#3 Re: general discussion » Update Seamarks with List of Lights » 2017-01-11 00:21:54


a) Yes. The renderer places the symbol at the centroid of the area. Many lighthouses have been mapped this way - when the actual building outline was mapped, the mapper often transfered the tags from the original node to the (closed) way or multiploygon.

b) Yes. Sectored lights must have a subscript, even there is only one sector. Very often a single sector is inferred by partial obscuring of an otherwise all-round light. Please do not do this as it makes for a very untidy map. Instead tag it as "seamark:light:visibility=part_obscured" + "seamark:light:information=*" with the details of the visible or obscured arc(s). In other words, only use sectors where there is a navigational intent for the sector arc & not some artifact of the light's siting.


#4 Re: general discussion » INT-1 Base Map » 2016-03-25 16:12:34

The shade of blue I chose is close to the shallow water blue. My intention is to use the GEBCO depth data to generate lighter blues for deeper water. I am thinking of using a light blue (like the shade that you have demonstrated) in the 20-50m range & >50m use white.

#5 Re: general discussion » New renderer » 2016-03-12 13:20:10

I expect to launch my new seamark layer tile renderer very soon. Until then, please nominate test areas that I can do preliminary tests upon. These should contain seamarks of many different types, so that as many of renderer's features are tested as possible.

#7 general discussion » SOTM2016 Brussels » 2016-02-29 17:06:33

Replies: 0

The following was posted to the OSM talk list:

"The SotM accommodation deal is a really good one but we do have a limited number of rooms so I encourage you to book up early. As noted the ticket sale will follow shortly and will be a similar price to Birmingham 2013.

Details at:

Community accommodation ideas:
http://wiki.openstreetmap.org/wiki/Stat … unity_info

We work hard to keep the cost as low as possible and the main way we do this is through sponsorship. If you or someone else is interested in sponsoring SotM 2016 please contact the team on sponsors@stateofthemap.org"

I have made my booking & will be arriving in the afternoon of 22 Sep & leaving on the morning of 26 Sep. Hope to see some of you there!

#8 general discussion » New renderer » 2016-02-29 11:44:31

Replies: 4

I have just published a beta version of the new renderer in its JOSM Imagery Layer plugin form. Please try it out and report any problems, either by opening a ticket here: https://github.com/OpenNauticalChart/S- … ite/issues or a post to this thread. Please provide an OSM file that will cause the problem. If JOSM reports an unexpected exception, please also provide the console output.

To install the plugin, refresh your plugin list and look for "SeaChart" and install it. It is invoked by selecting "SeaChart" in the imagery menu.

The renderer is about 90% complete. Yet to be added are the Brazilian notice marks. You may see some erroneous artefacts in the land area rendering - this is a known problem that I will defer until all the seamark layer rendering is complete.

#9 general discussion » myshiptracking » 2016-02-09 13:56:13

Replies: 1

Does anybody know anything about this organisation?: http://www.myshiptracking.com/ . Its website is very opaque - there is no "About" page, nor any community resources or links.

#10 Re: general discussion » INT-1 Base Map » 2016-02-09 11:40:10

I have rendered Z6-8 globally, Z9-11 Europe & have started Z12-18 Eire/Britain. All three directories are fully populated, mostly with blank tiles. I have deleted the original set of tiles (directories 0-511).

#11 Re: general discussion » INT-1 Base Map » 2016-01-25 16:21:49

OK, given this experience, I could instead generate a set of tiles of zoom-12 size. This would reduce the tile size to ~100kB, but not take up much more space on the server. For lower zooms, I could make a set of sea-, river-, lakes- and land-only tiles at zoom-9 size (these would be much smaller as most of the content of the full-feature tiles is roads, railways, man-mades & landuse). I could also do a set of land- & sea-only tiles at zoom-6 size.

#12 Re: general discussion » INT-1 Base Map » 2016-01-25 13:42:24

No problems with Firefox here.

Is the slow loading a limitation of your upstream bandwidth?

