The NZGD2000 Meridional Circuit Boundaries as defined by LINZ. [The Rules for Cadastral Survey](http://www.linz.govt.nz/survey-titles/cadastral-surveying/publications/sg-rules/index.aspx) require surveyors to carry out surveys in terms of one of 28 Transverse Mercator meridional circuits.
The cos_id contained within this data is a reference to the Landonline coordinate system identifier For more information see crs_coordinate_system in the [Landonline BDE data dictionary documentation](http://www.linz.govt.nz/survey-titles/landonline-data/landonline-bde/bde-documentation)
Original data sourced from [here](http://www.linz.govt.nz/geodetic/datums-projections-heights/projections/nzgd2000-meridional-circuits/index.aspx)
These boundaries are based on past usage in cadastral surveys. These NZGD2000 boundaries have been adopted from NZGD49 circuits and have the same general geographic bounds.
Data is sourced from National Geodetic Office Database archives.