Talk:WikiProject Congo-Kinshasa

From OpenStreetMap Wiki
Jump to: navigation, search


Here an overview of the datasets available at RGC, an assessment of the quality, and the status:

Dataset Type Origin Quality Status Notes
Route vector GPS good done
Ancienne base questionable not advisable
Numerisation verification required sometimes useful with satellite images
Teledetection verification requires sometimes idential to exisiting data from Africover import
Pont point GPS, Numerisation, Teledetection ? useful?
Bac point GPS, Numerisation, Ancienne base ?
Aeroport point GPS good done
Ancienne cartes questionable not advisable
Numerisation ?
Gare point Ancienne base ?
Voie ferree vector Ancienne base ? already present?
Hydro lineaire vector Image satellite good done
Ancienne cartes questionable not advisable
Numerisation ?
Lac polygon Image satellite, Ancienne base ? already present
Port point GPS, Ancienne base ? Useful?
Hydro surfacique polygon Image satellite, Ancienne cartes ? partly already present
Axe navigable vector Image satellite, Ancienne base ? would need to translate into boat tag
Cascade point Ancienne base questionable not advisable not all points are on rivers
Localite point GPS good mostly done
Image satellite good done
Ancienne base questionable not advisable
Numerisation ?
Numerisation Atlas ?
Groupment point GPS, Ancienne base, Image satellite, Numerisation ? Useful?
Collectivite polygon Image satellite, Numerisation Saint Moulin ?
Territoire polygon Image satellite, Numerisation Saint Moulin ?
District polygon Image satellite, Numerisation Saint Moulin ? already present RGC data show more detail
Province polygon Image satellite, Numerisation Saint Moulin ? already present RGC data show more detail
Frontiere polygon unknown ? already present
Parc polygon GPS OK done
Ancienne base ? partly
Ecole point GPS OK done
Numerisation ?
Point eau point GPS ?
Structure sante point GPS, Numerisation, inconnue ?
Aire sante polygon Image satellite ? covers only parts of Kwilu
Courbe niveau vector Ancienne base coarse Not useful
Vegetation polygon Ancienne base very coarse Not useful

At RGC there are a lot of data, missing at OSM:

  • Collectivités
  • Districts
  • Groupements
  • Localités
  • Parcs
  • Territoires
  • Végétation
  • Ecoles
  • Points d'eau
  • Cascade
  • Port
  • Bacs
  • Gare
  • Pont

This could be uploaded with no or very little redundance

From this secnd group, there would be more redundance.

  • Axes navigables
  • Hydro Linéaires
  • Hydro surfacique
  • Lacs
  • Aéroport completed
  • Route
  • Voies ferrées

If someone is able to upload it, I would verfiy and consolidate railways in the whole country and if needed the other ones in the former Oriental province.

I tried to upload railway station or railway lines, but I failed every timesand the error messages where to poor for me that I could found a solution :-( I hope someone else has more experience than me. --Männedorf 11:59, 23 May 2010 (UTC)

I checked some possibilities for importing the data. Finally I found a way that looks reasonable to me. Here what I figured out for the Hydro Linéaires

  • Load data into QGIS
  • Split according to origin - everything besides image satellite is questionable in terms or accuracy
  • convert to OSM using Ogr2osm
  • Load into JOSM, download OSM data and compare with Bing maps - this last step basically is due to the fact that I'm not familiar with Merkaartor.

A first check at some random location showed that quite some of the data is not available yet.

Note: Today I finally got Ogr2osm to work. This simplifies the conversion to osm significantly. It also allows automatic translation of attributes into tags.

Any thoughts on this? --Ohr 17:52, 21 December 2010 (UTC)

I started importing the rivers from the Hydro lineaire dataset. First I am working on those with names given. I did some tracking of progress on the page Cours_d'eau. --Ohr 21:41, 23 December 2010 (UTC)

Today I also uploaded the missing airports. --Ohr 19:43, 3 January 2011 (UTC)

