Project Grids

Project grids  provide a Transverse Mercator (TM) 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 GDA2020 (ALB2020) GDA94 (ALB94) AGD84 (ALB)
Central meridian 117°53'00"117°53'00" 117°55'00"
Central scale factor 1.00000440 1.00000440 1.000012
False easting 50 000.0 50 000.0 50 000.0
False northing 4 100 000.0 4 000 000.0 4 000 000.0
Extent NW corner S34°45'00 S34°45'00" S34°50'00"
 E117°33'00" E117°33'00" E117°38'00"
Extent SE corner S35°12'00" S35°12'00" S35°12'00"
 E118°13'00" E118°13'00" E118°13'00"
Height limit 190m 190m 180m

Barrow Island - Onslow (BIO)

Barrow Island - Onslow GDA2020 (BIO2020) GDA94 (BIO94)
Central meridian 115°15'00" 115°15'00"  
Central scale factor 1.00000220 1.00000220  
False easting 60 000.0 60 000.0  
False northing 2 700 000.0 2 600 000.0  
Extent NW corner S20°13'00" S20°13'00"  
 E114°54'00" E114°54'00"  
Extent SE corner S22°12'00" S22°12'00"  
 E115°35'00" E115°35'00"  
Height limit N/A N/A  

Broome (BRO)

Broome GDA2020 (BRO2020) GDA94 (BRO94) AGD84 (BRO)
Central meridian 122°20'00" 122°20'00" 122°20'00"
Central scale factor 1.00000298 1.00000298 1.000003
False easting 50 000.0 50 000.0 50 000.0
False northing 2 300 000.0 2 200 000.0 2 200 000.0
Extent NW corner S16°45'00" S16°45'00" S17°43'00"
 E122°05'00" E122°05'00" E122°10'00"
Extent SE corner S18°05'00" S18°05'00" S18°05'00"
 E122°37'00" E122°37'00" E122°37'00"
Height limit 130m 130m N/A

Busselton (BCG)

Busselton GDA2020 (BCG2020) GDA94 (BCG94) AGD84 (BCG)
Central meridian 115°26'00" 115°26'00" 115°26'00"
Central scale factor 0.99999592 0.99999592 1.000007
False easting 50 000.0 50 000.0 50 000.0
False northing 4 000 000.0 3 900 000.0 3 900 000.0
Extent NW corner S33°24'00" S33°24'00" S33°24'00"
 E115°11'00" E115°11'00" E115°11'00"
Extent SE corner S33°45'00" S33°45'00" S33°45'00"
 E115°52'00" E115°52'00" E115°52'00"
Height limit 250m 250m 200m

Carnarvon (CARN)

Carnarvon GDA2020 (CARN2020) GDA94 (CARN94) AGD84 (CARN)
Central meridian 113°40'00" 113°40'00" 113°40'00"
Central scale factor 0.99999796 0.99999796 1.000005
False easting 50 000.0 50 000.0 50 000.0
False northinq 3 050 000.0 2 950 000.0 3 050 000.0
Extent NW corner S23°00'00" S23°00'00" S24°15'00"
 E113°20'00" E113°20'00" E113°20'00"
Extent SE corner  S25°30'00" S25°30'00" S25°30'00"
 E114°00'00" E114°00'00" E114°00'00"
Height limit N/A N/A N/A

Christmas Island (CIG)

Christmas Island GDA2020 (CIG2020) GDA94 (CIG94) WGS84 (CIG92)
Central meridian 105°37'30" 105°37'30" 105°37'30"
Central scale factor 1.00002514 1.00002514 1.000024
False easting 50 000.0 50 000.0 50 000.0
False northing 1 400 000.0 1 300 000.0 1 300 000.0
Extent NW corner S10°20'00" S10°20'00" S10°20'00"
 E105°30'00" E105°30'00" E105°30'00"
Extent SE corner S10°40'00" S10°40'00" S10°40'00"
 E105°45'00" E105°45'00" E105°45'00"
Height limit 290m 290m 270m

Cocos (Keeling) Islands (CKIG)

Cocos (Keeling) Islands GDA2020 (CKIG2020) GDA94 (CKIG94) WGS84 (CKIG92)
Central meridian 96°52'30" 96°52'30" 96°52'30"
Central scale factor 0.99999387 0.99999387 1.000000
False easting 50 000.0 50 000.0 50 000.0
False northing 1 600 000.0 1 500 000.0 1 400 000.0
Extent NW corner S11°45'00" S11°45'00" S11°45'00"
 E96°45'00" E96°45'00" E96°45'00"
Extent SE corner S12°15'00" S12°15'00" S12°15'00"
 E97°00'00" E97°00'00" E97°00'00"
Height limit N/A N/A N/A

