Help
Where does SeaMap get the data from?
SeaMap uses nautical data from the OpenSeaMap project. This nautical data is displayed on top of Google Maps.
What is OpenSeaMap?
OpenSeaMap is an open source, worldwide project to create a free nautical chart. In 2009, OpenSeaMap came into life. This free map includes beacons, buoys and other navigation aids. OpenSeaMap is a subproject of OpenStreetMap and uses its database. See this FAQ for more information about OpenSeaMap.
Can I help improve the nautical data?
Yes. At your desktop/laptop, you can edit seamarks by using the JOSM Editor with a plugin called SeaMapEditor.
Is the nautical data cached on my device for off-line usage?
No. Internet access is required to see the nautical data.
SeaMap 
August 27, 2012 at 03:50 |
I downloaded the app and I was under the impression buoys would show. They don’t. And clue.
August 27, 2012 at 07:41 |
The bouys are not shown everywhere in the world. SeaMap mainly covers parts in Europe, like the Baltic Sea and the North Sea. Australia is covered as well, but the United States coverage is very poor.
May 3, 2023 at 04:07
September 9, 2012 at 17:53 |
Openseamap on pc seems to have newer charts.
How often do you upgrade the maps?
can I help?
Groet,
Harrie
September 9, 2012 at 21:10 |
Within SeaMap tap Settings > Clear cache. Next restart SeaMap. This should reload the latest charts from OpenSeaMap.
November 27, 2012 at 01:09
Yes, it did help indeed, thanks!
September 30, 2012 at 18:08 |
Thanks for your help. I boat off of nj and can’t seem to find any markers. Have u tried any other sites or apps?
September 30, 2012 at 23:04
Where/what is NJ? I couldn’t find any other sites that publicly provide markers. Are you aware of any?
September 30, 2012 at 23:09 |
NEW JERSEY
September 30, 2012 at 23:19 |
As far as I can see the United States seem to have a very bad coverage. Coverage in Europe way better (e.g The Netherlands). I know this doesn’t help you…
September 30, 2012 at 23:26 |
It does. Atleast I know I am not doing anything wrong. Have you found a better app
November 27, 2012 at 01:14 |
When can we expect a new version?
I hope the next version can save maps on my sd-card on my smartphone, or did I mis an option?
Regards,
Harrie
November 27, 2012 at 09:01 |
You didn’t miss an option. I plan to work on an update this winter (don’t pin me on that). I hope I can make offline maps available.
December 2, 2012 at 17:38
Thats great! Where I go there is no/bad network coverage, so a offline version would be great.
November 30, 2012 at 21:31 |
I am using seamap for my local waters. This is the Manasquan River in Manasquan NJ. I was under the impression that I would see markers and bouys but nothing shows. Any idea? If they are not on a chart any plans to add it.
November 30, 2012 at 21:46 |
Hi Joel. All bouy data comes from http://www.openseamap.org/index.php?id=openseamap&L=1 . Coverage in Europe is okay, but in the USA it’s very poor. Sorry for that. I hope some people in the USA will help improve it.
February 13, 2013 at 14:21 |
Alex it looks great. only what I’m missing are the depth lines eg. 5 and 10 meters. Are you working on that as well
February 13, 2013 at 21:28 |
Hi Ron. Showing depths is the much requested feature. However I currently don’t know how to add this information. I mainly rely on information that is available via the openseamap project.
June 16, 2013 at 13:35 |
Why can’t i get beacons, bouys, and other nav aids when i open the SeaMap app.
June 16, 2013 at 21:37 |
It depends heavily on where you are on the world. Some areas are covered very good and some are completely not covered. The SeaMap app gets its data from http://www.openseamap.org.
July 4, 2013 at 20:05 |
Its not working
July 15, 2013 at 21:50 |
In which area are you looking? Not all areas in the world are covered. Try the Netherlands in Europe, that’s covered. And come sailing in this country 🙂
September 13, 2013 at 19:33 |
Alex,
Again it seems to me that the updates i made on openseamaps are not yet visible on my android smartphone, despite i cleared the cache and restarted the app. On a PC i can see the updates.
Is ther a delay between
September 14, 2013 at 06:19 |
Hi Harrie. There is a delay in between because the overlay tiles (the part of the map with the bouys) need to be generated again at the openseamap servers. I think the delay is maximum 24 hours but I’m not sure. It could be longer. How long did you wait?
September 17, 2013 at 23:29
I think its now already more than a week ago. Maybe longer..I could check it with joshm, if it helps.
Groet,
Harrie
September 19, 2013 at 20:53 |
Harrie. Did you clear the cache as well after a week? Alex
December 24, 2013 at 15:19 |
Dowload version atualized
February 2, 2014 at 22:59 |
Great app, but can I import a track?
February 3, 2014 at 06:36 |
No. Unfortunately you can’t.
June 27, 2014 at 21:54
I have been trying this but my area in Lowestoft has minimal marks. I can’t seem to edit using my equipment but my old faithful garmin has all the local nav and bouyage marked. Will anyone take my data and add it to the map? I’m willing and able to chart all the buoyage and sandbanks on my next sailing including depth readings if someone will make use of them. Message me cleanimageuk at gmail.com
July 17, 2014 at 23:59 |
Seamap? Funky make. It only shows an usual google LAND map. The term SEA is odd
July 18, 2014 at 07:42 |
Sometimes it takes a few seconds to load, but in countries like The Netherlands it will definitely show sea buoys.
August 11, 2014 at 13:27
A lot of good that does us in Northeast New England.
August 11, 2014 at 13:25 |
Can I get the distance between any two way points ? If not do you know of an app that provides distance, problem with most the don’t show aids to navigation. ..buoys etc.
November 6, 2014 at 23:18 |
Hi Grif. SeaMap doesn’t show the distance between two way points. I don’t know of other app that do. Sorry about that.
June 10, 2015 at 11:08 |
Wonderfull app. When will we se the deeps on the map?
How do the users donate money to SeaMap.
Best regards
Niels
June 11, 2015 at 22:47 |
Hi Niels.
Currently I don’t have active plans to show the deeps on the map. Maybe in the future. It depends on available sources.
And about donating money… well, I would say; buy a beer for you and your friends and enjoy live 🙂
May 14, 2016 at 17:50 |
How make mark between 2 points ? Thank you
May 25, 2016 at 20:27 |
Hi Bader. I don’t know. Maybe you can find the answer behind a link on this FAQ: http://www.openseamap.org/index.php?id=faq&L=1
November 3, 2016 at 22:29 |
i cannot see a Philippines map
November 3, 2016 at 22:38 |
Bouys are not available on all places in the world. They can added via http://www.openseamap.org/index.php?id=openseamap&L=1 .
Alex
August 27, 2017 at 08:52 |
Dear Sir or Madam
Thank you in Advance for your support and reply.
Please let ne know how to set on the map indication of water depth?
Thank you very much.
Yours faithfully
Denis Rykov
August 29, 2017 at 18:11 |
I’m sorry, but that’s not possible. This data is not available on Openstreetmap.
October 4, 2017 at 02:00 |
Good
June 15, 2018 at 19:20 |
Just installed Sea Map but I can see only a regular map. How do I switch to a chart?
June 15, 2018 at 19:27 |
Zoom in. Wait a bit. Not available everywhere in the world, but available in e.g. The Netherlands.
July 30, 2020 at 10:23 |
Can you display the GPS route from Ba delta to Lautoka Wharf route
March 21, 2022 at 23:56 |
Como que eu faço para comprar a carta
March 22, 2022 at 06:04 |
You cannot buy it. It’s free.
September 18, 2022 at 17:48 |
Pelaut