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Croatia | Data Improvements

Open marjanvandekauter-tomtom opened this issue 3 years ago • 2 comments

Project description

Goal

To improve the map quality in Croatia, 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.

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.

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.

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.

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.

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).

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.

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

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.

Buildings with extremely sharp angles will be identified and corrected if needed.

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.

Identify and fix, if needed, cases where a way with tag highway=* intersects with a building.

Identify and fix if needed, cases where highway junctions are incorrectly or imprecisely mapped.

Identify and fix, if needed, situations where a building intersects with another building at the same layer.

Check the accuracy of the mapping of building shapes. If the shape does not match the sources (satellite and aerial imagery), changes/edits need to be made that lead to a proper representation of the building on the map.

Verify features of the area that are smaller than what would be expected for that type of area, such as parking lots, schools, universities, meadows, woods and much more.

Improve the OpenStreetMap data by validating and fixing objects without tags. 

Improve the OpenStreetMap data by validating and fixing situations where a water feature intersects with a building. 

Identify and fix, if needed, situations where a building intersects with another building at the same layer. 

Road Network challenges

Click to expand.

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.

Data analysis done by TomTom suggests that there should be a road or track here in OSM, but it is missing.

Missing feature challenges

Click to expand.

Identify and add if needed, a missing building or building information. In addition to that, you can add smaller buildings in the vicinity if you find them missing on the map.

Edits based on map feedback

Click to expand.

We 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 or correcting highways

    • Adding or correcting link roads

    • Adding or adjusting bridges, tunnels, layers, or relations

    • Adding or updating lanes and related properties

    • Adding or updating traffic signs

    • Adding or updating access barriers

    • Adding or updating turn restrictions

  • 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

  • Buildings

    • Adding buildings

    • Updating building type

    • Adjusting building shape

  • Water

    • Adding or realigning rivers, streams, and lakes.

  • Railways

    • Adding railway tracks

    • Realigning railways tracks

    • Adding or adjusting railway infrastructure tags such as bridges, tunnels, level crossings

  • Ferry Lines

    • Adding ferry Lines

    • Realigning ferry lines

    • Adding ferry terminals

These are incidental edits spread over time starting May 10, 2023. We follow local guidelines and, if needed, consult with the community before making an update.

Tasking Manager Projects

Click to expand.

We detected gaps in map of municipality of Opatija by visual check of data and comparing them to reference source materials representing reality. Project Objectives: Identify and map roads, buildings and other objects that are currently absent from the OpenStreetMap dataset.

Geographical scope

Data improvements will be made across the whole country.

Announcements

This project was announced in the Talk-hr 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

  • Esri
  • Bing
  • Geoportal DGU

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:

marjanvandekauter-tomtom avatar Jun 16 '22 11:06 marjanvandekauter-tomtom

Please do NOT use the imagery you said: Maxar, Esri, Bing

Use dgu.hr imagery which is official state aerial imagery and has better alignment than satellite imagery, and is done every 2 years.

hbogner avatar Jul 24 '23 07:07 hbogner

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

kiranahiretomtom avatar Oct 19 '23 07:10 kiranahiretomtom