Collie (COL)

Collie GDA2020 (COL2020) GDA94 (COL94)
Central meridian 115°56'00" 115°56'00"  
Central scale factor 1.0000190 1.0000190  
False easting 40 000.0 40 000.0  
False northing 4 100 000.0 4 000 000.0  
Extent NW corner S33°15'00" S33°15'00"  
 E115°44'00" E115°44'00"  
Extent SE corner S34°40'00" S34°40'00"  
 E116°24'00" E116°24'00"  
Height limit 50m to 310m 50m to 310m  

Esperance (ESP)

Esperance GDA2020 (ESP2020) GDA94 (ESP94) AGD84 (ESP)
Central meridian 121°53'00" 121°53'00" 121°53'00"
Central scale factor 1.00000550 1.00000550 1.000012
False easting 50 000.0 50 000.0 50 000.0
False northing 4 050 000.0 3 950 000.0 3 950 000.0
Extent NW corner S33°20'00" S33°20'00" S33°20'00"
 E121°34'00" E121°34'00" E121°40'00"
Extent SE corner S34°30'00" S34°30'00" S34°00'00"
 E122°12'00" E122°12'00" E122°05'00"
Height limit N/A N/A N.A

Exmouth (EXM)

Exmouth GDA2020 (EXM2020) GDA94 (EXM94) AGD84 (EXM)
Central meridian 114°04'00" 114°04'00" 114°04'00"
Central scale factor 1.00000236 1.00000236 1.000009
False easting 50 000.0 50 000.0 60 000.0
False northing 2 750 000.0 2 650 000.0 2 750 000.0
Extent NW corner S21°45'00" S21°45'00" S21°45'00"
 E113°45'00" E113°45'00" E113°45'00"
Extent SE corner S22°25'00" S22°25'00" S22°25'00"
 E114°15'00" E114°15'00" E114°15'00"
Height limit 160m 160m 170m

Geraldton (GCG)

Geraldton GDA2020 (GCG2020) GDA94 (GCG94) AGD84 (GCG)
Central meridian 114°35'00" 114°35'00" 114°40'00"
Central scale factor 1.00000628 1.00000628 1.000016
False easting 50 000.0 50 000.0 50 000.0
False northing 3 450 000.0 3 350 000.0 3 350 000.0
Extent NW corner S28°29'00" S28°29'00" S28°30'00"
 E114°31'00" E114°31'00" E114°31'00"
Extent SE corner S29°06'00" S29°06'00" S29°06'00"
 E115°00'00" E115°00'00" E114°54'30"
Height limit 195m 195m 200m

Goldfields (GOLD)

Goldfields GDA2020 (GOLD2020) GDA94 (GOLD94) AGD84 (GG)
Central meridian 121°30'00" 121°30'00" 121°27'00"
Central scale factor 1.00004949 1.00004949 1.000057
False easting 60 000.0 60 000.0 60 000.0
False northing 3 800 000.0 3 700 000.0 4 000 000.0
Extent NW corner S28°45'00" S28°45'00" S28°45'00"
 E121°00'00" E121°00'00" E121°00'00"
Extent SE corner S32°15'00" S32°15'00" S31°30'00"
 E121°50'00" E121°50'00" E121°45'00"
Height limit N/A N/A N/A

Jurien (JCG)

Jurien GDA2020 (JCG2020) GDA94 (JCG94) AGD84 (JCG)
Central meridian 114°59'00" 114°59'00" 114°59'00"
Central scale factor 1.00000314 1.00000314 1.000010
False easting 50 000.0 50 000.0 50 000.0
False northing 3 650 000.0 3 550 000.0 3 550 000.0
Extent NW corner S29°05'00" S29°05'00" S29°05'00"
 E114°50'00" E114°50'00" E114°50'00"
Extent SE corner S30°44'00" S30°44'00" S30°44'00"
 E115°20'00" E115°20'00" E115°20'00"
Height limit 200m 200m 200m

Kalbarri (KALB)

Kalbarri GDA2020 (KALB2020) GDA94 (KALB94)
Central meridian 114°18'55" 114°18'55"  
Central scale factor 1.00001400 1.00001400  
False easting 55 000.0 55 000.0  
False northing 3 700 000.0 3 600 000.0  
Extent NW corner S27°10'00" S27°10'00"  
 E113°54'00" E113°54'00"  
Extent SE corner S28°30'00" S28°30'00"  
 E114°45'00" E114°45'00"  
Height limit N/A N/A  

