Uwe,
On Sat, Jan 13, 2024 at 12:38 AM <gisfi...@t-online.de> wrote:
>
> Markus,
>
> thank you very much for your answer.
> In your example, you used any GRASS map with any columns. They can obviously
> not be written to DGN (eg. MAJORRDS_).
I see - I am not familiar with the DGN format.
> Please note that in my workflow, the DGN is imported into GRASS, then
> processed and then written back. So the GRASS map must have the correct DGN
> colums because it was created from DGN by GRASS itself.
> When I import a DGN and use db.select right after that, I get:
>
> cat|Type|Level|GraphicGroup|ColorIndex|Weight|Style|EntityNum|MSLink|Text|ULink
> 1|17|1|0|2|2|0|||423|{ "32047": [ { "size": 8, "raw": [ "0x1003", "0x7d2f",
> "0x0871", "0x0000" ], "type": "ODBC" } ] }
> 2|17|1|0|2|2|0|||424|{ "32047": [ { "size": 8, "raw": [ "0x1003", "0x7d2f",
> "0x0872", "0x0000" ], "type": "ODBC" } ] }
> 3|17|1|0|2|2|0|||426|{ "32047": [ { "size": 8, "raw": [ "0x1003", "0x7d2f",
> "0x0873", "0x0000" ], "type": "ODBC" } ] }
>
> Then, when I use v.out.ogr -s to skip the cat column, the driver complains
> about the Type column. But that one is undoubtedly part of the fixed DGN
> schema, as you can see above.
> I understand that writing any random colums can not work, but I try to write
> exactly the DGN schema.
>
> Please let me emphasize again that it worked fine for years in GRASS 7.0.
GRASS GIS 7.0 was from Feb 20, 2015 :-) A lot has happened since then.
> I assume there is a bug in the younger GRASS versions. Or has anybody
> succeeded in writing out DGNs?
Note that GRASS GIS is offloading the write-out of the data to
GDAL/OGR. Does ogr2ogr conversion work with your data and a recent
GDAL version?
Overall: the only reasonable way to find out is - since we don't have
your data - to create a reproducible example with e.g. the North
Carolina sample data (essentially what I tried not knowing your
workflow).
Could you provide that?
Best regards,
Markus
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