I had uploaded most Parks and other protected areas' borders that seemed accurate. I've added them to WikiProject Congo-Kinshasa/Aires protégées. I guess only National parks should have boundary=national_park while Domaine de chasse (Hunting reserves) and Réserve (Reserves) should have leisure=natural_reserve instead. There are some other proposed tags but they are not rendered at the moment. The Hydro lineaire set is pretty good for the Image satellite part. Many airports are from old maps, and old databases with only precision with degrees and minutes (no second) so error can be 2 km, if the original map isn't wrong to start with. We also don't know which landing strips are still usable, RGC doesn't seem to cary that information. Same precision error goes for villages and towns. I only import those if the satellite imagery shows there's a place there or close by, and depending on what other sources say (if the place is mentioned as being on a specific road, etc.). Most of the major roads from GPS tracks have been imported, as least RN. --Moyogo 16:00, 6 January 2011 (UTC)
So would you recommend to delete the airports again, that are not from GPS? Sounds to me like this would be better. --Ohr 16:46, 6 January 2011 (UTC)
Yeah, I would recommend only keeping those from GPS. There others from Ancienne base are rather unsure. I don't know how we can evaluate their accuracy or current status. --Moyogo 06:03, 7 January 2011 (UTC)
Ok, I will take care of it. But I guess it will take a few days to get it done. --Ohr 09:48, 7 January 2011 (UTC)
If you have the changeset number (6853643 (Visualise) apparently) it should be easier to revert automatically, see Change rollback or Revert scripts. ---Moyogo 21:26, 7 January 2011 (UTC)
The changeset 6853643 (Visualise) has been partially reverted successfully. Partially because the airports based on GPS were maintained to avoid deleting and importing again. I used JOSM Reverter Plugin for this. --Ohr 19:46, 9 January 2011 (UTC)

The following datasets have significant GPS-based parts so I think they are candidates for (selctive) import:

  • Route - Major roads are already present but smaller ones, tracks, and paths could be added. Translation into tags should be straighforward from attributes. GPS data done
  • Localite - probably only in conjunction with roads for ease of checking GPS data done - except Kinshasa
  • Pont - if at all only together with roads. Questionable as represented as nodes, not ways.

All would need manual verification before or during the import to avoid duplicates.

The following datasets are also candidates with a very little risk of collision. Here the translation of attributes into tags might need some discussion:

  • Point_eau
  • Ecole - including université and institut superieure
  • Structure_sante

The GPS-based data are mainly concentrated in Kwilu, North Kivu, and South Kivu. Especially in Kwilu is are very densly mapped area available.

Quick status update:
  • The Route data requires significant fixing as it contains loops and duplicate ways. For this reason the converstion with ogr2osm fails.
  • The translation from attributes into tags is already defined.
  • I have postponed Structure_sante until Key:healthcare is decided.
--Ohr 16:54, 21 January 2011 (UTC)
  • Route could be fixed with GRASS GIS (using break, rmdupl, and generalize)
  • import of roads is in progress - existing correspondig roads are either updated or replaced
--Ohr 19:20, 31 January 2011 (UTC)
All GPS based data from the Route dataset are finally imported (if not already present before). --Ohr 18:15, 15 February 2011 (UTC)

Tag "place" pour la RDC (proposition)

Toponymie (place)

Voir OSM_tags_for_routing sur l'interprétation de ces tags pour le routage (système de navigation).

Voir aussi la FAQ pour l'utilisation des areas et nodes pour décrire un endroit.

Key Value Element Comment Rendering Photo

Administratively declared places

place country Node République démocratique du Congo
place state Node Area Les 26 Provinces
place region Node Area District
place province Node Area See boundary=administrative, admin_level=* varies; may not be used in all countries.
place district Node Area See boundary=administrative, admin_level=* varies; may not be used in all countries.
place county Node Area Territoire
place municipality Node Area See boundary=administrative, admin_level=* varies; depending on the country a collection of arbitrary hamlets, villages and towns may form an administrative unit; sometimes members of a unit reform or join with another municipality as a result of political process. Within a municipality individual settlements are a lot less connected than those within a city, where they have grown connected over time.

Populated settlements, urban

place city Node Area Ville = 100 000 habitants ou plus ET capitales des 26 provinces[1]
place borough Node Area See boundary=administrative, depending on the country suburbs in larger cities are often grouped into administrative units called boroughs or city districts; using the value borough avoids name confusion in countries that declare districts within their states or counties.
place suburb Node Area Quartier d'une commune
place quarter Node Area A named part of a bigger settlement where this part is smaller than a suburb and bigger than a neighbourhood. This does not have to be an administrative entity.
The term quarter is sometimes used synonymously for neighbourhood.
place neighbourhood Node Area A named part of a place=village, a place=town or a place=city. Smaller than place=suburb and place=quarter.
The term quarter is sometimes used synonymously for neighbourhood, but may also stand for borough or suburb and hence is often avoided in OSM. See Wikipedia-16px.png Quarter_(urban_subdivision)
place city_block Node Area A named city block that is part of a place=city. See Wikipedia-16px.png City_block
place plot Node Area A named plot is a tract or parcel of land owned or meant to be owned by some owner.