Karratha (KAR)

Karratha GDA2020 (KAR2020) GDA94 (KAR94) AGD84 (KAR)
Central meridian 116°56'00" 116°56'00" 116°56'00"
Central scale factor 0.99999890 0.99999890 1.000004
False easting 50 000.0 50 000.0 50 000.0
False northing 2 550 000.0 2 450 000.0 2 450 000.0
Extent NW corner S20°15'00" S20°15'00" S20°15'00"
 E116°35'00" E116°35'00" E116°35'00"
Extent SE corner S20°55'00" S20°55'00" S20°55'00"
 E117°15'00" E117°15'00" E117°15'00"
Height limit N/A N/A N/A

Kununurra (KUN)

Kununurra GDA2020 (KUN2020) GDA94 (KUN94) AGD84 (KG)
Central meridian 128°45'00" 128°45'00" 128°45'00"
Central scale factor 1.00001650 1.00001650 1.000014
False easting 50 000.0 50 000.0 50 000.0
False northing 2 100 000.0 2 000 000.0 2 000 000.0
Extent NW corner S14°45'00" S14°45'00" S14°45'00"
 E128°30'00" E128°30'00" E128°30'00"
Extent SE corner S16°45'00" S16°45'00" S16°45'00"
 E129°00'00" E129°00'00" E129°00'00"
Height limit 200m 200m 200m

Lancelin (LCG)

Lancelin GDA2020 (LCG2020) GDA94 (LCG94) AGD84 (LCG)
Central meridian 115°22'00" 115°22'00" 115°22'00"
Central scale factor 1.00000157 1.00000157 1.000008
False easting 50 000.0 50 000.0 50 000.0
False northing 3 750 000.0 3 650 000.0 3 650 000.0
Extent NW corner S30°43'00" S30°43'00" S30°43'00"
 E115°09'00" E115°09'00" E115°09'00"
Extent SE corner S31°29'00" S31°29'00" S31°29'00"
 E115°37'00" E115°37'00" E115°37'00"
Height limit 200m 200m 200m

Margaret River (MRCG)

Margaret River GDA2020 (MRCG2020) GDA94 (MRCG94) AGD84 (MRCG)
Central meridian 115°10'00" 115°10'00" 115°06'00"
Central scale factor 1.00000550 1.00000550 1.000014
False easting 50 000.0 50 000.0 50 000.0
False northing 4 050 000.0 3 950 000.0 4 050 000.0
Extent NW corner S33°31'00" S33°31'00" S33°31'00"
 E114°58'00" E114°58'00" E114°58'00"
Extent SE corner S34°25'00" S34°25'00" S34°25'00"
 E115°14'00" E115°14'00" E115°14'00"
Height limit 200m 200m 200m

Perth (PCG)

Perth GDA2020 (PCG2020) GDA94 (PCG94) AGD84 (PCG)
Central meridian 115°49'00" 115°49'00" 115°50'00"
Central scale factor 0.99999906 0.99999906 1.000006
False easting 50 000.0 50 000.0 40 000.0
False northing 3 900 000.0 3 800 000.0 3 800 000.0
Extent NW corner S31°20'00" S31°20'00" S31°20'00"
 E115°26'30" E115°26'30" E115°26'30"
Extent SE corner S33°25'00" S33°25'00" S33°25'00"
 E116°05'00" E116°05'00" E116°05'00"
Height limit 165m 165m 130m

Port Hedland (PHG)

Port Hedland GDA2020 (PHG2020) GDA94 (PHG94) AGD84 (PHG)
Central meridian 118°36'00" 118°36'00" 118°35'00"
Central scale factor 1.00000135 1.00000135 1.000004
False easting 50 000.0 50 000.0 50 000.0
False northing 2 500 000.0 2 400 000.0 2 400 000.0
Extent NW corner S20°06'00" S20°06'00" S20°07'00"
 E118°15'00" E118°15'00" E118°15'00"
Extent SE corner S20°47'00" S20°47'00" S20°47'00"
 E118°58'00" E118°58'00" E118°55'00"
Height limit N/A N/A N/A

Conversion tools

Download the entire WA project grids spreadsheet [Excel 0.1MB]

Download the Geodetic calculator spreadsheet [Excel 0.1MB].

Note - The Geodetic Calculator spreadsheet contains Macro's that must be enabled. The code is not locked and can be used without restriction. Users should verify results before use.

This page was last updated on: 21 Feb 2017