I am looking for sources of geo-referenced data on villages and cities (or all other things there are) in The Gambia (and Senegal if available). One issue with geocoding in rural West Afrika is the varying spelling of village names.
I own a (possibly incomplete) list of some 2000 Gambian village names, I was able to acquire some 1000 coordinates from HERE maps, Google maps, and MapQuest, through the respective APIs. But I estimate that this is missing roughly half of the villages in The Gambia. What is more. Some of these one thousand are rather bad/uncertain matches, so it would be good to compare with additional sources.
Are there any other sources, with a decent level of detail and fairly up-to-date?
Here is a list of villages that I was not able to find with any of the above sources. Since I know for sure where they are located I use those as a benchmark:
- Kulukulel (district: Fulladu East): 13°17'47.1"N 14°08'29.3"W
- Toubanding (district: Fulladu West): 13°28'03.7"N 14°41'09.6"W
- Sami Kuta (district: Upper Niumi): 13°23'43.9"N 16°19'19.5"W
(I am aware that some of these actually have labels with different spellings/entirely different names in google maps. However, this is so far of no help to me though, as these spellings mostly nowhere close to how the village names are usually spelled/pronounced)
Clarification in response to some comments: geonames for Gambia is in most cases rounded to minutes, which in the case of Gambia gives a grid in which places are as far as ~1.3kms, away from where they actually are. In the case of Gambian villages which are densely and rather uniformly distributed, this is not very helpful. If there are ways to obtain ungrounded geonames data I'd be happy.