#2782 - Missing maps: Tete, Mozambique (Archived)

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This project was archived.

A cholera epidemic affects the Mozambique since the beginning of the year. Several regions are concerned and even the capital Maputo knows many cases. The peak of the epidemic appears behind us, but the country remains an endemic area for cholera. Some places in the north and in the west are regularly faced with killing waves. Therefore, it is highly necessary to proceed to a substantive treatment of the epidemic.

Following the recommendation of the emergency team which had been sent to the field in early March, Doctors Without Borders / Médecins Sans Frontières (MSF) has taken the decision to launch a vaccination campaign of the population. Priority has been given to an intervention in the province of Tete in the north-west of the country, a region sandwiched between Zimbabwe, Zambia and Malawi.

This extensive operation requires a precise organization and will mobilize a few numbers of skills in terms of health promotion, logistics, medical and epidemiological follow-up, but also in terms of …GIS!

Given that a demographic information more detailed than the neighbourhood does not exist, we are going to create it! With the help of satellite images, you will constitute a geographical basis that will chart the dwellings of the city. By applying an average rate of occupancy in function of the neighbourhood and the morphology of the urban fabric, we will get a data on the densities of the city that we will link with the geography of the epidemic.

The Missing Maps project aims to map the most vulnerable places in the world (affected by humanitarian crises: disease epidemics, conflict, natural disasters, poverty, environmental crises). Building on HOT's disaster preparedness projects, the Missing Maps tasks facilitate pre-emptive mapping of priority countries to better facilitate disaster response, medical activities and resource allocation when crises occur.

Created by AtomicBohm - Updated - Priority: high


Entities to Map
buildings, road network
Changeset Comment
Tete, Mozambique #MissingMaps #buildings #roads #hotosm-project-2782
When saving your work, please leave the default comment but add what you actually mapped, for example "added buildings and a residential road".

Don't hesitate to split tasks if your area is too dense to map (especially in the urban area of Tete).


  • 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.

Road Network

Road network needs to be completed only if important roads are missing, don't waste time mapping unnecessary roads such as tracks or paths. Please keep in mind that this project is set up to answer the need of identifying buildings.

Roads should be identified with respect to their economic and social role, not in terms of their visibility/viability. The best way to approach this is to use the existing road network and its connections to towns and villages.

Tags that you could use :

  • highway=unclassified or "Minor routes" : for those roads connecting villages and hamlets

  • highway=residential: within residential zones (with the exception of major roads)

Tags that you shouldn't use :

  • highway=primary, highway=secondary or highway=tertiary : these are the main roads that connect towns. You shouldn’t need to create them for this project.
  • “highway=track” (roads or paths which connect fields only or leading to the river) and “highway=path”(roads too narrow for a 4-wheel drive vehicle to pass)

The most important thing is to maintain consistency in the network. Every road should connect to another of greater importance and not to isolated roads.

See the Wiki page Highway Africa Tag for more information on the cartography of route networks in Africa. For a concrete example, see the cartographic guide for route networks in S. Kivu

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