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Algeria | Data Improvements #126

Open marjanvandekauter-tomtom opened 2 years ago

marjanvandekauter-tomtom commented 2 years ago

Project description

Goal

To improve the map quality in Algeria, we propose to make data improvements by sharing challenges, and when appropriate, fixing data errors, and adding or editing certain kinds of geometry.

How to participate

Anyone is welcome to contribute to this project by participating in our MapRoulette challenges. Here is the extended documentation for using MR. Note that sometimes additional instructions are provided within the challenges.

Challenges

Quality check challenges

Click to expand. - [Invalid Lane Tag](https://maproulette.org/browse/challenges/19379) The tag lanes=* on ways with tag highway=* indicates the amount of lanes on the road at hand. The value for the lanes tag should be only one of the following numbers: 1, 1.5, 2, 3, 4, 5, 6, 7, 8, 9, 10. Any other value is incorrect and should be fixed. - [Not connected highway](https://maproulette.org/browse/challenges/19371) Ways with tag highway=* must be connected to the rest of the road network to ensure its continuity, e.g. for route planning. When such a way is not connected to another way with tag highway=*, an error is logged. - [Tag area=yes on object without feature type](https://maproulette.org/browse/challenges/19372) The area=yes tag is required for some closed ways when used to define a polygon. For closed ways with other tags, there is an assumption that the way defines an area. In some circumstances, a closed way may define both a closed polyline and an area. When tag area=yes is used, it is expected that one of the necessary accompanying tags is also found. - [Impossible angle in a highway](https://maproulette.org/browse/challenges/19375) In general, roads intended for vehicles should be built to maintain proper angles which ensure maneuvers and fluent traffic. Extreme, too sharp angles applied to a way may indicate errors in the road geometry. - [Invalid Turn Restriction](https://maproulette.org/browse/challenges/19377) This check identifies invalid turn restrictions. Invalid turn restrictions occur in a variety of ways, from invalid members to edge geometry issues to not being routable to wrong topology. Relations, ways and nodes in relations as well as turn restrictions are checked. A relation needs to have exactly one way with role 'from' and exactly one way with role 'to'. These ways should be linked together by at least one way with role 'via' OR with exactly one node with role 'via' (no more and no less). - [Invalid Mini-Roundabout](https://maproulette.org/browse/challenges/19380) Mini-roundabouts are a special kind of roundabout with the same rules as other roundabouts, but present as painted circles rather than physical circles. There might also be a low, fully traversable dome or island that vehicles can drive across. Road traffic flows in one direction around a point in the middle, and the traffic in the roundabout has right-of-way. A mini-roundabout is recorded using the tag highway=mini_roundabout. - [Polygon has self-intersection](https://maproulette.org/browse/challenges/19370) The necessary edits will be made to fix cases where the tag on a way indicates that the object is a polygon feature, but the way does not meet the definition of a closed way because it is self-intersecting, or ways in a relation with the same role form a self-intersecting polygon - [This multipolygon is a simple polygon](https://maproulette.org/browse/challenges/19374) Simple areas are mapped in OSM by creating a closed way and tagging it as an area object rather than a line. Relations of the type multipolygon are used to represent complex areas with holes inside or consisting of multiple disjoint areas. A multipolygon relation can have any number of ways in the role outer (the outline) and any number of ways in the role inner (the holes), and these must form valid rings to build a multipolygon. When a relation of the type multipolygon consists of only one member, which is a simple area, an error is logged. - [Spiky buildings](https://maproulette.org/browse/challenges/19376) Buildings with extremely sharp angles will be identified and corrected if needed. - [Polygon is not closed](https://maproulette.org/browse/challenges/19369) Features intended to be a polygon should be correctly tagged. When the tag indicates that the object should be a polygon, but the geometry is built out of a NON-closed way, an error is logged. - [Fix inconsistent highway intersections](https://maproulette.org/browse/challenges/39415) Identify and fix cases where highways intersect without a common node. - [Fix building and highway intersections](https://maproulette.org/browse/challenges/40244) Identify and fix, if needed, cases where a way with tag highway=* intersects with a building. - [Fix Intersecting Buildings](https://maproulette.org/browse/challenges/40710) Identify and fix, if needed, situations where a building intersects with another building at the same layer. - [Fix Incorrect Junctions on Roundabouts](https://maproulette.org/browse/challenges/42338) Identify and fix cases where two or more highways are connected to the same node on a roundabout.  - [Fix objects without tags](https://maproulette.org/browse/challenges/45147) Validate and fix objects without tags. Objects without tags are undesirable in OpenStreetMap and should be either fixed by adding missing attributes or removed in case of duplicated or not existing objects.

