vector map library and writer

 Mapsforge project uses a compact file format for fast ad-hoc rendering of
 OpenStreetMap data. It provide tools to compile your own maps with detailed
 instructions and also precompiled maps. It provides simple boilerplate code
 to build applications that display OpenStreetMap-based maps. It provides a
 library to build standalone applications in Java.
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 Mapsforge maps can be flexibly styled with XML style files. It provide
 tools & library for POI search and also precompiled POI.