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Czechia | Data Improvements

Open marjanvandekauter-tomtom opened this issue 3 years ago • 1 comments

Project description

Goal

To improve the map quality in Czechia, we propose to make data improvements by sharing challenges that can help fix data errors and improve the road network.

When appropriate, our team will also work on these challenges. If a challenge is more suitable to be solved without organised help, we will leave it for local users interested in completing the tasks. Challenges like this will be indicated as such in the overview below.

Additionally, we conduct edits based on map feedback.

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. We also strongly encourage you to take a look at the Czech editing standards and conventions on the OSM wiki.

Here is the current set of challenges.

Challenges

Active challenges

Click to expand.

  • Czechia - Inconsistent Layer Tagging on Highways This challenge focuses on updating layer tags for highway features such as bridges and tunnels. By correcting missing or mislabeled layer tags, we improve OSM data accuracy and support safer, more reliable routing for everyone.

  • Czechia - Intersecting and Spiky Buildings This challenge targets buildings (in Prague) that overlap or have sharp, or suspicious/ messy shapes. Fixing these helps make the map cleaner and easier to use for everyone.

    • Czechia - Fix Spiky Buildings This challenge targets buildings with potentially inaccurate geometry, specifically those featuring very sharp angles (less than 15 degrees between walls meeting at a node). While most building corners are near 90 degrees, these sharp angles often indicate mapping errors.

    • Fix Intersecting Buildings Identify and fix, if needed, situations where a building intersects with another building on the same level.

    • Czechia - Fix Duplicated Highways for potential review and fixes of overlapping highways that cause confusing navigation, visualization issues, and data processing errors. We identified highway segments that have overlapping geometry within a 0.5-meter buffer. Cases with correct level and layer information have been exclude

    • Fix Spiky Buildings

There are buildings with little spikes, weird angles so in result have incorrect shape to be fixed.

Objects without tags are undesirable in OpenStreetMap and should be either fixed by adding missing attributes or removed in case of duplicated or not existing objects.

Identify and fix, if needed, situations where a water feature intersects with a building.

This challenge enables you to add missing (mostly agricultural) land use areas where necessary.

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

Enhance the road network with crossings between railways and highways (= roads with any highway=* tag).

Identify and fix cases where two or more highways are connected to the same node on a roundabout. 

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

Identify and add if needed, one or more missing ways.

Identify and fix cases where the bridge or tunnel has an incorrect tag.

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

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.

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

The goal of this challenge is to identify and add missing surface tags on motorways and motorway links as they represent high speed roads, and it is desirable to accurately tag the surface for these highways.

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.

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 railway 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 22, 2023. We follow local guidelines and, if needed, consult with the community before making an update.

Geographical scope

Data improvements will be made across the whole country.

Announcements

This project was announced in the talk-cz 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 receive the hashtag #tomtom. Edits based on user feedback additionally have the hashtag #tt_mapfeedback. #tt is a hashtag that has been used for TomTom’s edits in the past.

Sources for editing

  • Local imagery
    • ScanEx IRS
  • Other imagery (used in case up-to-date local imagery is not available)
    • ESRI World Clarity (Beta)
    • Bing
    • Mapbox Imagery

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 09:06 marjanvandekauter-tomtom

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