Project Grids

Project grids provide a Universal Transverse Mercator (UTM) based standard for the interchange of data for engineering, surveying and mapping projects. Within a project grid, the distance between two points on a plan will be the same as the ground distance to a defined tolerance of 20 parts per million (ppm). This makes the project grids ideal for engineering applications, facilitating the use of plane coordinate calculations for design and construction set out.

A free MS Excel spreadsheet using Redfearn's formulae to convert between latitude & longitude and UTM coordinates and vice versa will allow for DIY conversions to any WA project grid and back again.

Albany (ALB)

Albany GDA94 (ALB94) AGD84 (ALB)
Central meridian 117°53'00" 117°55'00"
Central scale factor 1.00000440 1.000012
False easting 50 000.0 50 000.0
False northing 4 000 000.0 4 000 000.0
Extent NW corner S34°45'00" S34°50'00"

E117°33'00" E117°38'00"
Extent SE corner S35°12'00" S35°12'00"

E118°13'00" E118°13'00"
Height limit 190m 180m

Barrow Island - Onslow (BIO94)

Barrow Island - Onslow GDA94 (BIO94)
Central meridian 115°15'00"
Central scale factor 1.00000220
False easting 60 000.0
False northing 2 600 000.0
Extent NW corner S20°13'00"

E114°54'00"
Extent SE corner S22°12'00"

E115°35'00"
Height limit N/A

Broome (BRO)

Broome GDA94 (BRO94) AGD84 (BRO)
Central meridian 122°20'00" 122°20'00"
Central scale factor 1.00000298 1.000003
False easting 50 000.0 50 000.0
False northing 2 200 000.0 2 200 000.0
Extent NW corner S16°45'00" S17°43'00"

E122°05'00" E122°10'00"
Extent SE corner S18°05'00" S18°05'00"

E122°37'00" E122°37'00"
Height limit 130m N/A

Busselton (BCG)

Busselton GDA94 (BCG94) AGD84 (BCG)
Central meridian 115°26'00" 115°26'00"
Central scale factor 0.99999592 1.000007
False easting 50 000.0 50 000.0
False northing 3 900 000.0 3 900 000.0
Extent NW corner S33°24'00" S33°24'00"

E115°11'00" E115°11'00"
Extent SE corner S33°45'00" S33°45'00"

E115°52'00" E115°52'00"
Height limit 250m 200m

Carnarvon (CARN)

Carnarvon GDA94 (CARN94) AGD84 (CARN)
Central meridian 113°40'00" 113°40'00"
Central scale factor 0.99999796 1.000005
False easting 50 000.0 50 000.0
False northinq 2 950 000.0 3 050 000.0
Extent NW corner S23°00'00" S24°15'00"

E113°20'00" E113°20'00"
Extent SE corner  S25°30'00" S25°30'00"

E114°00'00" E114°00'00"
Height limit N/A N/A

Christmas Island (CIG)

Christmas Island GDA94 (CIG94) WGS84 (CIG92)
Central meridian 105°37'30" 105°37'30"
Central scale factor 1.00002514 1.000024
False easting 50 000.0 50 000.0
False northing 1 300 000.0 1 300 000.0
Extent NW corner S10°20'00" S10°20'00"

E105°30'00" E105°30'00"
Extent SE corner S10°40'00" S10°40'00"

E105°45'00" E105°45'00"
Height limit 290m 270m

Cocos (Keeling) Islands (CKIG)

Cocos (Keeling) Islands GDA94 (CKIG94) WGS84 (CKIG92)
Central meridian 96°52'30" 96°52'30"
Central scale factor 0.99999387 1.000000
False easting 50 000.0 50 000.0
False northing 1 500 000.0 1 400 000.0
Extent NW corner S11°45'00" S11°45'00"

E96°45'00" E96°45'00"
Extent SE corner S12°15'00" S12°15'00"

E97°00'00" E97°00'00"
Height limit N/A N/A

Collie (COL)

Collie GDA94 (COL94)
Central meridian 115°56'00"
Central scale factor 1.0000190
False easting 40 000.0
False northing 4 000 000.0
Extent NW corner S33°15'00"

E115°44'00"
Extent SE corner S34°40'00"

E116°24'00"
Height limit 50m to 310m

Esperance (ESP)

Esperance GDA94 (ESP) AGD84 (ESP)
Central meridian 121°53'00" 121°53'00"
Central scale factor 1.00000550 1.000012
False easting 50 000.0 50 000.0
False northing 3 950 000.0 3 950 000.0
Extent NW corner S33°20'00" S33°20'00"

E121°34'00" E121°40'00"
Extent SE corner S34°30'00" S34°00'00"

E122°12'00" E122°05'00"
Height limit N/A N.A

Exmouth (EXM)

Exmouth GDA94 (EXM94) AGD84 (EXM)
Central meridian 114°04'00" 114°04'00"
Central scale factor 1.00000236 1.000009
False easting 50 000.0 60 000.0
False northing 2 650 000.0 2 750 000.0
Extent NW corner S21°45'00" S21°45'00"

E113°45'00" E113°45'00"
Exrend SE corner S22°25'00" S22°25'00"

E114°15'00" E114°15'00"
Height limit 160m 170m

Geraldton (GCG)

