[Talk-cz] Question on Fix Spiky Buildings challenge
Vlákno 19.9. - 23.9.2024, počet zpráv: 3
Hi Czechia OSM Community!
My team in TomTom is solving spikes on buildings in Czechia.
In general users creates the building polygons as per the Czech CUZK:KM carto layer. To remove the spike present on the buildings there are certain complications as follows.
* As per the Czech CUZK:KM carto layer we cannot remove the spike as it is matching with the carto layer but not with the reality
* According to the imagery the spike is not present which is contradicting with the Czech CUZK:KM layer
Can you please advice how we can work these issues ?
Example 1:
Task Link: https://maproulette.org/challenge/44790/task/225696185
Way id: way 457207851
Observation: When looked into the OSM data it is found that there is a spike at (49.9735921, 16.776278). Our editor removed the way 457207850 and aligned the way 457207851 as per ground reality.
Before Data
Data post GL Edits
[pic1]
[pic2]
Example 2:
Task Link: https://maproulette.org/challenge/44790/task/225696167
Way id: way 553716939
Observation: When looked into the OSM data it is found that there is a spike at (49.8575, 18.2892678). Our editor modified and aligned the building polygon way 553716939 as per ground reality.
Before Data
Data post GL Edits
[pic3]
[https://lh7-rt.googleusercontent.com/docsz/AD_4nXdCIjnMyqIaSeQE4I28U6n-DQXitk6vwoyitBwbApSURtnQiinTdrCnk0r9zgIF8hAnYL19tsRHCKcC5gRD59AplqTky0fV8tICg67TEU3lmpNgoz54jEzZHA3ARq2caLY3sEuotC3ssvC4j-WdChxvOPPf?key=9Gnn4WaPZhf8sTqRrSy80g]
Example 3:
Task Link: https://maproulette.org/challenge/44790/task/225696242
Way id: way 51800424
Observation: When looked into the OSM data it is found that there is a spike at (49.2225828, 16.5561804). Our editor modified and aligned the building polygon way 51800424 as per ground reality.
Before Fixes
After Fixes
Czech CUZK:KM
[https://lh7-rt.googleusercontent.com/docsz/AD_4nXdZB1DaA2l4gN7OjHXNLdE2788WysOwyPdIj0dWw7y416IpbVNJnfY-wp7BEjA-KiVUIlQmsUIIknViAoloSyb5Gww654PtJzJpqWgdEXCYCVwdHbRxr4LMRGIttk5hyOdgmOPat_qDPrs7Ym7Y9V-jbXF2?key=9Gnn4WaPZhf8sTqRrSy80g]
[https://lh7-rt.googleusercontent.com/docsz/AD_4nXc5uytqlJAmf5EmXoMZiMKZDhItp1bKPNvLMzIfxBeIV59h4AgONVxzaxGTj5afR3PFwspsH1HBCYvzQTvLu14TgJnwgHRVJzkAUWYN3X7ICU-i7Fd9cb7ensyg2IiHwYj3P75wEN-O1mEGSKCItih1YY4?key=9Gnn4WaPZhf8sTqRrSy80g]
[https://lh7-rt.googleusercontent.com/docsz/AD_4nXc3guAPf-kNopJbd6rno-OMSv9wvZvXgm6YZ0LNcZ0xmxcb5f1D_wXnvm0fV7xMHpz68rsbh8kmrYjazPQ9M_YTEw7IeSyVbcxZYaJfZVglPl9iH5fhVeZh0uIZ3LPciQvsLISJ0H6qW4aHJ_KB5Rl0-q7J?key=9Gnn4WaPZhf8sTqRrSy80g]
Thank you
Michal
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Dear Michal,
ad example 1)
At such cases, the preferred workflow is to merge adjacent building
polygons into one building, combining the values of ref:ruian:building.
These are fictional splits required by technical limitations of the current
cadastre. In reality, there is only one building. It solves the spike
problem as a side-effect.
Consult this page:
https://wiki.openstreetmap.org/wiki/Cs:R%C3%9AIAN/Mapov%C3%A1n%C3%AD_budov_a_adresn%C3%ADch_m%C3%ADst#Obrys_budovy_z_vrstvy_R%C3%9AIAN_je_roz%C5%99%C3%ADznut_podivnou_lini%C3%AD
H.
On Thu, 19 Sept 2024 at 10:38, Michal Wlodarczyk via talk-cz <
talk-cz na openstreetmap.org> wrote:
zobrazit citaci
> Hi Czechia OSM Community!
>
> My team in TomTom is solving spikes on buildings in Czechia.
>
> In general users creates the building polygons as per the Czech CUZK:KM
> carto layer. To remove the spike present on the buildings there are certain
> complications as follows.
>
> - As per the Czech CUZK:KM carto layer we cannot remove the spike as
> it is matching with the carto layer but not with the reality
> - According to the imagery the spike is not present which is
> contradicting with the Czech CUZK:KM layer
>
> Can you please advice how we can work these issues ?
>
> Example 1:
>
> Task Link: https://maproulette.org/challenge/44790/task/225696185
>
> Way id: way 457207851
>
> Observation: When looked into the OSM data it is found that there is a
> spike at (49.9735921, 16.776278). Our editor removed the way 457207850 and
> aligned the way 457207851 as per ground reality.
>
> *Before Data*
>
> *Data post GL Edits*
>
> *[image: pic1]*
>
> *[image: pic2]*
>
>
>
> Example 2:
>
> Task Link: https://maproulette.org/challenge/44790/task/225696167
>
> Way id: way 553716939
>
> Observation: When looked into the OSM data it is found that there is a
> spike at (49.8575, 18.2892678). Our editor modified and aligned the
> building polygon way 553716939 as per ground reality.
>
> *Before Data*
>
> *Data post GL Edits*
>
> *[image: pic3]*
>
>
>
> Example 3:
>
> Task Link: https://maproulette.org/challenge/44790/task/225696242
>
> Way id: way 51800424
>
> Observation: When looked into the OSM data it is found that there is a
> spike at (49.2225828, 16.5561804). Our editor modified and aligned the
> building polygon way 51800424 as per ground reality.
>
> *Before Fixes*
>
> *After Fixes*
>
> *Czech CUZK:KM*
>
>
>
> Thank you
>
> Michal
>
>
> _______________________________________________
> talk-cz mailing list
> talk-cz na openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-cz
> https://openstreetmap.cz/talkcz
>
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Hi Jan,
Thank you for the answer and the tips provided. We will also use a guide from your reference.
Have a great day.
Michal
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