system
March 16, 2023, 10:52am
#1
Hi Greek Community!
I’m back to you with a new challenge. The topic is “edge crossing edge”, so where highways intersect without a common node.
You will find 76 tasks of this type in this challenge: MapRoulette
Our team will start working on this challenge in a couple of weeks. You can find more details about TomTom’s data improvement activities in Greece on our Github page:
opened 09:50AM - 28 Jul 22 UTC
maproulette
quality checks
greece
# Project description
## Goal
We propose to improve the map quality in Greece … by sharing challenges that can help fix data errors.
## How to participate
While our team will also work on them, we welcome anyone to contribute to this project by participating in its MapRoulette challenges. Here is the [extended documentation](https://learn.maproulette.org/documentation) for using MR. Note that sometimes additional instructions are provided within the challenges.
Here is the current [set of challenges](https://maproulette.org/browse/projects/48951).
## Challenges
### Quality check challenges
Click to expand.
- [Tag area=yes on object without feature type](https://maproulette.org/browse/challenges/28352)
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.
- [Polygon has self-intersection](https://maproulette.org/browse/challenges/28358)
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
- [Not connected highway](https://maproulette.org/browse/challenges/28350)
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.
- [Spiky buildings](https://maproulette.org/browse/challenges/28354)
Buildings with extremely sharp angles will be identified and corrected if needed.
- [This multipolygon is a simple polygon](https://maproulette.org/browse/challenges/28346)
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.
- [Impossible angle in a highway](https://maproulette.org/browse/challenges/28351)
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 Lane Tag](https://maproulette.org/browse/challenges/28355)
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.
- [Invalid Turn Restriction](https://maproulette.org/browse/challenges/28353)
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).
- [Polygon is not closed](https://maproulette.org/browse/challenges/28347)
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.
- [Edge crossing edge](https://maproulette.org/browse/challenges/38452)
Identify and fix cases where highways intersect without a common node.
### Missing Highway Surface
Click to expand.
- [Add Surface to Highway](https://maproulette.org/browse/challenges/37506)
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.
### Road network challenges
Click to expand.
- [Connect Isolated Highways](https://maproulette.org/browse/challenges/37951)
Identify and connect if needed cases where the end of the way with tag highway=* is not connected to the rest of the road network.
- [Add Missing Highways](https://maproulette.org/browse/challenges/37952)
Data analysis done by TomTom suggests that there should be a road or track here in OSM, but it is missing.
## Geographical scope
Data improvements will be made across the whole country.
## Announcements
This project was announced in [Greece OSM Forum](https://forum.openstreetmap.org/viewtopic.php?id=76078)
On January 2023 project was announced in new page [OpenStreetMap Community](https://community.openstreetmap.org/t/add-surface-to-highway-greece-jan-2023/8434)
On February 2023 project was announced in new page [OpenStreetMap Community](https://community.openstreetmap.org/t/connect-isolated-highways-greece/9162)
## TomTom Organised Editing
We will follow the [Organised Editing Guidelines](https://wiki.osmfoundation.org/wiki/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](https://wiki.openstreetmap.org/wiki/Organised_Editing/Activities/TomTom), 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
- Maxar
- Esri
- Bing
## 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:
- send a message to the project lead [Syed](https://www.openstreetmap.org/user/Syed_N) and [Chiara](https://www.openstreetmap.org/user/changio)
- join the conversation in [Greece OSM Forum](https://forum.openstreetmap.org/viewforum.php?id=27) and [OpenStreetMap Community](https://community.openstreetmap.org/t/add-surface-to-highway-greece-jan-2023/8434)
- email [osm@tomtom.com](mailto:osm@tomtom.com) for general questions about TomTom's activities.
I hope you will enjoy our challenges… and please let me know if you have any questions or specific mapping interest.
See you soon,
Chiara
Γεια σας Ελληνική Κοινότητα!
Επιστρέφω κοντά σας με μια νέα πρόκληση. Το θέμα είναι “άκρη που διασχίζει την άκρη”, δηλαδή εκεί όπου οι αυτοκινητόδρομοι τέμνονται χωρίς κοινό κόμβο.
