Split CH converters

[saidy-moregeo]

Updated code list that needs merging fiboa/fiboa.github.io#28

[m-mohr]

Updated code list that needs merging fiboa/fiboa.github.io#28

Why does a split require a new code list?

[saidy-moregeo]

Updated code list that needs merging fiboa/fiboa.github.io#28

Why does a split require a new code list?

Not a new just added translated_name,HCAT3_name,HCAT3_code.

[m-mohr]

The license for the ones with attribution, should probably be simply CC-BY.
For the ones without attribution requeirement it seems to be CC0.
For all other we can only link to the terms of use, as we don't have a license.

Terms of use are different from licenses, we only provide license information normally so we can restrict it to that where we know it.

[m-mohr]

A few more things before merging (assuming the license scheme from my earlier comment gets implemented):

• Licenses and attribution: Ensure we have this correct and explicit for every Kanton
• Move the per-canton boilerplate (short_name, title, description, provider, attribution suffix, license, data_access) into a CANTONS table in ch_base.py. Each file then only sets canton.
• ch_zh / ch_sz: use the new WFSConverterMixin (see Refactor WFS reading into a generic mixin #136 #321) instead of hand-built requests.
• file_migration in GE/ZH/SZ repeats the same rename and fill steps. One shared version with a source_columns dict would cover all three.
• Tests: one shared lnf_code.csv instead of five partial copies. _convert_swiss re-runs fixtures that test_convert.py already covers.
• ch_base.get_urls: unknown variants fall through to geodienste, e.g. ch_zh --variant 2016 converts the current file and labels it 2016. Only an explicit None entry should do that; anything else should raise.
• ch_sz: "2025": None points at the live geodienste file and will return 2026 data after the next update.
• next(...) without a default raises a bare StopIteration for a missing canton
• CHANGELOG: Maybe update the changelog entry to be a couple of short bullet points under a ch entry, place them in the correcponding category.
• GR attribution repeats "Landwirtschaftliche Nutzungsflächen".

[m-mohr]

Thanks, this looks much better. The per-canton licenses and attributions now match geodienste.ch, and the refactor covers everything from the checklist.

One thing left before merging:

ch aggregate (ch.py) was not updated

• The license is still "opendata.swiss terms: Open use. Must provide the source.". That isn't one of the three agreed forms (CC-BY-4.0 / CC0-1.0 / link to terms).
• It still includes every "Frei erhältlich" canton, including SG and GR, which only have terms of use. SG's terms (§18) require approval before the data is passed on or published.
• The attribution is still the generic "Kantone, via geodienste.ch", which doesn't meet CC-BY.

With the CANTONS table this is now easy:

• Keep only cantons that are OPEN and have CC-BY-4.0 or CC0-1.0 in CANTONS.
• Set license = "CC-BY-4.0".
• Build attribution by joining the included cantons' source entries.
• Adjust the description, which says "every canton that publishes them openly".

[ivorbosloper]

Code goes x7 (60 lines to 400), but I now see it makes sense, in order to accomodate license and attribution differences and individual conversion/download variations.

[saidy-moregeo]

Thanks, this looks much better. The per-canton licenses and attributions now match geodienste.ch, and the refactor covers everything from the checklist.

One thing left before merging:

ch aggregate (ch.py) was not updated

• The license is still "opendata.swiss terms: Open use. Must provide the source.". That isn't one of the three agreed forms (CC-BY-4.0 / CC0-1.0 / link to terms).
• It still includes every "Frei erhältlich" canton, including SG and GR, which only have terms of use. SG's terms (§18) require approval before the data is passed on or published.
• The attribution is still the generic "Kantone, via geodienste.ch", which doesn't meet CC-BY.

With the CANTONS table this is now easy:

• Keep only cantons that are OPEN and have CC-BY-4.0 or CC0-1.0 in CANTONS.
• Set license = "CC-BY-4.0".
• Build attribution by joining the included cantons' source entries.
• Adjust the description, which says "every canton that publishes them openly".

@m-mohr as per our discussion we will drop ch to avoid having one license to cover cantons with different terms and just retain the per-canton converters.