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Old 08-11-2014, 03:13   #1
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Opencpn openstreetmap chart formats.

Hello there, this is my first post.

I am sure this topic has probably been flogged to death, I have searched and not found what I am looking for. I am posting in the hope that I have missed something.

I have an eeepc running Debian (yay linux). I have installed opencpn, it works great. Ultimately I want to hook my RTLSDR up to it so I can have an AIS receiver but that is another story.

My question is, does opencpn support openstreetmap(OSM) tile storage? I have my full set of UKHO tiles stored in mobile atlas creator - MOBAC. Mobac can export to a huge number of sqlite database formats and OSM type formats. But there appears to be no overlap between what Oencpn supports and the huge number of formats MOBAC can export.

Please tell me I am missing something. There is some unofficial plugin somewhere that can magic this to happen.

Regards
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Old 08-11-2014, 03:51   #2
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Re: Opencpn openstreetmap chart formats.

No I don't think that you are missing anything. No support for those tiles.
As far as I can remember this has not been discussed at all.
There have been quite a few discussions about OpenSea map. No problems to display their "charts" in OpenCPN.

Thomas
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Old 08-11-2014, 05:26   #3
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Re: Opencpn openstreetmap chart formats.

where did you get UKHO tiles from?

Very interested myself in those.

J
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Old 08-11-2014, 07:08   #4
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Re: Opencpn openstreetmap chart formats.

Quote:
Originally Posted by cagney View Post
No I don't think that you are missing anything. No support for those tiles.
As far as I can remember this has not been discussed at all.
There have been quite a few discussions about OpenSea map. No problems to display their "charts" in OpenCPN.

Thomas
Unfortunately, in some places openseamap tiles are all there is.
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Old 09-11-2014, 22:16   #5
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Re: Opencpn openstreetmap chart formats.

You can make raster charts from open street map. The plan I believe is to export to vector chart format s-57 soon, but not implemented.
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Old 10-11-2014, 07:39   #6
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Re: Opencpn openstreetmap chart formats.

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Originally Posted by boat_alexandra View Post
You can make raster charts from open street map. The plan I believe is to export to vector chart format s-57 soon, but not implemented.
But I do not want rasters of openstreetmap. I already have my full set of UK charts in OSM tile format.

To be honest I am really surprised OSM format is not supported. It really is one of the most mature, open and completely implemented forms of tile map storage.

Just imagine a TMS and WMS feature. You could overlay current weather data. You could have a variety of chart sources.
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Old 12-11-2014, 13:55   #7
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Re: Opencpn openstreetmap chart formats.

Can you describe a little more about which charts you can get in tiles or other advantages in more detail?
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Old 19-11-2014, 06:07   #8
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Re: Opencpn openstreetmap chart formats.

I'd also like to know any other sources relevant for navigation.

The TMS tile format is in wide spread use in GIS (Geographic Info Systems) and google microsoft? all use it.

OSM is a maturing open source mapping colaboration using TMS. I use it on my android phone - osmand is the app. A lot of info is constantly being added including gps tracks users contribute. Similar to google maps together with voice directions etc and can pull in other tile maps like google sat etc. Open Sea map is a spinoff but its lacking traction I suspect thru not enough users and the lack of open hydrographic sources. Last time I looked some time back from memory there were only some small areas in Europe which seemed to have any detail.

It uses standard tile raster format 256x256 pixel tiles almost identical to google maps/sat but also has a binary vector format. In raster as you zoom in each small scale tile is swapped out for four higher res tiles and so on so there is a bit of repetition redundancy and storage requirement grows very fast.

Probably the most usefull addition to OCpn would be to pull in aerial /satellite photos seamlessly via the native tile format. Programatically it should be relatively easy- although beyond me - then there are the copyright issues. The current work around from what I gather on the forum is to create Kap files of images which are then accessible to OCpn. I've done it manually before but its a pain. Not sure if the google earth GE2Kap route is any easier as I have not tried it.

Having satellite images is invaluable especially in reef areas such as Indonesia where charting is very poor. Virtually ignored the Cmap chart and eyeballed with sat pics.
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