Remaining work: Remaining days of surveying in each section
Remaining area: Remaining area to survey in square kilometres, calculated
in the system from values in Area and S44 Compliancy.
Planned start: Planned date for start of re-surveying.
Planned end: Planned date for end of re-surveying.
Actual start: Actual date for start of re-surveying. No Value means
that resurveying has not started.
Actual end: Actual date for end of re-surveying. No Value means
that resurveying is not finished.
Interval (years): Interval for re-survey.