[Talk-ca] New MapRoulette Challenge - Add Surface to Highways

Fri Jan 27 19:45:33 UTC 2023

Hi Jarek,

It could be difficult for some users to distinguish between specific surface types using only aerial imagery alone. Even if there's ground truth data, like Bing Streetside or Mapillary, depending on the lighting conditions and image clarity, interpretation could be tricky. Flagging a task as Too Hard is an option to cover situations where the user can't confidently make a determination with the available source material.

However, I don't sense a consensus yet on the approach of using Paved versus a specific surface value. Would you prefer that I make the challenge Not Discoverable until there's time to conclude the discussion?

Generally the types of leads that TomTom can generate for potential updates to OSM are usually incidental but spread across wide areas. With that in mind, MapRoulette tends to be a better fit. Although we have used HOT Tasking manager at the request of communities too. We're open to tailoring the approach depending on the need.

I'm interested in learning more about the history of the fords and waterways topic to understand how we can help. Let me know if you'd be interested in joining an online meeting to discuss that topic further.

All the best,
David

From: Jarek Piórkowski <jarek at piorkowski.ca>
Sent: Thursday, January 26, 2023 3:11 PM
To: talk-ca at openstreetmap.org; David Salmon <David.Salmon at tomtom.com>
Subject: Re: [Talk-ca] New MapRoulette Challenge - Add Surface to Highways

You don't often get email from jarek at piorkowski.ca<mailto:jarek at piorkowski.ca>. Learn why this is important<https://aka.ms/LearnAboutSenderIdentification>
Hello David,

Welcome to the list, and thank you for the introduction.

The task description on MapRoulette says "The goal of this challenge is to identify and add missing surface tags on motorways and motorway links as they represent high speed roads, and it is desirable to accurately tag the surface for these highways."

In this specific case, it might be easier to assume in map and router applications that all motorways in Canada are paved unless tagged otherwise. I am not aware of any exceptions, and if some exist, they are probably already tagged as unpaved. I'm seeing an analogy to defaulting to oneway=yes on motorways and only tagging the ways that are oneway=no.

If you are looking for more detail than "paved", can all MapRoulette challenge participants reliably distinguish between asphalt, concrete, and other types of pavement using aerial imagery?

Are you planning on expanding this challenge to other roads, and will those be also done using aerial imagery?

I am a little skeptical about using MapRoulette to obtain precise data like this. I have seen fords wrongly added in southern Ontario by MapRoulette users seemingly more eager to solve the task quickly than to improve the map. These users displayed little familiarity about how roads in the region actually look: crossings of streams are overwhelmingly culverts, and many streams are anyway inaccurate from an old import, but cleanup takes time, so instead they put on the ford tag and moved on. I don't think that kind of challenge really helps the map. But maybe we can set up a MapRoulette challenge to correct ford crossings on roads in southern Ontario that are actually culverts.

Curious to hear your thoughts on data quality and how MapRoulette-sourced surface information helps OSM and TomTom.

Thanks,
Jarek

On Wed, Jan 25, 2023, at 08:03, David Salmon wrote:

Hello Canada OSM Community,

I hope that the beginning of 2023 is going well for everyone.

I'd like to introduce myself - my name is David, and I have picked-up the role of TomTom Community Manager for the United States and Canada from Courtney<https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.openstreetmap.org%2Fuser%2Fcourtiney%2F&data=05%7C01%7Cdavid.salmon%40tomtom.com%7C80e35a13fd2c40e00d9f08daffd986e2%7C374f80267b544a3ab87d328fa26ec10d%7C0%7C0%7C638103606990259675%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=bfegGrEUTC%2FMuwIQFzv86Vb5DzXZDwsJegGGuIjbAKY%3D&reserved=0>.

I'm reaching out to inform you that we have created a new MapRoulette challenge in order to add Surface to ways in Ontario. To detect the issues in this challenge, we used Overpass Turbo to select Motorways where the Surface tag was not present.

You can find the challenge here: Canada - Add Surface to Highway - January 2023 - Ontario<https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmaproulette.org%2Fbrowse%2Fchallenges%2F37420&data=05%7C01%7Cdavid.salmon%40tomtom.com%7C80e35a13fd2c40e00d9f08daffd986e2%7C374f80267b544a3ab87d328fa26ec10d%7C0%7C0%7C638103606990259675%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=97UselFc%2FJIFlRcltF7s2%2BcDNGNJQWq%2Bn3zcCU1z%2FOM%3D&reserved=0>

In the description of the challenge you can find some additional information that will make it easier for you to solve the tasks.

Do not hesitate to contact me at david.salmon at tomtom.com<mailto:david.salmon at tomtom.com> to talk about possible collaborations, problems or challenges that you have detected. If you want to share them with us, we will be happy to explore how we can help.

In the meantime, happy editing!
_______________________________________________
Talk-ca mailing list
Talk-ca at openstreetmap.org<mailto:Talk-ca at openstreetmap.org>
https://lists.openstreetmap.org/listinfo/talk-ca<https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.openstreetmap.org%2Flistinfo%2Ftalk-ca&data=05%7C01%7Cdavid.salmon%40tomtom.com%7C80e35a13fd2c40e00d9f08daffd986e2%7C374f80267b544a3ab87d328fa26ec10d%7C0%7C0%7C638103606990259675%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=fXVztbGq%2F49jOMGZ8b%2Fi6WUpCvKvyIu6TrxeIkQ1y8o%3D&reserved=0>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/talk-ca/attachments/20230127/742bdf53/attachment.htm>