykjanesviti) I see “Garðskagaviti” correctly spelled, but the main lighthouse is spelled “Gardjskagi” that letter ð is also misspelled as dh in nearby Sandgerdhi.

    The source for these lights are here https://www.lhg.is/media/sjomaelingar_islands/Vitaskra_31101... and I honestly don‘t know why whichever AI was used to generate this didn’t just copy paste the names from the registry.

    It also annoyingly includes old and spare lights, towers, etc. and doesn’t label them as such.

  • Razengan 1 hour ago
    I love lighthouses, though I've never seen one for real.

    They're like an anti-oasis: Signaling a welcome patch of land in an endless ocean :)

    The Lighthouse is also one of the best movies ever period.

    There should be some indie games based on lighthouses!

  • nephihaha 2 hours ago
    It jumped around when I tried to use it on a mobile phone. I was surprised how few Greenland has.

    I'm fairly sure that there are more in outlying islands of New Zealand. The Chatham Islands seem well marked but there are none marked on Stewart Island or the Snares.

    • pixelesque 1 hour ago
      > but there are none marked on Stewart Island or the Snares.

      The only two lights (they're not 'houses') on Stewart Island are actually on this map.

      The Snares don't have any.

  • mcfedr 2 hours ago
    beautiful map
  • liberian 2 hours ago
    [dead]