Defining and capturing function

[bahimc]

During the first thematic webinar, there was a discussion about the ‘function’ of a building unit.

Whether a building should have a function was discussed, and by extension what should that function be, i.e. definition. This potentially could be defined based on the permitted function or the function it actually has. This function may also change over time.

For the time being, it was agreed that ‘function’ should only be captured at building unit level. Next to that, the project team will make it clear in the usage notes what is meant by the function based on the existing definitions in INSPIRE and OSLO Building.

Should you have any additional comments, do not hesitate to respond to this thread.

[hlorent]

Hello,

The model includes a closed list of functions and natures. The DRI (federal police) had a look at it, and said the proposed list of functions and natures was too restrictive. Here is what the DRI proposes to add in order to meet their business requirements:

Function: • schools • hospitals • airports • ports • train stations • prisons • post offices • fire stations • police stations • community house • hospital • telecommunication tower • Place of worship

Maybe the Nature and Function "other" could be added.

It's a good thing the nature will be captured at the BU level. What about the nature? Indeed, some mosques or jewish temples are occupying a limited space in some buildings while the other values for Nature (e.g. windmill, dam, stadium...) obviously point to complete buildings.

Can't we thus consider the use of a building or a building unit as a mosque or a jewish temple is more functional than linked to the very nature of the building? Additionnally, as these places can be converted to other functional entities, shouldn't we put the mosques and temple in the function table?

Besides, churches and chapels usually have an architecture specifically designed for their function (e.g. nef, bell tower...). Yet, many churches and chapels have lost their religious purpose and were converted to other functions (hotel, night club, library, museum...). Therefore, shouldn't we consider to put the values "chapel" and "church" in the Nature table to keep the information about the architectural peculiarities, and "place of worship" in the function table?

[barthanssens]

FYI, the AAPD / AGDP also has a list of functions / types of buildings and land: ParcelNature, starting page 7 https://opendata.fin.belgium.be/download/TechnicalSpecifications/LandOccupation_20210101_TechSpec_NL.pdf

It includes schools, (train) stations, police station, ....

[hlorent]

Good to know Bart, thanks. The list given by the DRI is based on business needs, and could certainly be completed by the one of the AAPD.

[yarondassonneville]

Based on the discussions during previous webinars as well as comments on this GitHub issue, we propose following codelists for BuildingNatureValue and FunctionValue. This is of course a non-limited list, as during implementation, others are possible.

BuildingNatureValue (appearance Building) | FunctionValue (function - BuildingUnit) -- | -- Arch | Individual Residence Bunker | Collective Residence Canopy | Two Dwellings Castle | More Than Two Dwellings Cave building | Residence For Communities Chapel | Agriculture Church | Industrial Dam | Office Greenhouse | Trade Lighthouse | Public Services Mosque | Ancillary Shed | Place of Worship Silo | Lavatory Stadium | Education Storage tank | Retail Tower | Recreation Synagogue | Infrastructure Windmill | Military Temple | Entertainment Wind turbine | Transportation Parking | Medical Airport |   School |   Hospital |   Port |   Train station |   Prison |   Post office |   Fire station |   Police station |   Community house |   Telecommunication tower |   Parking |   Hotel |   Casino |  

Please let us know what your thoughts are.

Thanks in advance for the contributions.

[cvalvekens]

What about buildings that have 2 or more function values (office on the ground floor and individual residence on the first floor)

[hlorent]

To me, function should be given to BU and nature to building, as BU of the same building might have different functions.

From: cvalvekens @.> Sent: Monday, 7 November 2022 14:28 To: belgif/thematic @.> Cc: Hugues Lorent @.>; Comment @.> Subject: Re: [belgif/thematic] Defining and capturing function (Issue #86)

CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.

