Telenav/Mapping Projects/Europe/Bern
To make OpenStreetMap more navigable and accurate in guidance, our mapping team started an editing project in Europe.
In this project we will focus on editing oneways, turn restrictions, road geometry and also validating the existing map by correcting keep right errors in Bern, Switzerland.
V・T・E Bern, Switzerland   |
| latitude: 46.9548, longitude: 7.3948 |
| Browse map of Bern 46°57′17.28″ N, 7°23′41.28″ E |
| Edit map |
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External links:
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| Use this template for your locality |
Bern is a city in Switzerland at latitude 46°57′17.28″ North, longitude 7°23′41.28″ East.
Overall statistics
In the overall statistics for the city of Berlin, we have considered the following types of highway: motorway, trunk, primary, secondary, tertiary, unclassified, residential, living_street, service, track, road, ferry.
For each feature, our team has created some statistics:
| City | Road Geometry(km) | Road Name(km) | Oneway(km) | Speed Limit(km) | Lane Info(km) | Turn Restrictions | Signposts |
|---|---|---|---|---|---|---|---|
| Bern | 872.08 | 477.73 | 141.78 | 423.27 | 201.39 | 238 | 8 |
Goals
Improve OSM
For the cases to review, our team used the data from the ImproveOSM web site.
Oneways
How to map
We will follow the mapping scheme that is already used in Italy, as it is described on this page: https://wiki.openstreetmap.org/wiki/IT:Editing_Standards_and_Conventions.
NOTES
• Pay attention to the direction of the way! Before adding the oneway=yes tag, make sure that the direction of digitization matches the direction of the oneway. If not, press "R" to reverse the direction and only after adding the oneway=yes tag.
• For roundabouts, the oneway=yes is implied, so it is not necessary to add it explicitly.
See also:
• http://wiki.openstreetmap.org/wiki/Key:oneway
• http://wiki.openstreetmap.org/wiki/Tag:junction%3Droundabout
Cases to review
| City | Total cases |
|---|---|
| Bern | 10 |
Used dump
Turn Restrictions
How to map
We will follow the mapping scheme that is already used in Italy, as it is described on this page: https://wiki.openstreetmap.org/wiki/IT:Editing_Standards_and_Conventions
Tags to be used:
• relations: type=restriction ; restriction= * ; except= *
• relations: type=restriction ; restriction:conditional= * ; except= *
• members: from,to,via
See also:
• https://wiki.openstreetmap.org/wiki/Relation:restriction
Cases to review
| City | Cases to review |
|---|---|
| Bern | 134 |
Used dump
Road geometry
To improve the existing data, we will focus on adding missing roads from valid sources.
We will follow the mapping scheme that is already used from the community: https://wiki.openstreetmap.org/wiki/Key:highway
Quality assurance
Quality Assurance tools help lead to a better quality of OSM data.
Error Detecting Tools ( Integrity checks and Keep right) check the OSM data for potential data errors.
Integrity Checks
Telenav uses OSM Data Integrity Checks for issues that would impact the road network and tags that affect automotive navigation applications.
Integrity checks overview
| City | Severity | Error | Count |
|---|---|---|---|
| Bern | Critical | bad-2w-4w-tags | 182 |
| Critical | conditional-turn-restrictions | 1 | |
| Critical | invalid-turn-restrictions | 12 | |
| Critical | oneway-flip-flops | 3 | |
| Critical | pierced-tunnels-and-bridges | 5 | |
| Critical | road-islands | 4 | |
| Critical | unconnected-ways | 55 | |
| Critical | wrong-oneway-double-way | 30 | |
| Major | bad-tag-values | 4 | |
| Major | highway-tag-flip-flops | 2 | |
| Major | miscategorized-ramps | 1 | |
| Major | ramp-destination-conflicts | 3 | |
| Major | way-sign-posts | 40 | |
| Minor | lane-count | 6 | |
| Minor | links-with-name-or-ref | 116 | |
| Minor | roundabout-name | 9 | |
| Minor | smoothness-problems | 3 | |
| Minor | turn-lanes-order | 101 | |
| TOTAL | 577 | ||
Keep Right
Keep Right shows a large number of automatically detected potential errors on a map or in list form.It has a system for reporting false positives and for labeling a bug as fixed.
Keep right overview
| City | Severity | Error name | Cases |
|---|---|---|---|
| Bern | critical | via is not on the way ends | 1 |
| critical | dead-ended one-ways | 1 | |
| critical | missing to way | 4 | |
| critical | missing from way | 7 | |
| major | almost-junctions | 41 | |
| major | floating islands | 3 | |
| major | intersection without junction | 7 | |
| minor | mixed layers intersections | 11 | |
| Total | 75 | ||
Sources
• Aerial Imagery: Esri World Imagery, Bing Aerial Imagery, Mapbox Satellite, Maxar Imagery
• Street level imagery: OSC, Mapillary
• Improve OSM – Turn restriction
• Local Data - where there is approval to use it