OpenStreetMap

rivers of Gabon, Congo-Brazzaville and Cameroon

Posted by katpatuka on 27 September 2010 in English (English)

I don't know how many km rivers I added the last few days in Gabon, Congo-Brazzaville and Cameroon! (... and in other well-mapped corners of world un-emplyed micro-mappers start to map benches and gully covers...!)

Wikipedia is way behind in river decriptions too: no coordinates of river mouths, sometimes no names of affluents and tributaries (but the really huge main rivers)... Best sources for river names is still the UN (for example http://www.un.org/Depts/Cartographic/map/profile/gabon.pdf). Lots to do in Africa - I don't use potlatch for mapping there; josm with landsat has much higher resolution.

And - besides rivers - (nearly) no gpx-tracks to be found in the net! (...was just lucky with finding really good tracks of N2 road(s) in Gabon, Congo and Cameroon ;-)

Now look at some of these never heard river names:
Ogooué basin: Offoué, Ngounié, Mpassa, Ivindo,...
Ivindo basin: Djoua, Liboumba, Mvoung,...
Alima basin: Dziélé, Lékéti,...
Congo basin: Djoué, Sangha, Likouala, Léfini,...
Likouala basin: Mambili, Kouyou, Lékoli, Lengoue,...

...sort of project of the month for me... ;-)

Comment from Xapitoun on 29 September 2010 at 13:16

nice. I lived in Gabon a longtime ago and I wanted to map someparts of this country. But you're right, it is very complicated to find maps. I didn't knoe about landsat in JOSM. I will looking at...
Good Job.

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Comment from meannder on 30 September 2010 at 08:00

Wondering how this is done, mapping (a river, town, landuse, etc) without 'visiting' it...
Where to find some information about "landsat in josm"?

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Comment from katpatuka on 30 September 2010 at 08:12

Well, you'll have to download and activate the WMS plugin in josm - then you can choose the landsat imagery. To get an overview of an area zoom out to about 5km - to map small winding streams you'll have to zoom in down to around 300m...

Have a look at the possibilities of the Landsat layer(s) in josm by right-clicking on it...

Have a look at http://wiki.openstreetmap.org/wiki/JOSM/Plugins/WMSPlugin

;-)

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