Slovakia - Fix Spiky Buildings

[Salim Baidoun]

Hello OSM Slovakia,

I would like to announce a new MapRoulette challenge: Slovakia - Fix Spiky Buildings (MapRoulette). We’ve identified buildings on OpenStreetMap (OSM) with oddly sharp angles. Most building corners are close to 90 degrees, but this challenge focuses on buildings where angles are less than 15 degrees. While some might be real, many are likely incorrect data.
 The Task:
 Improve OSM data quality by reviewing the identified buildings and see if their shapes need correction.
 Important Considerations:

-Some buildings, especially historical ones, may have unique angles.

-If unsure, consult the community forum for guidance.-

The task will lead you to the building itself, not necessarily to the specific “spiky” node. Please zoom in carefully and search for the issue.

Why Fix Spiky Buildings?
 Accurate building shapes on OSM benefit everyone! They improve:

-Data quality for various applications

-Navigation services

-Urban planning

-Emergency response

Have Questions?
 Feel free to reply to this message for help, modifying instructions, or suggestions on resources.

Thank you,

Best,
 Salim

[Salim Baidoun]

Apologies for not introducing myself earlier. I'm Salim Baidoun, the Community and Partnerships Engagement and Communications Manager for the EU and Latin America at TomTom. Moving forward, I'll be overseeing all projects in Slovakia and hopefully will engage with all community members.

[Aceman444]

Hi, thank you for the interest in fixing up errors in OSM.

But as usual, please make sure the tasks are fixed by experienced mappers, that know what they are doing. They must not just make any change to make MapRoulette happy. They must use good sources like Ortofotomozaika SR or cadastre layer (available to be added into JOSM and iD editors), not some random fuzzy imagery. If in doubt, they must visit the place, or leave the object alone.

Thanks.

Dátum: pondelok 13. mája 2024, čas: 15:44:51 UTC+2, odosielateľ: Salim Baidoun

[Andrej Shadura]

Hi,

On Mon, 13 May 2024, at 15:41, Salim Baidoun wrote:

I would like to announce a new MapRoulette challenge: Slovakia - Fix Spiky Buildings (MapRoulette). We’ve identified buildings on OpenStreetMap (OSM) with oddly sharp angles. Most building corners are close to 90 degrees, but this challenge focuses on buildings where angles are less than 15 degrees. While some might be real, many are likely incorrect data.

Thank you! Finally, this is getting into MapRoulette. About eleven years ago, I created something similar to help detect spiky buildings, unfortunately, it never had enough exposure to be used by many people (and I myself had only so much energy and eventually stopped).

These spiky buildings usually come from data imported from the cadastre, where if a building sits on top of multiple land parcels, it is split by the parcel boundaries. Sometimes, the building is missing a part (e.g. a roof or something) because that data is not in the cadastre. Unfortunately, nobody validated the data during the import, and now even decades after that we still have the incorrect data.

I hope that this quest being in MapRoulette can help us finally get rid of these data irregularities.

-- 

Cheers,

  Andrej

[Salim Baidoun]

Thank you Andrej and Aceman44 for your valuable input, I will work to include more information on the challenge description.

[Filip C]

Sometimes it is hard to figure out, which buiding have problem.

Like in task https://maproulette.org/challenge/45169/task/227576182 there are 2 buildings nearby each other.

It would be great if it is possible, if the pin will point to the problematic node.

Filip

Dátum: streda 15. mája 2024, čas: 10:20:47 UTC+2, odosielateľ: salim....@gmail.com

[Salim Baidoun]

Thank you for your message Filip C. let me see what I can do and come back to you.

[Aceman444]

This is what I mean:

https://www.openstreetmap.org/changeset/150679060

Some user generating thousands of changesets all over the world, in this case referencing exactly your Maproulette task of "spiky" buildings, claiming source=knowledge (it seems he knows many buildings in the world from memory) and doing it wrong, where a local user had to revert it.
Many of these Maproulette tasks are NOT for casual users to mass-fix in a random way.

Dátum: streda 15. mája 2024, čas: 10:20:47 UTC+2, odosielateľ: Salim Baidoun

[Salim Baidoun]

Good morning Aceman444. 

Is there any recommendation from your side for us?

Salim, TomTom

-- 
Túto správu ste dostali, pretože v Skupinách Google ste odberateľom témy v skupine "Openstreetmap Slovakia".
V prípade, že chcete zrušiť odber tejto témy, prejdite na adresu https://groups.google.com/d/topic/osm_sk/-fEqYRCLJxg/unsubscribe.
Ak chcete zrušiť odber tejto skupiny a všetkých jej tém, pošlite e-mail na adresu osm_sk+un...@googlegroups.com.
Ak chcete zobraziť túto diskusiu na webe, prejdite na adresu https://groups.google.com/d/msgid/osm_sk/0c7247f6-e907-47d4-95d0-54f3c18c5cf2n%40googlegroups.com.

