Map Unit Identifier

Polygon identifier used to relate between the PAT and the CMP tables.

The MAPUNIT field was generated for each polygon by appending the PROVINCE and NSDB ID codes with the map unit symbol that identifed that polygon on the original printed soil map.  The MAPUNIT usually encodes meaningful information about the soil type and topography; the same information which is found in the CMP table. Within any one survey, a group of polygons with similar properties may be coded with the same MAPUNIT.