Inland ENCs

[Netsurfer]

Hi ...

I have a question concerning the use of Inland ENCs.
The German authorities have made all official German Inland ENCs available for free!

So I tested the charts for the river Rhine (54 charts).
When adding them to OCPN's chart selection it looks like you can see in picture 01: The chart boundaries are shown and that's it.

So you have to zoom in to a chart. Then it appears on the chart bar as seen in picture 02, but still no chart is displayed.

Only after clicking on the (green) bar of the chart it is displayed and added to the chart database.

But that's not all - you have to repeat this step for every of the 54 charts!

And even then there is only one displayed at a time even though the charts are of the same scale.

Well, I thought this couldn't be the right way of how things work ...!
So I removed the chart dir and added it again (of course with full rebuild of the DB).
And then by going to the Toolbox and explicitly disabling and re-enabling the Chart Quilting, suddenly all 54 charts were scanned/ added and displayed with quilting on - see screenshot 04!

In the end I wonder if it is possible to have all charts of the same scale being shown without quilting enabled?

Thanks
Gunther

[Netsurfer]

And according to the discussion about the CM93 objects here are two screenshots which show that there are also some minor "unsightly" points:

1. the yellow bouys are rendered as '?'
2. the top marks aren't colored - just all black
3. the signs (No Anchoring etc.) are very large and they do not scale

Gunther

[bdbcat]

Gunther....

First post:
That's what quilting is all about: Multiple charts (cells) onscreen at one time.

Single-chart-mode is just what it says: one chart(cell) at a time.

The behavior you describe is normal. There was no need to re-install the charts to get them to show in quilt mode. Once was enough.

Do you have a link for the German ENC's?

Thanks
Dave

[cagney]

Originally Posted by bdbcat

Gunther....

First post:
That's what quilting is all about: Multiple charts (cells) onscreen at one time.

Single-chart-mode is just what it says: one chart(cell) at a time.

The behavior you describe is normal. There was no need to re-install the charts to get them to show in quilt mode. Once was enough.

Do you have a link for the German ENC's?

Thanks
Dave

Dave

Elektronischer Wasserstraßen-Informationsservice - [Inland-ENC Dateien] also published on the wiki.
A preliminary test indicates that these charts don't quilt normally.

So.....now we are waiting for France to publish free inland charts.
Are there any plans for this at all?

Thomas

[Netsurfer]

Dave ...

Originally Posted by bdbcat

First post:
That's what quilting is all about: Multiple charts (cells) onscreen at one time.

Single-chart-mode is just what it says: one chart(cell) at a time.

That's OK and understood so far.
The problem e.g. is that quilting with the 54 charts (and that's only the river Rhine) tremendously slows down OCPN.
So I guess I was instinctively thinking about anything in between single chart and (full) quilt mode ...

The behavior you describe is normal. There was no need to re-install the charts to get them to show in quilt mode. Once was enough.

I had the feeling that the charts were not recognized on the first attempt. Only the re-enabling of the quilt mode in the toolbox caused OCPN to scan all charts

Do you have a link for the German ENC's?

Sure ...
Downlaod page for the charts (zip archives) by river: Elektronischer Wasserstraßen-Informationsservice - [Inland-ENC Dateien]
Page with an overview (PDF files) by river: Elektronischer Wasserstraßen-Informationsservice - [Inland-ENC der WSV]
All German rivers (PDF file): http://www.wsv.de/service/karten_geo.../pdf/w162c.pdf

Gunther

[yachtman]

has any body else have problems with some of the inland dutch charts failing to display some tiles correctly? as all of those from gunther for the Rhine are ok.

[nohal]

The problem with the Dutch charts is that some of the cells are very badly broken, so the term "displayed correctly" gets very relative there.
It's not an excuse for the fact that the rasterization rules for iENC can be improved quite a bit. Improving it is a time consuming and boring job to do, to say the least.

Pavel

[yachtman]

Thanks for your prompt answer. I had my suspicion when everything else seems to work so well. At least it is not something I have done wrong! The main problem is no river banks , however someof the bouyage shows, and the green border is not defined other than preumebly the corners, as it is box.

[Netsurfer]

Pavel ...

Originally Posted by nohal

The problem with the Dutch charts is that some of the cells are very badly broken, ...

I am not so sure about this as there are reports of several users that the charts display well in other programs like SeeMyEnc 2.0!
And I also could not believe that the Dutch wouldn't correct the charts if they are really faulty.
Maybe it is more likely that these charts trigger an error or a fault in OCPN's rendering mechanism? Or they include things that confuse OCPN?

Gunther

[yachtman]

Just installed seemyenc which is a chart reader only

it is as netsurfer says as an example in seemyenc IR5YS956.000 renders well but only beacons and town names on open CPN


Is there anything us ordinary users can do to help find the problem?

[nohal]

Gunther,
that other software displays the cells differently is pretty normal. The problem with the Dutch charts is that they come from many different sources and it will take the Dutchmen a fair amount of time to standardize them. That's why they say the charts are just for testing on the download page.
Some of the chart authors also like to use very recent versions of 7c's chart production toolchain which produces charts almost noone else supports (part of the answer for why does it display differently, which for for you means better in 7c's own SeeMyEnc)
There is very similar problem with the Czech charts - the authority recently upgraded their software and the charts don't display well anymore in anything but SeeMyEnc. We can have a look at it and can improve the display of those cells, but it takes time I don't have right now. As I told you a few times before, the rasterization rules are non-programer work almost anybody can do. So far nobody did

Pavel

[NAV]

I wouldn't put any effort in this, until the authorities (like here in The Netherlands) have sorted things out and offer final versions of the inland charts. Remember that both IENC and IAIS are still a very recent development.

[yachtman]

Originally Posted by nohal

the rasterization rules are non-programer work almost anybody can do.

Pavel

So what is the work involved, how could I do it? Or is that one of those questions that if you ask, it shows you dont have the skills?

[nohal]

yachtman...
I really can't judge your skills
Have a look at OpenCPN - Rasterization Rules Editor - Redmine and download the tool I wrote to edit the rules. Then have a look at OpenCPN - Implementing a missing symbol - Redmine and read the tutorial that I hope should get you started.
Next get some reference tool to see how the rasterization should look - SeeMyEnc is good as 7c's tools are popular for creating the charts by European authorities.
The involved standards are also a valuable reading: IENC side of the OEF
If you won't understand something, ask more questions, I will be happy to help you.

Pavel

[Netsurfer]

Pavel ...

Originally Posted by nohal

Gunther,
... We can have a look at it and can improve the display of those cells, but it takes time I don't have right now. As I told you a few times before, the rasterization rules are non-programer work almost anybody can do. So far nobody did

Yes, I know that you have mentioned this a few times ..., but I guess non-programmers have no idea of how this has to be done. And so do I - I don't know anything about rasterization rules and I even did not know that there are different versions depending on the tools used for generation. I thought there is only one standard for all.

In the meantime you have already posted some links to information as a starting point in reply to yachtman. I will have a look at them and ask further questions if I'll discover any problems.

@yachtman and other volunteers:
Maybe we should coordinate the work to avoid duplication of work.

Gunther