S-63 Strange species from the world of charts

[bcn]

We just want to share one chart that did puzzle us the last days.

Thought to be some error displaying the chart, but no, it has this shape and content. One chart, three jig-saw puzzle pieces.

Somebody here who can enlighten us what a cartographer might have thought designing and publishing such a piece of art?
This is the Italian chart IT300910

Hubert

[K_V_B]

Originally Posted by bcn

We just want to share one chart that did puzzle us the last days.

Thought to be some error displaying the chart, but no, it has this shape and content. One chart, three jig-saw puzzle pieces.

Somebody here who can enlighten us what a cartographer might have thought designing and publishing such a piece of art?
This is the Italian chart IT300910

Hubert

Am I right that the three jigsaw pieces are the only pieces this chart covers, which is why Saridinia and Corsica have been reduce to rough shapes? So zoom in on them and see what they show.
It is odd, but looking at the chart catalog for Italy on Chartworld they seem to have several maps of that kind (the whole 3009xx series). I suppose they serve to add detail to other charts, and are not meant to be used as stand alone maps.
How did you get these? As part of a big bundle.

[CarCode]

This is a screenshot with some italian charts I once downloaded from internet. It seems to be dated on year 2005.

Gerhard

[bcn]

Originally Posted by K_V_B

Am I right that the three jigsaw pieces are the only pieces this chart covers, which is why Saridinia and Corsica have been reduce to rough shapes? So zoom in on them and see what they show.
It is odd, but looking at the chart catalog for Italy on Chartworld they seem to have several maps of that kind (the whole 3009xx series). I suppose they serve to add detail to other charts, and are not meant to be used as stand alone maps.
How did you get these? As part of a big bundle.

You can get this chart as a single chart - as all the S-63 charts. It has been published this way and has been updated in 2015. There are other charts from the same series that are showing as well some coverage of Sardinia (land) plus some unconnected offshore details. Zooming in will not show more details. For sure one can add other chart but the question remains what has been the motivation or idea of the Italian Marine to publish such an artifact.

[K_V_B]

Originally Posted by bcn

You can get this chart as a single chart - as all the S-63 charts. It has been published this way and has been updated in 2015. There are other charts from the same series that are showing as well some coverage of Sardinia (land) plus some unconnected offshore details. Zooming in will not show more details. For sure one can add other chart but the question remains what has been the motivation or idea of the Italian Marine to publish such an artifact.

Maybe it is an artifact of detailed marine surveys (maybe for off shore windmill parks) that somehow got in to the chart catalog.

[K_V_B]

Originally Posted by bcn

You can get this chart as a single chart - as all the S-63 charts.

Just something else: Can you also conveniently get bundles of S-63 charts? It is what is keeping me on "proprietary" solutions for the moment. With for example Transas iSailor I can easily get the charts for a whole area, at reasonable prices, without having to dig through lists of S-63 charts...

[bcn]

Chartworld is offering for example Navionics charts sets in S-63 format.

Or you have chart browser programs from Chartworld, Primar or Admiralty that will pick all the charts for a given route.
Australia is licensing their S-63 charts for the leisure market in different sets as well.
Price level as apps, no.

Hubert

[cagney]

I guess that it's because they started ENC charts by converting existing paper charts. Suddenly they found out that there are some minor areas that were not covered at a given scale.
Quick Solution -> make a chart consisting of cells that covers the gaps.
Hopefully they will adjust concerned charts in the future and do away with this kind of ugly stopgap "charts".

Strange solutions exists elsewhere. At least until a few years ago US published ENC-cells with "holes" in, for example.

Thomas

[seandepagnier]

Are you sure that opencpn calculated the regions correctly?

[bcn]

Yes, drawn exactly as shown in the catalogues. See #4 here.

Most probably Thomas gave the correct explanation, but I would like to hear this from an "official" voice.