The same Dubai is sent 2 times from 2 different sources

[Zlitus]

Do you want to request a feature or report a bug?
Bug

What is the current behavior?
When I do this search with Algolia Places, I retrieve 2 times “Dubai” in the search results:

{
	"hitsPerPage": 5,
	"language": "fr",
	"type": "city",
	"query": "dubai"
}

The first one come apparently from geoNames and the other one from OSM, they have a different postal code. Seem like a duplication issue?

See a screenshot of the 2 results:

Thank you.

[JonathanMontane]

Hi, thanks for the report.
This issue is due to the fact that these two records of Dubai are more than 25km apart (literally 25.6km apart).
Since there are a lot of duplicates in OSM and in Geonames, we have rules in place to merge them, and one of them is that we combine records that have the same administrative field, share the same name and are within 25km of each other. The issue here is that we can't remove the distance rule, as many countries have homonyms within the same administrative field, but sufficiently far apart that it is not an issue. Additionally, we cannot rely on lower level administrative fields as they have a fairly high probability of being missing/incorrect, so we are using a heuristic that we found worked the best to merge the data, and this case falls right outside of our checks, unfortunately.

That being said, one of these two points is probably incorrect, and you can update the data in either OSM or Geonames with a more correct center point and the duplication issue will be resolved the next time we update the data.