From GSIM v1.0 Glossary

Survey Population

A Population for which information can be obtained in a survey.

A Population which can realistically be studied (example: people currently residing in the province of Ontario not in an institution nor in a remote northern location nor temporarily out of the province). The Survey Population is therefore often a subset of the Target Population

Synonyms: object class

Frame population

A Population represented by records in a frame, which is the observable part of a Target Population and provides a reasonable approximation to it.

Example: most recent population census frame 

Synonyms: object class