Skip to Main Content
It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.

Maps: Ordnance Survey of Ireland

Information on Map resources at IT, Sligo


The Ordnance Survey of Ireland is Ireland's official mapping agency. It was established in 1824 and became a state body under the Ordnance Survey of Ireland act 2001.  The OSI's mapping activity covers almost two centuries, beginning with the 6" sheets produced in 1837 - 1842.  It produces a popular 1:50000 series of maps for general and tourist purposes and through its GeoHive and Mapgenie services, makes available a wealth of digital mapping information.

Ordnance Survey of Ireland Digital Maps

The National Mapping Agreement allows educational institutions to access Ordnance Survey of Ireland mapping data not normally made available to the general public.  One of the main features is the use of the premium basemaps which display a high level of detail at a large scale.     

Access to maps available under the National Mapping Agreement is at:

(Note: NMA mapping may not work correctly in all browsers.  If the default browser on your PC won't open the correct basemap, copy the link above and paste it into the address line of an alternative up to date browser)

The link will bring you to a login page.

You will need to get the username and password from the Library.

When you enter your username and password, a screen will open with Introducing Geohive.

At the top of the screen choose the link Make Your Map.  This will open the map viewer for the National Mapping Agreement.  When you are finished using the Mapviewer, Click the NMA Viewer logo at the top left of the screen.  This will return you to the Introducing Geohive page.

Click Logout at the top right of the screen.  Otherwise you may not be able to access the National Mapping Agreement  Viewer again until the system times you out.





This digital map service is available on the Ordnance Survey of Ireland web site:     Services  Geohive

Or you can go directly to the mapviewer     Mapviewer

When you enter the page, a map of Ireland is displayed.

At the top right of the screen is a +/- zoom tool

Click/Hold the mouse to move the map around

There is a Search Box at the top of the screen to find particular addresses

Another tool for customising your map is the:

Data Catalogue

On a PC this appears to the left of the screen

On other devices it may be necessary to select a menu link to make it appear.

Each item you select in the data catalogue will be added as a layer to the map.

When you select an item, a Transparency tool appears allowing you to fade it in and out.

In this way you can create a map with different layers of information.


Ordnance Survey of Ireland Print Maps in the Yeats Library

Print maps in the Yeats Library are held in a series of upright cabinets and plan drawer cabinets in the Infozone.

Most maps are listed and may be searched by keyword or other headings in the Library Print Catalogue.  There are also lists and other information regarding the maps on the cabinets themselves. In addition to providing the title of each map, the lists on the upright cabinets indicate towns and other locations found on each map as a general guide to finding the location you require.

A summary of the Ordnance Survey maps in the cabinets is provided in the tabs Upright Cabinet 1 and Upright Cabinet 2

  • Indexes
  • Characteristic Sheets
  • County Sligo, Scale 6 inches to one mile, Sheet 1-47 (Revised 1909-14, 1941-43)
  • County Sligo, Scale 25 inches to one mile, selection of sheets (Revision 1911-12, 1940-41)
  • County Leitrim, Scale 6 inches to one mile, selection of sheets (Revision 1907-10, 1943)
  • County Donegal, Scale 25 inches to one mile, sheet 106/15
  • County Mayo, Scale 25 inches to one mile, sheet LXX/6

Note:  In order to provide coverage of the island of Ireland as a whole with an integrated numbering system, the Ordnance Survey of Ireland and the Ordnance Survey of Northern Ireland use a continuous numbering system for their Discovery and Discoverer series.

  • Discovery Series/Discoverer Series, sheets 1-89, scale 1:50000, published 1991-2005
  • Ordnance Survey of Ireland, scale 1/2 inch to one mile, Sheet 3, South Donegal
  • Town Plan Sligo, scale 1:1000, 16 sheets, published 1985-1986