Populated settlements, urban and rural

place town Node Area Communes d'une ville
Chef lieu d'un territoire
plus de 10 000 habitants
place village Node Area Village (moins de 10'000 habitants plus grand qu'un hameau; voir place=hamlet ci-dessous)
place hamlet Node Area Hameau (quelques maisons; population < 100 ?)
voir place=isolated_dwelling pour 1 à 2 maisons/familles et place=hamlet si d'avantage
place isolated_dwelling Node Area Smallest kind of human settlement. No more than 2 households.
place farm Node Area A farm that has its own name. If the farm is not a part of bigger settlement use place=isolated_dwelling. See also landuse=farmyard
place allotments Node Area Dacha or cottage settlement, which is located outside other inhabited locality. This value is used mainly in Russia and other countries of the former Soviet Union, where a lot of such unofficial settlements exist

Other places

place continent Node Area Continent: Afrique
place archipelago Relation Identifies the relation of an archipelago, which contains several islands and islets.
place island Area Île
place islet Node Area Identifies an islet (< 1 km2).
place square Node Area For a [W] square in a town (English: square, French: place, German: Platz, Italian: piazza, Spanish: plaza, Russian: площадь).
place locality Node Area Lieu-dit non habité
voir place=isolated_dwelling pour 1 à 2 maisons/familles et place=hamlet si d'avantage
place User Defined Node Area All commonly used values according to Taginfo

Additional attributes

population Number Node Area Nombre d'habitants. Cela peut servir à catégoriser la place (city,town, village) et/ou sélectionner les noms qui seront affichés sur tel niveau de zoom.
name Text Node Area To define the name of a place.
postal_code Text Node Way Area Code postal.
addr:postcode Text Node Way Area Some communities are using this tag on places, areas, street relations, according Karlsruhe Schema instead of 'postal_code' tag. This is not recommended, since it clashes with addressing.
reference_point yes Node Way Area Named landmarks used to identify locations (common in some countries).
is_in Text Node Way Area Pour une catégorisation - par exemple place=suburb; name=Yolo Sud; is_in=Kalamu,Kinshasa,

Son utilisation est de moins en moins utile mais tout le monde n'est pas d'accord. Faites votre choix

This section is a wiki template with a default description in English. Editable here.


À Kalamu et Nsele, les quartiers sont balisés avec suburb, à Kimbanseke avec locality. Vu les definitions de OSM, c'est plutôt suburb, par contre vu la manière comment suburb rendu (suburb à la même taille que la commune (town)). Je propose de change la proposition ci-dessus pour la RDC que locality est non seulement pour les lieux, mais encore pour les quartiers des communes. --Männedorf 08:23, 6 July 2010 (UTC)


  1. Loi organique n° 08/016 du 07 octobre 2008 portant composition, organisation et fonctionnement des Entités Territoriales Décentralisées et leurs rapports avec l’Etat et les Provinces, Art. 6 (c.f. Journal Officiel, n° spécial du 10 octobre 2008)

Boundaries of provinces and districts: RGC vs. Maplibrary

Hi! I have had a closer look at the boundaries of the provinces and districts provided by the RGC (shape files). I agree that they seem to be more detailed than the current data from ([1]). For example there are some villages in the Iye sector (according to “Ancienne base” data of the RGC), which is part of Tshopo, but according to the current OSM-data they would be in Tshuapa (these villages are not contained in OSM). Another example: Some villages of Pendjwa (Bandundu) would belong to Équateur according to OSM/Maplibrary. Maybe it would be a good idea to replace these boundaries using the data from RGC? Could anybody else have a close look at the data and provide a statement what she thinks about the quality/details? However, OSM seems to have more detailed frontiers of the RDC (this data is neither from the RGC nor from --Chricho (talk) 16:35, 25 July 2013 (UTC)

Most of the national borders are probably from the Large Scale Internation Boundaries dataset. The main problem when inserting the data from RGC might be the amount of work to combine existing data with the new ones and make sure not to break any relations. But in general if the current boundaries are the ones from Maplibrary any improvement would make sense to me. --Ohr (talk) 18:15, 25 July 2013 (UTC)
I have noticed that it was you who added the remark “RGC data show more detail”. So you seem to agree with that impression. How did you notice that? --Chricho (talk) 11:51, 26 July 2013 (UTC)

The country is called the Democratic Republic of Congo - République démocratique du Congo

There was a time when the name Congo-Kinshasa was used - in the 1950s. It was tried out again briefly when Laurent Kabila came to power - that was short-lived. Because the name is unknown in most of the world anyway, it is preferable to use the full name - which, incidentally, is the common name used throughout la République démocratique du Congo. Francish7 (talk) 18:35, 18 April 2014 (UTC)