这个链接有完整的答案。 http://www.navitotal.com/forums/showthread.php?4614-About-Garmi Additions-files-(gmap3d-JCV-gmaptz-ASR-G2S) 总结一下 gmap3d.img -- 3D buildings, Copy to nuvi's \Garmin .JCV -- Lane Assistant files, put in \Garmin\JCV .JCV -- Junction view (JCV), To use the junction view files, drag the entire “JCV” folder into \Garmin\JCV or in \JCV on SD Card gmaptz.img -- Time zone map .ASR -- "SRX+ASR"/Voice recognition, Automatic Speech Recognition G2S & .db -- NüRoute technology & traffic Trends G2S Path: ".System\G2S" trafficTrends" files .db Path: ".System\SQLite"