Data Improvements in Madagascar

[awisemanapple]

Task Description

This task outlines work to improve map data in Madagascar. We plan to work on improving the road network, such as adding missing roads, fixing network issues such as missing connections or crossing roads, and other related issues. We also plan to update and correct coastline and water features as we find them, and correct and improve land use and land cover polygons where needed, such as airports, national parks, forests, colleges and universities, and so on -- remove duplicates, correct the boundaries, fix incorrect tags and other similar things.

Improvements that will be addressed include the following:

• Adding missing roads
• Correcting road connectivity issues
• Improving road classification consistency according to local and OSM guidelines
• Correcting coastline and water features
• Adding or correcting land use polygons
• Other one-off fixes

Mapping Guidelines

The team will follow OSM and local policy, along with any other guidelines as appropriate.

For water and coastlines, the team will follow OSM coastline guidelines, waterways policy such as water and natural=water and local policy along with any other policy as appropriate.

Some coastlines are connected to administrative boundaries, in which case we will adjust both if appropriate.

Where we see them, we will remove the source=PGS tag, which was from an earlier coastline import that needs to be cleaned up. We received a message on the India coastlines project requesting this, and it is commonly done in other coastline improvement edits.

The team will use the imagery and data sources specified below as needed for mapping in the country. When in doubt, the team will use the existing tags and data which are used locally. The history in JOSM (ctrl-H) identifies what previous mappers added and their notes and/or explanations regarding changes made. This history can also show if a previous mapper has visited that area or has expert knowledge or sources.

Our team uses the hashtag #adt (for Apple Data Team) for our edits.

Area of Focus

Throughout the country.

Tools

The team will use JOSM for completing the task. JOSM has validation warnings for road networks and other possible issues that are important to prevent improper changes.

Sources

• Maxar/DigitalGlobe Standard/Premium
• Bing imagery
• Mapbox imagery
• ESRI imagery
• HOT task imagery, if any
• Mapillary
• OpenStreetCam
• Pic4Carto
• Telenav's MissingRoads plugin and ImproveOSM
• Strava and OSM GPS traces

The team will apply image offsets as needed.

Changeset Comments

The team will provide changeset comments that are in compliance with OSM changeset guidelines.

Error Detection

The team will check for errors visually and using JOSM validation warnings prior to committing the changeset.

In addition, the team will review its work in accordance with validation guidelines such as the OSM Wiki and LearnOSM validation guidelines

Things you can do

If you'd like to help, here are a few ideas:

• Fix issues on MapRoulette
• Add missing road names that you know. Here is a tool to identify them
• Fix issues using OSM Inspector
• Let us know in the comments if there are areas with new construction or other issues

Contributors

• Data Team

For more information

Our community lead is Teddy Ahlvin and our editing leads are Jon Westlake and Erica Olson.
To get in touch with Teddy, you can email or contact him via OSM. (https://www.openstreetmap.org/user/LessThan3Nodes)
All of our leads can be reached via email.

OSM Wiki