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Old 21-10-2011, 12:13   #1
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OpenCPN, Mapsource Chartpak

Hi,
Recently I installed OpenCPN and I am quite impressed with the overall functionality and effectiveness of the display. I was disappointed that my old Maptech Chartpacks aren't supported by OpenCPN. I've read the threads talking about using different chart formats. I converted and calibrated one of my old Maptech Chartpak charts to work with OpenCPN.

I have dozens of old Maptech Chartpack regions and was hoping to use them with OpenCPN. I can't imagine going through the manual steps of converting the tiles to tif/png, stitching together and calibrating for an entire region, let alone several regions. This works fine, but is a lot of work.

Are their reasons OpenCPN doesn't support the Maptech Chartpack format? I assume there's some sort of licensing issue with reading these formats? Aside from conversion cookbook and manual calibration, why isn't there an automated procedure for converting and calibrating these charts? It seems to me that the coordinate system is available in the HDR information, so manually calibrating shouldn't be necessary.

It would be a good enhancement to read these charts or automatically convert. I appreciate the effort and hard work that went into OpenCPN. I've used may other charting software and OpenCPN seems worthy of consideration. Once I can figure out how to get my charts converted, I may consider switching from Coastal Explorer!
Don
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Old 30-10-2011, 04:09   #2
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Re: OpenCPN, Mapsource Chartpak

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Originally Posted by Capt.Don View Post
....
Are there reasons OpenCPN doesn't support the Maptech Chartpack format? I assume there's some sort of licensing issue with reading these formats? Aside from conversion cookbook and manual calibration, why isn't there an automated procedure for converting and calibrating these charts?
......
The pcx/hdr format is old and outdated.It is indeed a format that is not publicly available. For a Free Software application, like OpenCPN to use it, there need to be a clean room reverse engineering effort. No one seems to be interested enough to do this. What it would take is someone like you, with access to the charts and with with programming skills, and a high motivation.
As you have noticed there is not much interest in this format among OpenCPN users. One reason could be that there are more recent alternatives. Check out the thread "NGA 2700 charts". Another reason is of course that they are no longer available.

If you want to push it, by all means, enter a feature request in the tracker.

Looking at the charts you have, anything there that is not covered by the NGA released chart pictures?

Thomas
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Old 10-11-2011, 15:27   #3
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Re: OpenCPN, Mapsource Chartpak

Thomas,
Thanks for the info - I hadn't considered upgrading my chart library with NGA 2700 charts. I'll look into this further - probably good idea anyway, since many of the pcx/hdr charts are quite old!
Don
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Old 13-11-2011, 09:13   #4
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Re: OpenCPN, Mapsource Chartpak

I am looking to install the Open CPN program on my Mac. When I put the early version and charts on my PC I downloaded it from a disk. Everything including the world charts was on the disk. Is this available still and for my Mac?....Philiosophy
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Old 13-11-2011, 09:24   #5
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Re: OpenCPN, Mapsource Chartpak

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I am looking to install the Open CPN program on my Mac. When I put the early version and charts on my PC I downloaded it from a disk. Everything including the world charts was on the disk. Is this available still and for my Mac?....Philiosophy
...""I downloaded it from a disk"....was this an ebay buy or something?OpenCPN doesn't "come" on a disk with a whole set of charts.

Installing OpenCPN | Official OpenCPN Homepage
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