Geraldton GDA94 (GCG) AGD84 (GCG)
Central meridian 114°35'00" 114°40'00"
Central scale factor 1.00000628 1.000016
False easting 50 000.0 50 000.0
False northing 3 350 000.0 3 350 000.0
Extent NW corner S28°29'00" S28°30'00"

E114°31'00" E114°31'00"
Extent SE corner S29°06'00" S29°06'00"

E115°00'00" E114°54'30"
Height limit 195m 200m

Goldfields (GOLD)

Goldfields GDA94 (GOLD94) AGD84 (GG)
Central meridian 121°30'00" 121°27'00"
Central scale factor 1.00004949 1.000057
False easting 60 000.0 60 000.0
False northing 3 700 000.0 4 000 000.0
Extent NW corner S28°45'00" S28°45'00"

E121°00'00" E121°00'00"
Extent SW corner S32°15'00" S31°30'00"

E121°50'00" E121°45'00"
Height limit N/A N/A

Jurien (JCG)

Jurien GDA94 (JCG94) AGD84 (JCG)
Central meridian 114°59'00" 114°59'00"
Central scale factor 1.00000314 1.000010
False easting 50 000.0 50 000.0
False northing 3 550 000.0 3 550 000.0
Extent NW corner S29°05'00" S29°05'00"

E114°50'00" E114°50'00"
Extent SE corner S30°44'00" S30°44'00"

E115°20'00" E115°20'00"
Height limit 200m 200m

Kalbarri (KALB)

Kalbarri GDA94 (KALB94)
Central meridian 114°18'55"
Central scale factor 1.00001400
False easting 55 000.0
False northing 3 600 000.0
Extent NW corner S27°10'00"

E113°54'00"
Extent SE corner S28°30'00"

E114°45'00"
Height limit N/A

Karratha (KAR)

Karratha GDA94 (KAR94) AGD84 (KAR)
Central meridian 116°56'00" 116°56'00"
Central scale factor 0.99999890 1.000004
False easting 50 000.0 50 000.0
False northing 2 450 000.0 2 450 000.0
Extent NW corner S20°15'00" S20°15'00"

E116°35'00" E116°35'00"
Extent SE corner S20°55'00" S20°55'00"

E117°15'00" E117°15'00"
Height limit N/A N/A

Kununurra (KUN)

Kununurra GDA94 (KUN94) AGD84 (KG)
Central meridian 128°45'00" 128°45'00"
Central scale factor 1.00001650 1.000014
False easting 50 000.0 50 000.0
False northing 2 000 000.0 2 000 000.0
Extent NW corner S14°45'00" S14°45'00"

E128°30'00" E128°30'00"
Extent SE corner S16°45'00" S16°45'00"

E129°00'00" E129°00'00"
Height limit 200m 200m

Lancelin (LCG)

Lancelin GDA94 (LCG94) AGD84 (LCG)
Central meridian 115°22'00" 115°22'00"
Central scale factor 1.00000157 1.000008
False easting 50 000.0 50 000.0
False northing 3 650 000.0 3 650 000.0
Extent NW corner S30°43'00" S30°43'00"

E115°09'00" E115°09'00"
Extent SE corner S31°29'00" S31°29'00"

E115°37'00" E115°37'00"
Height limit 200m 200m

Margaret River (MRCG)

Margaret River GDA94 (MRCG94) AGD84 (MRCG)
Central meridian 115°10'00" 115°06'00"
Central scale factor 1.00000550 1.000014
False easting 50 000.0 50 000.0
False northing 3 950 000.0 4 050 000.0
Extent NW corner S33°31'00" S33°31'00"

E114°58'00" E114°58'00"
Extent SE corner S34°25'00" S34°25'00"

E115°14'00" E115°14'00"
Height limit 200m 200m

Perth (PCG)

Perth GDA94 (PCG94) AGD84 (PCG)
Central meridian 115°49'00" 115°50'00"
Central scale factor 0.99999906 1.000006
False easting 50 000.0 40 000.0
False northing 3 800 000.0 3 800 000.0
Extent NW corner S31°20'00" S31°20'00"

E115°26'30" E115°26'30"
Extent SE corner S33°25'00" S33°25'00"

E116°05'00" E116°05'00"
Height limit 165m 130m

Port Hedland (PHG)

Port Hedland GDA94 (PHG94) AGD84 (PHG)
Central meridian 118°36'00" 118°35'00"
Central scale factor 1.00000135 1.000004
False easting 50 000.0 50 000.0
False northing 2 400 000.0 2 400 000.0
Extent NW corner S20°06'00" S20°07'00"

E118°15'00" E118°15'00"
Extent SE corner S20°47'00" S20°47'00"

E118°58'00" E118°55'00"
Height limit N/A N/A

Download the entire WA project grids spreadsheet (MS Excel)

Conversion tips

The MS Excel spreadsheet is Geocentric Datum of Australia 1994 (GDA94) ready.

  1. Create individual MS Excel spreadsheet for each step of your conversions.
  2. Replace TM definition false easting(m), false northing(m), central scale factor(k), zone width(degrees) and longitude of the central meridian of zone 1(Decimal degrees) with project grid parameters.
  3. Test data.
 S 31° 59' 26.97818" E 115° 53' 51.88593"
MGA94 zone50395873.024m easting6460050.365m northing
PCG9457662.206m easting259165.156m northing

This page was last updated on: 11 Aug 2016