The internal structure of a data file is in binary code. A binary file cannot be edited with a text editor, but they are faster and more accurate in use. Binary files are automatically recognized irrespective of name or extension.
The file type can be one of the following:
A normal map file containing points, lines and texts.
Observations for detailed survey or traversing.
Raster file with transformation parameters.
Triangulation network of one surface including break lines. Can have separate areas and holes.
Reference lines - center lines and chainage distances.
One road/reference line in one file. Needed for cross section and profile calculations.
Cross sections for one or more surfaces along given ML-file.
Profiles for one or more surfaces along given ML-file.
Calculated from a terrain model.
One net in one file.
One or more bore holes in one file.
Can have several different sounding types.
Horizontal and vertical alignment, and pavement make-up.
One road in one file.
Road construction as break lines. Lines have surface code (layer) and feature codes.
Road lines in AB-coordinate system in other words section and offset instead of X and Y. Height can be Z (absolute) or H (relative to vertical alignment).