Import/Catalogue/VIC Traffic Lights

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DTP VIC Traffic Lights Import is an import of DTP VIC Traffic Lights dataset. The import is currently in progress.

The import will happen through the MapRoulette Challenge at https://maproulette.org/challenge/38490

Goals

To identify and map missing traffic lights in Victoria.

Secondary goal to incorporate traffic light reference codes into OSM.

Schedule

March 2023

Import Data

Background

Data source site: https://discover.data.vic.gov.au/dataset/traffic-lights1
Data license: https://discover.data.vic.gov.au/dataset/traffic-lights1
Type of license (if applicable): CC BY 4.0
Link to permission (if required): https://wiki.openstreetmap.org/wiki/File:DTP_Waiver_signed.pdf
OSM attribution (if required): Contributors#Victorian Government data
ODbL Compliance verified: yes

OSM Data Files

https://tianjara.net/data/DTP_TrafficLights_MissingInOSM.osm

Import Type

One-time import through MapRoulette.

Data Preparation

Data Reduction & Simplification

n/a

Tagging Plans

Per the source data metadata at https://data.vicroads.vic.gov.au/metadata/traffic_lights.html, following tags are applied.

Site Type: POS (Pedestrian operated signals

Site Type: INT (Intersection)

The other site types are excluded.

The SITE_NO field is mapped to ref=*, which is displayed on the traffic signals box at each intersection.

Changeset Tags

source=VIC DTP Traffic Lights

Data Transformation

JOSM was used to convert the source GeoJSON into a .osm file with the tag changes described previously.

Data Transformation Results

https://tianjara.net/data/DTP_TrafficLights_20230320.osm

Data Merge Workflow

Team Approach

MapRoulette challenge anyone can contribute to.

References

n/a

Workflow

Mapper to cross reference with other sources such as satellite, aerial and ground level imagery, and where appropriate ensure the traffic lights are mapped. Done on a task by task basis through MapRoulette.

Traffic Signal Configuration Data Sheets (covered by the same waiver) may be used an another reference for checking the location and other details of the traffic lights. To make it easier to look these up they have been uploaded by User:Aharvey to https://data.tianjara.net/VIC_TrafficSignalDataSheets/0000.htm (replace 0000 with the signals reference code).

These were prepared with the aid of https://github.com/andrewharvey/VIC_TrafficSignalDataSheets_ToWeb

Conflation

Existing OSM data was loaded into JOSM via the Overpass query 

(highway=traffic_signals or (highway=crossing and crossing=traffic_signals)) in "VIC, AU"

JOSM Conflation plugin was configured with the DTP data as reference and OSM data as Subject.

  • Matching: Simple
  • Method: Disambiguating
  • Distance: Centroid < 50
  • Tags: none
  • Replace Geometry: no
  • Merge Tags: yes (all)

Reference only contained 738 traffic signals from the source dataset not found in OSM, these were exported from JOSM and converted to a challenge with: 

mr cooperative change --out DTP_TrafficLights_MissingInOSM.json DTP_TrafficLights_MissingInOSM.osm

QA

Mappers to cross check with imagery sources available.

See also

The email to the Imports and talk-au mailing list was sent on 2023-03-20.

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