When importing a generic Access MDB file, Global Mapper will prompt
you to select the columns that contain values for X/Easting/Longitude,
Y/Northing/Latitude, and, optionally, Z/Elevation, and import one feature
for each row in the table. If a specified column contains data that cannot
be converted into a valid coordinate value, that row will be skipped,
and, at the end of the import, the user will be notified of the number
of rows that could not be imported successfully.
The user will also need to select the projection to be used for the data. At this time the import process only supports point data.