#3322 - Teshie Nungua, Accra, Ghana - Buildings #AODC17

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  • Map Feature: Buildings Only
  • Imagery: Bing

This project is to trace buildings in Teshie Nungua as part of OpenStreetMap session during Africa Open Data Conference in Accra, Ghana. This project is easy for beginning mappers using the iD editor and also JOSM.

The aim of this task is to demonstrate the importance of Open Geo Data, how community engagement and Open Data can bring about innovation and development.

Trace all visible buildings.

Created by Enock4seth - Updated - Priority: medium


Entities to Map
Changeset Comment
Teshie Nungua, Accra, Ghana - #hotosm-project-3322 #AODC17
When saving your work, please leave the default comment but add what you actually mapped, for example "added buildings and a residential road".


  • Please accurately outline all the buildings you can find. The outline should be for the full size of the building even if it is partly covered by trees in the imagery.
  • Most buildings are rectangular, after drawing the outline, use the 's' key in the iD web editor to "square" the corners.
  • For circular buildings there is the 'o' key in the iD editor to create a circular structure.
  • Many buildings are very close, but do not actually touch each other, try to map them close to each other without letting them connect or share nodes with each other, roads or residential area outlines. In the iD web editor, holding down the "alt" key will keep nodes of "snapping" to each other and accidentally connecting.
  • In the iD web editor, the first time you map a building you will use the "Building Features" category and then at the top of the list select "Building" again, this is the most generic building tag we can use as we almost never can tell the more specific use of any building from imagery alone.

If you have personal knowledge of a building, please add that information to the building, like the name or type of building (hospital, school, gas station, etc)

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