[gdal-dev] How to process non-default S-57 layers

[Roelant Ossewaarde]

I am working with S-57-files provided by Dutch Rijkswaterstaat, for
example downloadable from [here] (publicly available). I'm trying to
extract information from the layers with gdal (python).

The Inland charts have layers with OBJL attributes that denote feature
types that do not seem to appear in s57objectclasses.csv:

┌────
│ bash-3.2$ ogrinfo 1R7YM004/1R7YM004.000 Generic |grep OBJL | uniq -c
│ Warning 1: Attributes BCNSHP ignored, not in expected schema.
│ No more warnings will be issued for this dataset.
│ Warning 1: Illegal feature attribute id (ATTF:ATTL[4]) of 17011
│ on feature FIDN=-115676329, FIDS=64091.
│ Skipping attribute. No more warnings will be issued.
│    1 OBJL: Integer (5.0)
│    4   OBJL (Integer) = 17028
│   47   OBJL (Integer) = 17029
│   10   OBJL (Integer) = 17032
│   33   OBJL (Integer) = 17031
│    2   OBJL (Integer) = 17067
│ bash-3.2$
└────

As far as I understand, this means that the encoder used layers that are
non-standard. I see in the s57objectclasses.csv that 17XXX layers are
specific to inland waterways, but these particular layers are missing:

┌────
│ ...
│ 0,"###Codes in the 17xxx range come from past s57objectclasses_iw.csv
(Inland Waterways)",,,,,,
│ 17000,Anchor
berth,achbrt,catach;clsdng;comctn;DATEND;DATSTA;NOBJNM;OBJNAM;PEREND;PERSTA;RADIUS;restrn;STATUS;,INFORM;NINFOM;NTXTDS;PICREP;SCAMIN;TXTDSC;updmsg;,SORDAT;SORIND;,G,Point;Area;
│ 17001,Anchorage
area,achare,catach;clsdng;comctn;DATEND;DATSTA;NOBJNM;OBJNAM;PEREND;PERSTA;restrn;STATUS;,INFORM;NINFOM;NTXTDS;PICREP;SCAMIN;TXTDSC;updmsg;,SORDAT;SORIND;,G,Point;Area;
│ ...
│ 17018,Navigational system of
marks,m_nsys,marsys;ORIENT;,INFORM;NINFOM;NTXTDS;SCAMIN;TXTDSC;updmsg;,SORDAT;SORIND;,G,Area;
│ ... <missing layers?> ...
│ 17050,Notice
mark,notmrk,catnmk;fnctnm;dirimp;disipd;disipu;disbk1;disbk2;addmrk;marsys;ORIENT;CONDTN;NOBJNM;OBJNAM;STATUS;,INFORM;NINFOM;NTXTDS;PICREP;SCAMIN;TXTDSC;updmsg;,SORDAT;SORIND;,G,Point;
│ 17051,Waterway
axis,wtwaxs,catccl;NOBJNM;OBJNAM;,INFORM;NINFOM;NTXTDS;PICREP;SCAMIN;TXTDSC;updmsg;,SORDAT;SORIND;,G,Line;
└────

Am I supposed to add these objectclasses myself to the csv-file? How
would I know which attributes to add for these particular features? Is
there perhaps a simpler way to extract that information?

Kind regards,

Roelant.


[here]
<
https://vaarweginformatie.nl/fdd/main/wicket/resource/org.apache.wicket.Application/downloadfileResource?fileId=4016201503
>
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