The Rules for Cadastral Survey require surveyors to carry out surveys in terms of one of 28 Transverse Mercator meridional circuits. The spatial extents of the circuits are shown in the figure below.

These boundaries are also available through the LINZ Data Service.

Click here for more information on the Rules for Cadastral Survey.

NZGD2000 Meridional Circuits
Click image to enlarge

The meridional circuits are formally defined in the LINZS25002 (Standard for New Zealand Geodetic Datum 2000 Projections). The key parameters from this standard are summarised below:

Name:See table below
Abbreviation:See table below
Projection type:Transverse Mercator
Reference ellipsoid:GRS80
Datum:NZGD2000
Origin latitude:See table below
Origin longitude / central meridan:See table below
False Northing:800,000 metres North
False Easting:400,000 metres East
Central meridian scale factor:See table below
Circuit nameAbbreviationOrigin latitudeOrigin longitudeCentral meridian
scale factor
Mount Eden 2000EDENTM200036° 52' 47" S174° 45' 51" E0.9999
Bay of Plenty 2000PLENTM200037° 45' 40" S176° 27' 58" E1.00000
Poverty Bay 2000POVETM200038° 37' 28" S177° 53' 08" E1.00000
Hawkes Bay 2000HAWKTM200039° 39' 03" S176° 40' 25" E1.00000
Taranaki 2000TARATM200039° 08' 08" S174° 13' 40" E1.00000
Tuhirangi 2000TUHITM200039° 30' 44" S175° 38' 24" E1.00000
Wanganui 2000WANGTM200040° 14' 31" S175° 29' 17" E1.00000
Wairarapa 2000WAIRTM200040° 55' 31" S175° 38' 50" E1.00000
Wellington 2000WELLTM200041° 18' 04" S174° 46' 35" E1.00000
Collingwood 2000COLLTM200040° 42' 53" S172° 40' 19" E1.00000
Nelson 2000NELSTM200041° 16' 28" S173° 17' 57" E1.00000
Karamea 2000KARATM200041° 17' 23" S172° 06' 32" E1.00000
Buller 2000BULLTM200041° 48' 38" S171° 34' 52" E1.00000
Grey 2000GREYTM200042° 20' 01" S171° 32' 59" E1.00000
Amuri 2000AMURTM200042° 41' 20" S173° 00' 36" E1.00000
Marlborough 2000MARLTM200041° 32' 40" S173° 48' 07" E1.00000
Hokitika 2000HOKITM200042° 53' 10" S170° 58' 47" E1.00000
Okarito 2000OKARTM200043° 06' 36" S170° 15' 39" E1.00000
Jacksons Bay 2000JACKTM200043° 58' 40" S168° 36' 22" E1.00000
Mount Pleasant 2000PLEATM200043° 35' 26" S172° 43' 37" E1.00000
Gawler 2000GAWLTM200043° 44' 55" S171° 21' 38" E1.00000
Timaru 2000TIMATM200044° 24' 07" S171° 03' 26" E1.00000
Lindis Peak 2000LINDTM200044° 44' 06" S169° 28' 03" E1.00000
Mount Nicholas 2000NICHTM200045° 07' 58" S168° 23' 55" E1.00000
Mount York 2000YORKTM200045° 33' 49" S167° 44' 19" E1.00000
Observation Point 2000OBSETM200045° 48' 58" S170° 37' 42" E1.00000
North Taieri 2000TAIETM200045° 51' 41" S170° 16' 57" E0.99996
Bluff 2000BLUFTM200046° 36' 00" S168° 20' 34" E1.00000