Data Improvements in Bhutan

[awisemanapple]

Task Description

This task outlines work to improve map data in Bhutan. We plan to focus on improvements to the road network first, and later we may do some edits to other feature types if necessary, such as buildings, addresses, water, and land use and other related polygonal features. We will message the local community and get feedback and suggestions for this project.

We plan to do some improvements such as the following:

• Correcting road connectivity issues and network issues such as missing roads and alignment according to local and OSM guidelines
• Correcting inland water features
• Adding addresses
• Adding missing buildings and land use
• Other one-off fixes

Mapping Guidelines

For roads, the team will follow OSM and local highway policy, along with any other guidelines as appropriate.

For water features, 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 water features are connected to lower level subnational administrative boundaries. In that case we will adjust the boundary with the features. These are not country boundaries, but things like place, district and county.

The team will use imagery and data sources below as needed. 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.

Local mapper Kinganorbu suggested that some roads were missing and some need updated classifications.

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

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

The team will apply image offsets as needed.

Changeset Comments

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

Where needed, the team will tag corrections with review_requested=yes so the local community can double check them.

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.

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.

All of our leads can be reached via email.

OSM Wiki