Unit of tank volume when importing from UDDF

[Christian Schmitt]

Hi all,

I'm trying to import dives using the UDDF format and noticed one problem: the tank volume is specified as this in my UDDF file:

<tankvolume>0.011</tankvolume>

which corresponds to 11 liters (as UDDF stores the tank volume in cubic meters: https://www.streit.cc/extern/uddf_v321/en/tankvolume.html) but after the subsurface import the tank volume is set to 0 liters. Looking at the UDDF import xslt file  there is no conversion happening at import:

https://github.com/subsurface/subsurface/blob/715bb1305e024cb6195929e10fc7face4172494b/xslt/uddf.xslt#L368

And looking at the gas consumption after the import it looks to me as if subsurface treats this tank as having a volume of 0.011 liters. Is this simply a bug in the import (and the xslt should be corrected to apply the conversion from cubic meters to liters) or is there more going on behind the scenes?

Thanks,

Christian

[Michael Keller]

Hi Christian.

Yes, I think you are right, and our UDDF import (and export) is missing
the conversion between liter and cubic meter.

Are you able to submit a pull request to fix this?


Out of interest, how was the UDDF generated that you are trying to import?


Ngā mihi

  Michael Keller

[Christian Schmitt]

Hi Michael,

the UDDF was generated by MacDive (it looks like MacDive is not actively worked on anymore and so I try to migrate to subsurface). Unfortunately I have no idea how XSLT files work and so I could only guess how it should be corrected (and so far I haven't tried to compile subsurface on my own on my ARM Mac which, as far as there is no ARM version for Mac, I guess is not straightforward).

Cheers,

Christian

[Michael Keller]

Hi Christian.

On 27/09/25 22:26, Christian Schmitt wrote:
> the UDDF was generated by MacDive (it looks like MacDive is not
> actively worked on anymore and so I try to migrate to subsurface).
> Unfortunately I have no idea how XSLT files work and so I could only
> guess how it should be corrected (and so far I haven't tried to
> compile subsurface on my own on my ARM Mac which, as far as there is
> no ARM version for Mac, I guess is not straightforward).

No problem, I can have a go at it, it should be fairly simple.

Are you able to share a sample UDDF file with me that I can use for testing?


Ngā mihi

  Michael Keller

[Christian Schmitt]

Hi Michael,

I have attached one dive in UDDF format that is hopefully useful for testing.

Cheers,

Christian