#2608 - Missing Maps - Goma, DRC - Water and Sanitation - For intermediate mappers

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Only for intermediate mappers : JOSM users

  • Author : Missing Maps / CartONG
  • Requesting Organization : ICRC
  • Priority : Average
  • Imagery : Digital Globe

The inhabitants of Goma have been going through many crisis for the last 25 years. The genocide of Rwanda in 1994 destabilized the region, as well as many eruptions that followed and more recently the rebellion of the M23. The ICRC is helping the population to rebuild by supporting projects of water access and sanitation. This map will help define the directive plan of water access in Goma and build one in the extended city Keshero. Indeed, with the growth of the population from 200.000 inhabitants to 800.000 in 10 years, it is necessary to readapt the infrastructures. This map will be useful to determine the more relevant project and offer better hygiene conditions to the inhabitants.

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.

Through the MapGive project, the Humanitarian Information Unit (HIU) of the U.S. Department of State is providing the OpenStreetMap community access to updated satellite imagery services to help assist with humanitarian mapping.

Created by Violaine_Do - Updated - Priority: medium


Entities to Map
buildings, road network
Changeset Comment
#hotosm-project-2608 #Goma #DRC #MissingMaps #MapGive Source=GeoEye-1, WorldView-02, DigitalGlobe, NextView, 22 February 2017 & 28 February 2017
When saving your work, please leave the default comment but add what you actually mapped, for example "added buildings and a residential road".

[imagery url available only after accepting the license]

Access to this imagery is limited by the NextView license agreement.

You need to review and acknowledge the agreement.

The central area of the project was largely mapped using an outdated Bing imagery. Since the city has widely evolved in the meantime, feel free to deleted existing data (buildings in particular) if it no longer corresponds to the reality.

Informations on Imagery

This imagery is from Digital Globe’s GeoEye-1 and WorldView-2 satellites, and is made up imagery taken on February 22 (WV02) and February 28 (GE01). The imagery has been orthorectified for terrain corrected geographic precision. Additionally, the imagery has been contrast stretched using a custom stretch and processed into a Tiled Map Service (TMS) for performance.


To map the buildings, please use:

  • In the ID editor: label the area as “Building”, then correct for right angles with the “S” key

  • In JOSM: from the Tags/Memberships window, click “Add” and use the tag “building=yes”; then correct for right angles using the “Q” key

! : DO NOT STICK OTHER BUILDINGS OR ROADS Do not hesitate to delete buildings that are not anymore existing.

Road Network

You should'nt have to add many roads! If you see wrong located roads, don't hesitate to adjust it (if it's not in the axis of the road). In that case, if your road is extending outside of your square, please save your work regularly in order to avoid conflicts.

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.

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)

  • “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

Communication channel

Please join our communication channel for this project on either chat or conf call for help / support / comments !

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