Geometry challenges

Click to expand. - [Missing Roads](https://maproulette.org/browse/challenges/21831) (regional challenge for Northern Africa) - [Missing Highways](https://maproulette.org/browse/challenges/38441) Data analysis done by TomTom suggests that there should be a road or track here in OSM, but it is missing. - [Isolated Roads](https://maproulette.org/browse/challenges/37930 ) Leads are generated based on analysis of road classes and their connection to the rest of the road network. the goal is to connect the hanging roads to the nearest road network based on the available imagery and/or probe sources.

Missing Highway Surface

Click to expand. - [Add Surface to Highway](https://maproulette.org/browse/challenges/37439) The goal of this challenge is to identify and add missing surface tags on a road network. We queried OSM for ways with certain highway=* values where the surface tag was missing.

Edits based on User Feedback

We will make improvements to OSM based on user feedback submitted for the TomTom map after comparing and ensuring that it is also valid for OSM. Here is a list of the types of edits to be made, provided they do not conflict with others’ edits and a local source is available: - Highways - Adding highways - Realigning highways - Adding or adjusting bridges, tunnels, layers, or relations - Updating lanes - Updating traffic signs - Addresses - Adding or correcting addresses - Updating the position of address nodes, usually when an object has multiple addresses - Adding or correcting names of ways - POIs (Points of Interest) - Adding POIs - Correcting POI locations - Adding or correcting POI information - Resolving POI-land use discrepancies - Handling POI closures - Land Use - Adding land use - Modifying existing land use extent - Adjusting building shape - Buildings - Adding buildings - Updating building type - Adjusting building shape - Water - Adding or realigning rivers, streams, and lakes.

Geographical scope

Data improvements will be made across the whole country.

Announcements

This project was announced in the Talk-africa mailing list:

TomTom organised editing

We will follow the Organised Editing Guidelines for this project. TomTom will not make any edits until two weeks after the project announcement. Here is our Organised Editing page, including a list of our editors.

How to find TomTom's edits

All edits made by our team have the hashtag #tt or #tomtom.

Sources for editing

For some OSM map edits TomTom editors will use proprietary sources for support. These will typically be in situations where there is not sufficient evidence using the available sources in OSM editors themselves. The proprietary sources will be ground-level imagery and GPS traces, both collected by TomTom's mobile mapping vans. On occasion, we will also use sources collected from a field survey by one of TomTom's sourcing specialists who have visited the location and collected data to support the required map updates.

How to reach out

If you have remarks about a specific edit of ours, please drop a comment in the changeset, and we will do our best to respond thoughtfully. Or, you can also:

matkoniecz commented 1 year ago

https://maproulette.org/browse/challenges/37439 which was linking here back via https://maproulette.org/browse/projects/50793 - found by looking at invalid surface values on motorways after encountering https://lists.openstreetmap.org/pipermail/talk-us/2023-February/021955.html

1) Are you planning on reviewing this edits for obvious mistakes like surface=ground added to motorway as result of that request?

2) What was point of that edits? Motorways can be assumed to have high-quality surfaces (for example StreetComplete is not even asking people about motorway surfaces if it is unset)

3) Why you asked mappers to edit surface in tunnels based on aerial data?

4) Maybe it would be better to spend time on more useful edits? Here effort/effects has really poor results, and effects may be negative as people will either add obviously true info or incorrect one.

(note: similar questions were asked also elsewhere, for example on talk-us and tagging mailing lists at least)

HajarElOuafi-TomTom commented 1 year ago

Hi @matkoniecz , First of all, I would like to thank you for your feedback! And please find below my answers to your questions:

  1. We are not reviewing the edits of the community, but we make sure that the instructions provided in the MapRoulette challenge are fair enough to avoid this kind of issues, and of course we keep active communication with the editors who have questions or concerns.
  2. We built this type of challenge after agreement with the african community as it's responding to the interest of the OpenStreetMap Operations team (who is responsible for the running of the core OSM server infrastructure) mentioned in https://twitter.com/OSM_Tech/status/1613681130829406209, and in the weeklyosm (in the Breaking news part) https://weeklyosm.eu/archives/16243 the OSM Africa community was mentioned to support. And in Africa the situation is a bit different than Europe, and not all motorways have high quality surfaces.
  3. We queried OSM for ways with certain highway=* values where the surface tag was missing. So the leads were prepared on a high level, and for the case of tunnel if the editor doesn’t have the local knowledge or no street level imagery are available, then he can skip the task or make it as “Too Hard” in MapRoulette.
  4. I believe the surface tag is also an important one, if we consider that it can be used for routing especially for the users of bicycles. I hope this answers your questions, and please do not hesitate to contact me if you still have comments or concerns.

Best regards, Hajar.

ghost commented 1 year ago

https://donate.openstreetmap.org 😄

kiranahiretomtom commented 8 months ago

The 'Sources for editing' section updated with the below information-

  1. Removed Maxar Premium Imagery from the list as it's not available anymore in OSM
  2. Added a description of proprietary sources to support editing