README.md

.map reader

general structure

 # meta data
 file header

 # sub-files
 for each sub-file   
    # tile index segment   
    tile index header   
    tile index entries    

    # tile data segment   
    for each tile       
        tile header       
        for each POI           
            POI data       
        for each way           
            way properties           
            way data

Detailview of mapfile

map file specification from the origin project mapsforge