Map Projections

Commonly Used Projections in Victoria

In our work, we constantly need to look up the EPSG codes based on a projection description, or vice versa. Here’s a list of the ones we commonly encounter in our work across Victoria.

EPSG Description MapInfo Projection String
EPSG:3857 GlobalMercator (also known as EPSG:900913) CoordSys Earth Projection 10, 157, 7, 0
EPSG:4326 WGS84 / Long/Lat CoordSys Earth Projection 1, 104
EPSG:4283 GDA94 / Long/Lat CoordSys Earth Projection 1, 116
EPSG:28354 GDA94 / MGA Zone 54 CoordSys Earth Projection 8, 116, “m”, 141, 0, 0.9996, 500000, 10000000
EPSG:28355 GDA94 / MGA Zone 55 CoordSys Earth Projection 8, 116, “m”, 147, 0, 0.9996, 500000, 10000000
EPSG:3111 GDA94 / Vicgrid94 CoordSys Earth Projection 3, 116, "m", 145, -37, -36, -38, 2500000, 2500000
EPSG:32754 WGS84 / UTM Zone 54 CoordSys Earth Projection 8, 104, “m”, 141, 0, 0.9996, 500000, 10000000
EPSG:32755 WGS84 / UTM Zone 55 CoordSys Earth Projection 8, 104, “m”, 147, 0, 0.9996, 500000, 10000000

Map Tile Scales

Thanks to http://indicatrix.wordpress.com for sourcing this handy reference for map tile scales used by Google Maps, Bing Maps, OpenStreetMap, etc.

Zoom level Scale denominator
0 559,082,264
1 279,541,132
2 139,770,566
3 69,885,283
4 34,942,642
5 17,471,321
6 8,735,660
7 4,367,830
8 2,183,915
9 1,091,958
10 545,979
11 272,989
12 136,495
13 68,247
14 34,124
15 17,062
16 8,531
17 4,265
18 2,133
19 1,066
20 533