Retrieving JSON information using Nominatim is somewhat satisfactory, but my preference lies more towards Map

Currently, I am utilizing the reverse geocoding mapbox webservice to retrieve addresses based on latitude and longitude coordinates.

When using mapbox (

http://api.tiles.mapbox.com/v3/mykey/geocode/{mylong},{mylat}.json
) with an Ajax callback function for obtaining JSON data, everything works smoothly.

However, when applying the same approach to openstreetmaps nominatim (

http://nominatim.openstreetmap.org/reverse?format=json&lat={mylat}&lon={mylong}
), I encounter a JavaScript error:

The requested resource does not have an 'Access-Control-Allow-Origin' header. Hence, access from the origin 'localhost' is restricted.

I wonder why the JSON data retrieval is successful in mapbox but not in nominatim. Although it doesn't seem related to the Access-Control-Allow-Origin parameter in Apache headers. If mapbox functions correctly, shouldn't nominatim work as well?

The reason I am exploring nominatim is due to its broader range of referenced coordinates.

Your assistance would be greatly appreciated.

Thank you,

Miguel

javascriptajaxjsonmapboxnominatim

Answer №1

If Mapbox is performing well, it doesn't necessarily mean Nominatim will work just as smoothly.

The assumption that Nominatim should work because Mapbox does is not entirely accurate. Both services use different geocoders and servers, with Nominatim lacking CORS support. To utilize Nominatim for this purpose, consider implementing JSONP instead.

Answer №2

Working with MapBox:

MapBox's response header includes Access-Control-Allow-Origin: *

However, the nominatim.openstreetmap.org may not have this, resulting in the message "Origin 'localhost' is therefore not allowed access"

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