Telenav/Mapping Projects/Europe/Turin

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 Turin, Italy.

V・T・E Torino, Piemonte, Italy

latitude: 45.0735, longitude: 7.6757

Browse map of Torino 45°04′24.60″ N, 7°40′32.52″ E

Edit map

Users in Torino GPS traces Geohack for OSM with more maps

External links: Notes Quality checks with Osmose Keep Right! OSM Inspector Streets without names CheckAutopista2 Public transport with öpnvkarte.de Wikipedia: en Wikimedia Commons OpenStreetMap contributors map Mapillary KartaView

Use this template for your locality

Torino is a city in Piemonte, Italy at latitude 45°04′24.60″ North, longitude 7°40′32.52″ East.

Overall statistics

In the overall statistics for the city of Turin, 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 Restriction	Signposts
Turin	2053.34	1756.68	1047.92	597.89	476.38	633	0

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:

• https://github.com/TelenavMapping/Telenav_mapping_team_practices_and_workflow/wiki/One-Way-Best-Practices

• http://wiki.openstreetmap.org/wiki/Key:oneway

• http://wiki.openstreetmap.org/wiki/Tag:junction%3Droundabout

Cases to review

City	Cases to review
Turin	35

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://github.com/TelenavMapping/Telenav_mapping_team_practices_and_workflow/wiki/Turn-Restrictions-Best-Practices

• https://wiki.openstreetmap.org/wiki/Relation:restriction

Cases to review

City	Cases to review
Turin	207

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 Name	Total
Turin	critical	bad-2w-4w-tags	16
	critical	invalid-turn-restrictions	33
	critical	pierced-tunnels-and-bridges	13
	critical	road-islands	17
	critical	unconnected-ways	13
	critical	wrong-oneway-double-way	34
	critical	wrong-one-ways	3
	major	bad-tag-values	70
	major	highway-tag-flip-flops	6
	major	miscategorized-ramps	11
	major	way-sign-posts	36
	minor	bad-words	69
	minor	lane-count	12
	minor	links-with-name-or-ref	166
	minor	misnamed-double-digitized-ways	13
	minor	roundabout-name	304
	minor	smoothness-problems	17
	minor	turn-lanes-order	22
	minor	typos	1
		Total	856

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	Total
Turin	critical	missing from way	1
	critical	missing to way	1
	critical	dead-ended one-ways	9
	major	intersection without junction	7
	major	floating islands	27
	major	almost-junctions	23
	minor	mixed layers intersections	35
	minor	already restricted by oneway	1
		Total	104

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

Interacting with community

• Mailing list:

1. https://lists.openstreetmap.org/listinfo/talk-it
2. https://lists.openstreetmap.org/listinfo/talk-it-piemonte