On 03.01.2015 13:30, Emux wrote:
> AFAIK web and mobile maps use the Web Mercator (EPSG:3857)
> <http://en.wikipedia.org/wiki/Web_Mercator> projection for rendering
> their tiles.
>
> How you put information on top is something different and that is
> accomplished with the much easier to handle WGS84 (EPSG:4326)
> <http://en.wikipedia.org/wiki/World_Geodetic_System>.
> e.g. in Mapsforge (like in other map libs) you put overlays on the map
> using with lat, long coordinates.
>
> Also like Philip mentioned, for OSM geocoding you can use web services
> like Nominatim <http://wiki.openstreetmap.org/wiki/Nominatim> and/or
> Gisgraphy <http://www.gisgraphy.com/>.

There is also photon from komoot (based on nominatim) and pelias from mapzen
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