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Colombia | Data Improvements

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

Project description

Goal

To improve the map quality in Colombia, we propose to make data improvements by sharing challenges that can help fix data errors, and add certain kinds of features.

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.

How to participate

Anyone is welcome to contribute to this project by participating in our MapRoulette challenges. Here is the extended documentation for using MapRoulette. Note that sometimes additional instructions are provided within the challenges. We also strongly encourage you to make use of the resources listed in the OSM wiki section Colombia/Guide for mapping while you are editing.

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.

Geometry challenges

Click to expand.

  • Colombia - Sharp Angles on Highways Correct roads with unrealistically and odd sharp angles (less than 45 degrees).

  • Colombia - Fix Too Close Junctions This challenge focuses on identifying and resolving instances where road junctions are positioned too closely together. Specifically, we're targeting situations where the distance between adjacent junctions is less than 50 centimeters. These very short road segments often arise from roads being incorrectly joined to major routes, leading to unnecessary fragmentation and potentially incorrect network connectivity.

  • Colombia - Conectar Viales Aislados | Colombia - Connect Isolated Highways Its objective is to enhance the accuracy and reliability of global road networks. By identifying and fixing isolated highway segments, the routing and navigation for millions of users worldwide can improve.

  • Colombia - Fix Incorrect Junctions on Roundabouts This challenge helps identify and fix situations where multiple highways connect to the same point on a roundabout in OpenStreetMap.Fixing these errors improves routing for navigation apps that rely on OSM data. This means smoother and more accurate directions for drivers entering or exiting roundabouts in Colombia.

  • Colombia - Isolated Highways Leads are generated based on analysis of road classes and their connection to the rest of the road network. the goal is to connect the hanging roads to the nearest road network based on the available imagery and/or probe sources.

  • Colombia- Fix Inconsistent Highway Intersections (https://maproulette.org/browse/challenges/44538): Identify and fix cases where highways intersect without a common node.

Buildings

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  • Buildings This challenges is primarily focused on missing buildings of all types (residential, commercial, industrial…etc.) to be mapped as highlighted. Our team compared TomTom and OSM data using spatial comparisons including intersections and overlaps indexes, we have detected some areas where buildings are missing in OSM; to increase confidence level, the team compared a sample area and conducted analysis to validate some missing buildings. The missing areas can be added by editing several buildings or individual ones; the choice will depend on reality checks and local knowledge. As you may know, you are required to use the most updated satellite and aerial imageries on the background while editing.

Building and Water Intersections

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  • Colombia - Fix Building and Water Intersections Our team discovered instances where a water feature intersects with a building during a spatial analysis of water features and buildings available in OSM. The objective of this challenge is to identify and rectify, if necessary, situations where a water feature intersects with a building using reliable sources to ensure accurate map and data representation. As with any spatial analysis, there might be some false positives. In such cases, we kindly request you to mark the task as ‘Not an issue’ if you find that the task instructions are invalid based on your knowledge.

Inconsistent tagging

Click to expand.
  • Colombia - Fix Inconsistent Bridge and Tunnel Tagging Following the guidelines outlined in the OSM Wiki, we have developed a process to identify cases where bridges and tunnels have been inconsistently tagged. Our goal is to draw your attention to these issues and provide an opportunity for the community to improve this feature.

Edits based on map feedback

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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 highways

    • Realigning highways

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

    • Updating lanes

    • Updating traffic signs

  • 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.

These are incidental edits spread over time starting July 17th, 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

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 World Imagery
  • Bing Maps Aerial

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