[Aceman444]

Hi.

Another invalid change:

https://www.openstreetmap.org/changeset/150090006

Yes, it seems the way was broken by another mapper to add part of it to the relation so now the area was invalid. However, what the Maproulette editor did, was wrong fix of the situation either.

Can you tell us what the process at Maproulette is?

Is anyone checking the changeset after the Maproulette editors? Who is it and how experienced are they for the particular group of tasks? Or is there no review?

Dátum: štvrtok 30. mája 2024, čas: 10:56:24 UTC+2, odosielateľ: Salim Baidoun

Good morning Aceman444. 

Is there any recommendation from your side for us?

Salim, TomTom

[Filip C]

Dátum: utorok 20. augusta 2024, čas: 20:15:24 UTC+2, odosielateľ: Aceman444

Hi.

Another invalid change:

https://www.openstreetmap.org/changeset/150090006

Toto vôbec nie je zmena z challenge, ktorú spravuje TomTom.

Yes, it seems the way was broken by another mapper to add part of it to the relation so now the area was invalid. However, what the Maproulette editor did, was wrong fix of the situation either.

Používateľ použil editor JOSM, nie maproulette.

Can you tell us what the process at Maproulette is?

Niekto si vytvorí challenge (väčšinou sa jedná o chyby, alebo nejaké malé úpravy). (Vytvoriť challenge môže hocikto)

Potom to ľudia upravia (väčšinou cez iné editory).

Na Maproulette označia, že je to hotové/nedá sa to opraviť/vynechajú daný task/...

Is anyone checking the changeset after the Maproulette editors? Who is it and how experienced are they for the particular group of tasks? Or is there no review?

Nie je tu žiadna kontrola, či to reálne spravil, alebo to len označil ako urobené.

[Aceman444]

Hej, mozno nie TomTom, je to Maproulette, ma tam linku mpr.lt/c/44737/t/224039500 .

Dátum: streda 21. augusta 2024, čas: 19:36:44 UTC+2, odosielateľ: Filip C

[Salim Baidoun]

Hello Aceman444 , 

Is there anything from TomTom side you suggest to do?

Salim

--
Túto správu ste dostali, pretože v Skupinách Google ste odberateľom témy v skupine "Openstreetmap Slovakia".
V prípade, že chcete zrušiť odber tejto témy, prejdite na adresu https://groups.google.com/d/topic/osm_sk/-fEqYRCLJxg/unsubscribe.
Ak chcete zrušiť odber tejto skupiny a všetkých jej tém, pošlite e-mail na adresu osm_sk+un...@googlegroups.com.

Ak chcete zobraziť túto diskusiu na webe, prejdite na adresu https://groups.google.com/d/msgid/osm_sk/f4e1ea7f-3c43-41f9-8c05-71f27e5f8bcdn%40googlegroups.com.

[Salim Baidoun]

Hello OpenStreetMap Slovakia,

I have refilled the [Slovakia - Fix Intersecting Buildings](https://maproulette.org/browse/challenges/43618) MapRoulette challenge with 524 new tasks.

Regards,
Salim,

On Monday, May 13, 2024 at 3:44:51 PM UTC+2 Salim Baidoun wrote:

[Aceman444]

Hi, I don't know if TomTom can do anything.

Maproulette tasks seem to offer misleading instructions like at https://maproulette.org/challenge/51649/task/281079253 (clicking "Upgrade tags" in iD without explanations) which may damage data (other tags than just public_transport=station may be changed by iD now or in a future version).

Also this changeset https://www.openstreetmap.org/changeset/173256092 , where the user has done more harm than good. He seems affiliated with TomTom, maybe you can have some influence there. Only really experienced OSM mappers should be allowed to solve Maproulette tasks, not anyone even with 20000 changesets but consisting of just mechanical "fixes".

Dátum: pondelok 26. augusta 2024, čas: 12:35:44 UTC+2, odosielateľ: Salim Baidoun

Hello Aceman444 , 

Is there anything from TomTom side you suggest to do?

Salim

[Filip C]

Dátum: streda 15. októbra 2025, čas: 0:12:07 UTC+2, odosielateľ: Aceman444

Hi, I don't know if TomTom can do anything.

Maproulette tasks seem to offer misleading instructions like at https://maproulette.org/challenge/51649/task/281079253 (clicking "Upgrade tags" in iD without explanations) which may damage data (other tags than just public_transport=station may be changed by iD now or in a future version).

Autorom tejto challenge je https://www.openstreetmap.org/user/ticho2 odporúčam kontaktovať priamo jeho.