Answer by  
                                                                                          turkey98 (232)
                                                            
                          
                          
                                                          Latitude and Longitude are a way of marking the location of something on the earth. MPH is a measurement of speed. It's the number of miles an object would travel in one hour if it kept a constant speed. A GPS unit can give you your current location (lat and long) and your current speed (mph).