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<div class="moz-cite-prefix">AFAIK web and mobile maps use the <a
href="http://en.wikipedia.org/wiki/Web_Mercator">Web Mercator
(EPSG:3857)</a> projection for rendering their tiles.<br>
<br>
How you put information on top is something different and that is
accomplished with the much easier to handle <a
href="http://en.wikipedia.org/wiki/World_Geodetic_System">WGS84
(EPSG:4326)</a>.<br>
e.g. in Mapsforge (like in other map libs) you put overlays on the
map using with lat, long coordinates.<br>
<br>
Also like Philip mentioned, for OSM geocoding you can use web
services like <a
href="http://wiki.openstreetmap.org/wiki/Nominatim">Nominatim</a>
and/or <a href="http://www.gisgraphy.com/">Gisgraphy</a>.<br>
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<div class="moz-signature">-- <br>
<font color="#000000">Emux</font><br>
<a href="http://wiki.openstreetmap.org/wiki/Cruiser">Cruiser</a> -
<a
href="http://wiki.openstreetmap.org/wiki/Atlas_%28navigation_application%29">Atlas</a></div>
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