#406 - United Nations for Mali - WEST ANSONGO: roads, waterways and villages

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Unite Maps is a mapping initiative that aims to assist UN peacekeeping missions in their field endeavors, such as peace and security, navigation and logistics, by providing its peacekeepers with topographic maps that will help them in their tactical and operational activities.

Through this initiative, the Department of Operational Support (DOS) of the United Nations helps countries torn by conflict to create the necessary conditions for lasting peace.

Building upon previous initiatives in which the main objective was the production of topographic maps, the United Nations Global Service Centre (UNGSC), the United Nations Geospatial Information Section in New York, and three peacekeeping missions - UNSOS, MONUSCO and MINUSCA - established in August 2019 the foundation of this new and wider global initiative.

At the moment, Unite Maps is supporting the activities of 6 UN peacekeeping missions:

Unite Maps is providing OSM topographic data as an organised editing activity and we inform, contact and collaborate with all the local communities living and editing in the areas where we map too. Unite Maps provides data both editing with an internal mapping facility and crowdsourcing with a community of mappers, the UN Mappers.

UN Mappers is a thriving community ranging from UN personnel on the field (GIS groups, UN offices, military and police) to academia (highschools and universities), from local communities and NGOs to any remote volunteer in the world. In our wikipage, you can find all our TM projects, crowdsourced imports of UN data and editing guidelines, as well as the UN Mappers Leaderboard, with all our global, per-country and per-user editing statistics. Under the hood, we are preparing an amazing multi-language Moodle platform for trainings on OSM and a UN Mappers community website as well.

Don’t forget to follow our activities through our social media or send us an e-mail if you want to stay regularly updated on our mapping activities or to propose further engagements.

Created by SeverinGeo - Updated - Priority: low

  Instructions

Entities to Map
roads, streets, waterways, residential areas, places / routes, rues, cours d'eau, zones résidentielles, lieux
Changeset Comment
#llgtm-tache-406 #UNMappers #MINUSMA #Mali Added and/or modified topographic data
When saving your work, please leave the default comment but add what you actually mapped, for example "added buildings and a residential road".

General instructions

In this project we will map topographic data, supporting MINUSMA to ensure peace in Mali. The features to add are:

  • Roads

  • Waterways

  • Residential areas

  • Places

In order to contribute to this project, please remember to:

  • Use Maxar imagery. This imagery is often more recent and higher quality compared to others on our mapping areas.

  • Adjust imagery offset, if any. It may be possible to find already OSM data edited on other satellite imagery. Adjusting the satellite imagery offset is good practice. This link shows how to do it with JOSM and this other link show how to do it with iD.

  • Do not overextract. Especially in roads / rivers networks there may be many paths / streams in the imagery. You are not requested to map them all, and most of the times you can trace only the main ones as explaned here. As a general rule, keep in mind to map at 17-18-19 zoom scale levels for topographic data;

  • Check that #UNMappers is included in your changeset comment. This is mandatory to show up among our statistics and in the UN Mappers Leaderboard!

  • Add a exhaustive description of what you did in your changeset comment. This is one of the OSM good practices!

  • Close a task as ‘Mapped’ whenever all the features asked in this project are mapped. Other features are out of scope of this project. Feel free to validate!

  • Ask any mapping or validation question in the Questions and comments section in the project page. You will be able to interact with the Unite Maps team on mapping questions and possibly be useful to other mappers as well!

Roads

When mapping roads:

  • Focus on the road network: roads are not stand-alone features, and their classification most of the times depends on the classification of other roads near to it;

  • Classify roads according to their role in the network and (not only) depending on their width;

  • Use the Highway Tag Africa for any additional clarification.

The tags we are using most often to classify roads are:

Road class

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  • Secondary road (highway=secondary) : connected to a primary road, links large cities;

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  • Tertiary road (highway=tertiary) : connected to a secondary road, links towns;

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Those roads can go through settlements even though they are not residential ones.

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  • Residential road (highway=residential) (common) : roads for accessing and going within residential areas.

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  • Track (highway=track) (very common) : a motorized road, often unpaved, to reach agricultural and forestry areas;

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Road surface

Te would require you to specify surface characteristics of the road:

Waterways

For waterways, the same general rules for roads apply, as we are mapping a network.

  • Small intermittent streams may be disconnected

  • Flow direction is important when mapping rivers, trace waterways following it.

  • More information on how to map rivers.

The tags we are using most often to classify waterways are:

Waterway class

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  • Stream (waterway=stream) (common) : a naturally-forming waterway that is too narrow to be classed as river (the commonly accepted rule for OpenStreetMap is that a stream can be jumped across by an active, able-bodied person).

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Waterway intermittency

We would require you to specify whether the waterway is permanent or not. To decide, please compare with other satellite imagery (hopefully comparing dry and rainy season) to see whether the waterway is still there. Trace it anyway with Maxar imagery. The tags to specify this are:

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  • If a waterway is permanent, do not add any additional tag.

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Residential areas

Trace polygons around residential areas (big cities, towns, villages and settlments) and apply the tag landuse=residential:

  • Including all the buildings of an inhabited area;

  • It’s not requested to map buildings. Consider a task finished even if buildings are not mapped.

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Places

You can map places by adding a node in the center of a residential area.

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  • DO NOT delete any already existing information about places (including those nodes with tags as source and name;

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  • If you know the name of a village, add the tags name=name_of_the_village + source=survey or source=local_knowledge. Otherwise add only the node with the place tag;

  • Villages may move in other places or disappear, but it is better to maintain local toponymy. If you see a non-existing settlement with a place node, change it to place=locality, without removing any other additional information.

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The tags we are using most often to classify places are:

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  • place=isolated_dwelling (common) : smallest kind of settlement (1-2 households). Keep in mind that many huts in Africa don’t act as households;

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  • place=hamlet (common) : for settlments with (approximately) less than 200 inhabitants, between 2 and 20 households. Usually, an hamlet has not services like school, dispensary and alike.

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  • place=village : for settlements smaller than a town but with (approximately) between 200 and 10000 inhabitants and more than 20 households. Usually, a village has services like school, dispensary and alike.

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  • place=town : an important urban centre larger than a village but smaller than a city, with (approximately) more than 10,000 inhabitants.

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  Start contributing

Contributors Done Assigned