I'm looking for a paid or free service that can return geographic points of interest within a given proximity (e.g. 10km) filtered by category, such as "Restaurants".
Factual looks promising, but doesn't support my country - South Africa. The Google Places API is still in developer preview.
There must be a mature online service that can act as an "online GPS" for finding nearby places?
GeoNames API returns geolocated Wikipedia articles located near given point:
http://www.geonames.org/export/wikipedia-webservice.html
SimpleGeo API returns info about given point
https://simplegeo.com/docs/api-endpoints/simplegeo-context
Here is a long list of mapping related APIs on Programmable Web. I'm sure it will give you more clues in regards to datasources:
http://www.programmableweb.com/apis/directory/1?apicat=Mapping
来源：https://stackoverflow.com/questions/4708704/web-service-to-find-nearby-points-of-interest