What about buildings that have 2 or more function values (office on the ground floor and individual residence on the first floor)

- Reply to this email directly, view it on GitHubhttps://eur06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fbelgif%2Fthematic%2Fissues%2F86%23issuecomment-1305617786&data=05%7C01%7Chugues.lorent%40ngi.be%7C39fd3e817a0849d870c208dac0c3f01c%7Ca7070084ac554dc988342009ecd7519a%7C0%7C0%7C638034245039851216%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=shvvZDvikjCTX7kW2JOaLVQSs%2BL9HRg3PAiYdfpGTJE%3D&reserved=0, or unsubscribehttps://eur06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fnotifications%2Funsubscribe-auth%2FAMMYTGSLRIWKIR54ROR2ZQ3WHD7XHANCNFSM5XX5DDWQ&data=05%7C01%7Chugues.lorent%40ngi.be%7C39fd3e817a0849d870c208dac0c3f01c%7Ca7070084ac554dc988342009ecd7519a%7C0%7C0%7C638034245039851216%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=pgGS5FJbqYUiv%2FaPNKmL29z8iJT6XjnkxQ2Bs4%2BOSHI%3D&reserved=0. You are receiving this because you commented.Message ID: @.**@.>>

Disclaimer https://common.ngi.be/static/legal/disclaimer/

[JanLaporte]

A few remarks:

• All functions in the codelists require unambigious definitions before they can be approved. Plus criteria for units to be able to get a specific function.
• Keep in mind that a building unit is a single entity inside a building. Hence, a function like "two dwellings" is impossible.
• On larger sites (industrial, eductation, hospitals) only the main building will have a building unit. I don't see what nature can be attributed to the other buildings on such sites. Many of the proposed building unit functions should be available in building nature as well.
• How deal with buildings with mixed nature or units with mixed function?

In general, if we want to make buiding unit function a success, then I would create a limited set of functions and link those to an existing source (like functions that can be attributed in a building permit). For inspiration, you can have a look at a proposed set of functions we have in Flanders;

[hlorent]

Nature is non ambiguous and unique for the whole building. It is very important to make a distinction between the nature (basically the external physical of the building, as earlier described) and the function, which is given to a BU. I see in the list that some functions (e.g. fire station) is listed in the "nature" list.

The list used in Flanders is certainly a good base that shall be extended to take into account the external input provided by end users like the police and fire services in the frame of this project (see above).

[yarondassonneville]

Thanks for the comments.

This is now the case. BuildingNatureValue is added on Building level, while functionValue is added on BuildingUnit level. In this case, a Building that consists of multiple BuildingUnits can have of course multiple functions.

As discussed during the last webinar and in order to comply with INSPIRE, we are binded to add currentUse on Building level despite our previous agreement to have this attribute only at buildingUnit level.

Further to this, we also want to streamline the approach towards the semantic around currentUse. We propose to rename the current ‘function’ attribute on BuildingUnit level to ‘currentUse’. Also the codelist will be changed to ‘CurrentUseValue’ to align with INSPIRE.

The codelist and the discussion about the difference between currentUseValue (previously: functionValue) and BuildingNatureValue can be found here.

Please let us know if you disagree with the suggested approach.

[hlorent]

Hello,

Concerning the CurrentUse, this does not make sense: in the case, for instance, of a train station, a hospital or a metro station, where multiple uses are present at the BU level, which one would you use? BU use is of utmost importance for the police.

Regarding INSPIRE, keep in mind there is no obligation, and that differences with the JRC model are allowed (just need to justify). The idea here is to fit with the end-user's needs, isn't it?

Additionally, using a percentage for the use for the whole building is an aggregation that provokes the use of an important information for emergency services, like for instance: where is the shop in the metro station where a woman had a heart attack? Where is the restaurant in the mall the police officers have to search for illegal workers?

[yarondassonneville]

Thanks for the comment.

Both a BuildingUnit as well as a Building can have multiple currentUses (functions).

What other solution do you propose?

[hlorent]

As long as currentUse information is kept at the BU level, it's fine for me. My bad.

[bahimc]

Changes and additions will be made to include “Student room”, “Room”, “Apartment”, “Studio” and “Family home” to currentUse as well as adding “House” to NatureValue. currentUse will be maintained at both Building and Building Unit level, while NatureValue is only at Building level.

The NatureValue will remain the same. Even if there is a shopping mall inside a train station, the NatureValue will be “train station” because of its physical characteristics and the other way around.