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A coordinate system consists of datum and a projection. A datum is a system for applying a grid to the surface of the Earth using a reference or measurements. There are many different ways to place this grid on the earth, which formulate all the different types of datums. A map projection uses the datum as a point of reference to represent a spherical or curved surface on a flat plane. 

There are a few types of coordinate systems, but commonly utilized are Geographic coordinate systems and Projected coordinate systems. Geographic coordinate systems are based on a spheroid and use angular units of measure (degrees). A Projected coordinate system is based on a spheroid projected onto a flat 2D surface and utilize linear units (meters, feet..ect.) Projected coordinate systems tend to be more commonly used (State planes, UTM, etc.).

Below are Nearmap's coordinate system specifications:

Please note the spatial accuracy of Nearmap imagery may be at a lower quality when using projections not listed in this document. 

World-wide:

  • EPSG:4326 - WGS 84 / Geodetic
  • EPSG:3785 - aka EPSG:3857 - WGS 84 / World Mercator

Australia

  • EPSG:4283 - GDA 94 / Geodetic
  • MGA zones 49 to 56
    • EPSG:28349 to EPSG:28356 - GDA 94 / MGA zone #
  • SR-ORG:7400 Perth Coastal Grid 1994
  • EPSG:3107 GDA94 / SA Lambert

New Zealand

  • WGS 84 / Spherical Mercator
  • WGS 84 / UTM zone 60S
  • NZGD2000 / UTM zone 60S
  • NZGD2000 / New Zealand Transverse Mercator 2000
  • New Zealand Continental Shelf Lambert Conformal 2000 (NZCS2000)

North America

NAD83 realization is "NAD83(2011) 2010.0 epoch"

  • EPSG:4269 - NAD 83 / Geodetic
  • NAD83 / UTM zones 9 to 18
    • EPSG:26909 to EPSG:26918 - NAD83 \ UTM zone #
  • EPSG:3310 - NAD 83 / California Teale Albers

****Use NAD83 / UTM Zones when using state plane systems. See UTM Zone chart below:


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