#13 Re: meet & greet » A good idea. Dead or reborn? » 2016-01-14 09:18:09

OpenSeaMap is ruled by a "King", who will not engage with developers. That's why we (not half but most) left. We wanted both the "F" and the "O"!

#15 Re: general discussion » INT-1 Base Map » 2016-01-02 11:04:31

I have started rendering the SVGZ tiles & uploading to the OSeaM tile server. You can find them at: http://tiles.openseamap.org/int1base/<x>/<y>.svgz where x & y are zoom-9 tile numbers. As each tile covers a zoom-9 area, to display at other zooms they will need to be scaled by a factor of 2^(z-9).

Both Olaf & Axel have said that they will work on a base layer using these tiles.

Happy New Year to all!

#16 Re: meet & greet » Best wishes for 2016 » 2015-12-27 16:18:55

Welcome, Martin.

I would like to know more about your ideas on WMS, what data is available & how we might use this.

#17 Re: general discussion » online map » 2015-12-22 09:45:59

Olaf_H wrote:

You can look at Gabi's solution at http://openseamap.he1ix.org/map.html

Nice styling of the control buttons.

Olaf_H wrote:

and Dirks solution at http://maps.grade.de/ol3.html

Good presentation of background maps - they are not as intrusive as the raw OSM map
Object query gives raw tag values - a non-expert plain language mode would be good.

Neither have a lat/lon grid or an edit button - the most important one for mappers!

#18 Re: general discussion » tile server » 2015-12-21 11:05:11

Dirk-- wrote:

I do not know about his change-set routines ...

The shell scripts are also in the renderer repository: https://github.com/OpenSeaMap/renderer/tree/master/work

#19 Re: general discussion » Forum timezones » 2015-12-20 15:40:56

Shawn, you probably need to raise this issue with FluxBB

#20 Re: general discussion » tile server » 2015-12-20 13:24:16

So long as tiles.openseamap.org continues to be a free tile server, I will continue to upload tiles to it. Only if we get shut out, would we need to run our own tile server.

#21 Re: general discussion » (No) new project? » 2015-12-20 10:22:21

I believe that Olaf was only referring to his Online Map re-write, rather than the entire ONC project. Unlike OSeaM, all developers registered on the ONC Github are co-owners and can therefore create new projects, submit pull requests and open issues on all projects or become a team member of a project.

#22 Re: general discussion » online map » 2015-12-19 17:43:51

It would be great if we could put builds of the various contenders on one of our servers so that others could look at the end results. Then us non-webbies could view them with our browsers.

#23 Re: general discussion » INT-1 Base Map » 2015-12-16 16:33:50

Dirk-- wrote:

- no raster tiles (needed to generate .kap charts ...)

These can be generated by command-line calls to Inkscape. This is how I generated the seamark PNG tiles until very recently.

#24 Re: general discussion » harbour layer: skipperguide integration » 2015-12-16 14:08:24

Olaf_H wrote:

I do not like those "let me google for you" buttons.


Google is a commercial bloodsucker.

#25 Re: general discussion » harbour layer: skipperguide integration » 2015-12-16 10:51:30

Dirk-- wrote:

- adding and maintaining links to OSM-db will be a pain
- this also applies to seperate 'harbour-db'

A link only has to added once, whereas the data linked to will be constantly changing. Also it will not be us who add these links - it is the DB operators who would be encouraged to do that work.

Dirk-- wrote:

- click on harbour icon 'Alter Hafen Wismar'
- pop-up key=value box
- offer 'search skipperguide' button/link

Remember 90% of viewers are not mappers - they will not understand keys and their values. Any pop-up box must translate key/value pairs to plain language.

The scheme has to be global, whereas the various harbour DBs only have local extent. Therefore offering specific DB buttons would not be a workable scheme.

If we were to have tags of the form: website:<DB name>=<DB URL>, then harbours/marinas/anchorages with these tags would present the link(s) in the pop-up.

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