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Driveways being incorrectly modelled in South Australia #65

Open CloCkWeRX opened 3 years ago

CloCkWeRX commented 3 years ago

Example changesets: https://www.openstreetmap.org/changeset/106582910 https://www.openstreetmap.org/changeset/106588545 https://www.openstreetmap.org/changeset/106525754 https://www.openstreetmap.org/changeset/106688624

The majority of roads in South Australia are well modelled from both #4 and previous efforts to add the road dataset (https://wiki.openstreetmap.org/wiki/Import/South_Australian_Roads)

By modelling driveways as highway unclassified or highway residential; data consumers will default to assuming access=yes; where the access is more likely access=private or access=destination.

Public datasets like the ones used in the SA Roads import can be used to spot check what is actually a road, and what is private. Alternatively, tools like https://sappa.plan.sa.gov.au/ can be used as a cross check - I believe this is the same underlying data as the sa roads dataset.

From cursory investigation, a large number of different team members are mapping incorrectly for a high number of changesets.

CloCkWeRX commented 3 years ago

Folks, this effort seems over ~2000 changesets deep and ~5000+ ways.

https://overpass-turbo.eu/s/18DF https://overpass-turbo.eu/s/18DG

You need to put a stop to it, fix your instructions and come up with a plan to remediate the data.

herriotto commented 3 years ago

@CloCkWeRX Thanks for reaching out and looking into the edits from our team. We have currently halted any activity and are looking into the team edits. Please see our post on the talklist here, https://lists.openstreetmap.org/pipermail/talk-au/2021-June/014732.html.

Access and privacy are very important and taken very seriously when we add roads, so we will take a few days to investigate these instances.

https://sappa.plan.sa.gov.au/ is an interesting resource but I do not see it listed as a approved resource in the data catalogue in AU here, https://wiki.openstreetmap.org/wiki/Australian_data_catalogue. As per the 'Downloading data' drop down menu under the 'Getting help' section from https://sappa.plan.sa.gov.au/ located here, https://plan.sa.gov.au/our_planning_system/plan_sa/south_australian_property_and_planning_atlas, I see that "Many SAPPA layers are published as public data for download from Data SA (currently Phase 1 data only)." and that the Phase 2 and Phase 3 spatial data on the website that "will eventually be made available from Data.SA." We currently use the most recent roads dataset available here, https://data.sa.gov.au/data/dataset/roads, to avoid any possible conflict in terms of use from unpublished data.

Thanks again for getting in touch and we appreciate your patience while we while we look into this and will get back with a response promptly.

herriotto commented 3 years ago

Our team has reviewed all of the potential concerns raised here by @CloCkWeRX and updated the community on the talk-au list with the following:

Conclusion: We have to fix these 349 roads that provide connectivity and do not have any barrier tag. We can adjust their classification in the form of unclassified|residential > service + service=driveway (if/where applicable), but we cannot add any access=private|destination tags since we do not have ground truth.

The rest of the roads will not affect any routing engine since these are either deadends or have a barrier tag.

Thank you for raising this issue. We will try to prevent such situations in the future.

herriotto commented 3 years ago

The talk-au conversation can be followed here: https://lists.openstreetmap.org/pipermail/talk-au/2021-June/014738.html

herriotto commented 3 years ago

Hi all, This topic has picked back up on the talk-au list here, https://lists.openstreetmap.org/pipermail/talk-au/2021-October/015181.html, and we're revisiting these roads one by one updating as per the community feedback.