How to import API Maps into unreal

hello i search lot but not found anything on net or probably hidden somewhere here i m ok
i want to import basically into unreal engine with building generated and road generated
just like google, and bing they also providing API key which i do not know how to held it or import it please make guide to load maps from such sources . if someone too lazy to make guide fine tell in short better then nothing is something at least thanks

reply someone