ACEmap large scale

The OSNI Address Centred Extract (ACE) is a large scale location map for Northern Ireland. The map is used for planning, property conveyancing.and applications to NI Water.

How ACEmap is generated

The map is generated directly from OSNI Largescale vector data and is surveyed at 1:1,250 or 1:2,500 scales.

The ACEmap is centred on a site specific area, either in landscape or portrait orientation, at scales of:

  • 1:500
  • 1:1,250
  • 1: 2,500
  • 1: 5,000

It is available in PDF format and can be downloaded in either A4 or A3 size. You can also order it in paper format in sizes A4 – A0. Both the paper and PDF versions of ACEmap have Irish Grid lines and coordinates shown directly on the map.

Each ACEmap is generated on a bespoke basis and uses the most up-to-date data available.

Getting an ACEmap

You can order the map online and receive it by email.

More useful links

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