Θα βρείτε 76 εργασίες αυτού του τύπου σε αυτήν την πρόκληση: MapRoulette
Η ομάδα μας θα αρχίσει να εργάζεται για αυτήν την πρόκληση σε μερικές εβδομάδες. Μπορείτε να βρείτε περισσότερες λεπτομέρειες σχετικά με τις δραστηριότητες βελτίωσης δεδομένων της TomTom στην Ελλάδα στη σελίδα μας στο Github:
opened 09:50AM - 28 Jul 22 UTC
maproulette
quality checks
greece
# Project description
## Goal
We propose to improve the map quality in Greece … by sharing challenges that can help fix data errors.
## How to participate
While our team will also work on them, we welcome anyone to contribute to this project by participating in its MapRoulette challenges. Here is the [extended documentation](https://learn.maproulette.org/documentation) for using MR. Note that sometimes additional instructions are provided within the challenges.
Here is the current [set of challenges](https://maproulette.org/browse/projects/48951).
## Challenges
### Quality check challenges
Click to expand.
- [Tag area=yes on object without feature type](https://maproulette.org/browse/challenges/28352)
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.
- [Polygon has self-intersection](https://maproulette.org/browse/challenges/28358)
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
- [Not connected highway](https://maproulette.org/browse/challenges/28350)
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.
- [Spiky buildings](https://maproulette.org/browse/challenges/28354)
Buildings with extremely sharp angles will be identified and corrected if needed.
- [This multipolygon is a simple polygon](https://maproulette.org/browse/challenges/28346)
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.
- [Impossible angle in a highway](https://maproulette.org/browse/challenges/28351)
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 Lane Tag](https://maproulette.org/browse/challenges/28355)
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.
- [Invalid Turn Restriction](https://maproulette.org/browse/challenges/28353)
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).
- [Polygon is not closed](https://maproulette.org/browse/challenges/28347)
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.
- [Edge crossing edge](https://maproulette.org/browse/challenges/38452)
Identify and fix cases where highways intersect without a common node.
### Missing Highway Surface
Click to expand.
- [Add Surface to Highway](https://maproulette.org/browse/challenges/37506)
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.
### Road network challenges
Click to expand.
- [Connect Isolated Highways](https://maproulette.org/browse/challenges/37951)
Identify and connect if needed cases where the end of the way with tag highway=* is not connected to the rest of the road network.
- [Add Missing Highways](https://maproulette.org/browse/challenges/37952)
Data analysis done by TomTom suggests that there should be a road or track here in OSM, but it is missing.
## Geographical scope
Data improvements will be made across the whole country.
## Announcements
This project was announced in [Greece OSM Forum](https://forum.openstreetmap.org/viewtopic.php?id=76078)
On January 2023 project was announced in new page [OpenStreetMap Community](https://community.openstreetmap.org/t/add-surface-to-highway-greece-jan-2023/8434)
On February 2023 project was announced in new page [OpenStreetMap Community](https://community.openstreetmap.org/t/connect-isolated-highways-greece/9162)
## TomTom Organised Editing
We will follow the [Organised Editing Guidelines](https://wiki.osmfoundation.org/wiki/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](https://wiki.openstreetmap.org/wiki/Organised_Editing/Activities/TomTom), 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
- Maxar
- Esri
- Bing
## 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:
- send a message to the project lead [Syed](https://www.openstreetmap.org/user/Syed_N) and [Chiara](https://www.openstreetmap.org/user/changio)
- join the conversation in [Greece OSM Forum](https://forum.openstreetmap.org/viewforum.php?id=27) and [OpenStreetMap Community](https://community.openstreetmap.org/t/add-surface-to-highway-greece-jan-2023/8434)
- email [osm@tomtom.com](mailto:osm@tomtom.com) for general questions about TomTom's activities.
Ελπίζω να απολαύσετε τις προκλήσεις μας… και παρακαλώ ενημερώστε με εάν έχετε οποιεσδήποτε ερωτήσεις ή συγκεκριμένο ενδιαφέρον χαρτογράφησης.
Τα λέμε σύντομα,
Chiara
1 post - 1 participant
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Ce sujet de discussion accompagne la publication sur https://community.openstreetmap.org/t/edge-crossing-edge-maproulette-challenge/96969