OSi Large Scale Mapping
Ordnance Survey Ireland produce large scale mapping at 1:1000, 1:2500 and 1:5000 scales. These series are available in paper and digital formats.

1:1000 Mapping
This series is only available in urban areas. There are presently 1810 sheets covering urban areas with populations greater than 1,500 approximately, each sheet measures 800m x 600m (48 hectares). A structured revision programme is in place and maps are revised annually.

1:2500 Mapping
There are presently 4,700 sheets covering selected suburban and periurban areas of Ireland, each measuring 2000m x 1500m (300 hectares). A structured revision programme is in place with the aim of revising urban maps annually and periurban maps every three years.

1:5000 Mapping
There are presently 7,000 sheets covering rural areas of Ireland, each measuring 4000m x 3000m (1200 hectares). A structured revision programme is in place with the aim of revising the maps every five years.

OSi Large Scale Mapping Coverage
Click on map to view large scale coverage


Land Registry Compliant Maps
ARCHINFO supplies OSI maps specifically designed for Land Registration purposes. Land Registry compliant maps show ITM coordinates in the corners of the map. OSi and Land Registry are migrating from the Irish National Grid system to the ITM system on a phased basis. Digital mapping in ITM projection can also be supplied for Land Registry purposes.


Aerial Photography
Digitally scanned and ortho-rectified raster colour photography. The ortho-rectification process removes distortions caused by camera tilt and topographical features to produce a scale accurate image.

Latest colour aerial photography flown between 2004 and 2006, producing a photo scale of circa 1:40,000. Previous colour aerial photography flown in July 2000.

Coverage: National coverage (Republic of Ireland)

Specifications: 1m per pixel resolution. Available in IG or ITM.

File Formats: Digital format in TIFF. Each colour ortho-photo is approximate 9Mb in size.

Sample Aerial Photo

Aerial Photography


Small Scale Mapping: Holiday, Discovery, Digi City
Holiday Series mapping makes available the information from the OSi Road Atlas in Raster and Vector digital formats. Produced at a scale of 1:210000, this series is suitable for covering large areas (from 400 square kms to 2000 square kms) showing main roads, towns and cities.

Discovery Series mapping is available in paper and digital formats. Produced at 1:50000 scale, this series shows a range of useful detail including, street layouts, road numbers, townland names, rivers, historical and archaeological features etc. The OSi map system allows us to provide site-centred extracts anywhere in the Republic of Ireland.


Digital Formats

Vector: This nation-wide dataset has all features coded or multicoded to represent topographical features. The vector data (point, line & polygon) can be displayed at any scale with individual layers capable of being omitted or individually shown. Data is captured in 3D, with horizontal measurements in metres on the Irish Grid or Irish Transverse Mercator and vertical measurements on the Malin Head datum in metres above sea level.

Raster: The raster data is generated from vector data at 300 and 600 dpi, reproducing data as represented on published paper map sheets.

Data Series: This product is derived from a 1:10,000 digital databases and aerial photography of photoscale 1:30,000 - 1:40,000 with field verification. Some data e.g. Post Offices, tourist information etc. is derived from appropriate external organisations.

Coverage: National coverage of 1:50,000 Discovery topographical data in vector & raster format

Specifications: Available in IG (Irish Grid) or ITM

Sample Discovery Series Mapping

Discovery Series: 1:50000


Digi-City mapping offers the definitive OSi street mapping from publications such as the ever-popular Dublin City & District Street Guide and is available in both paper and digital format.

Digital Format

The Raster maps are generated from 1:1,000, 1:2,500 centre line data, reproducing details as represented on published map sheets at 300 and 600 dpi.

These datasets cover the greater urban areas of Dublin, Cork, Limerick, Galway and Waterford at scale of 1:10,000 - 1:15,000.

Specifications: Available in IG or ITM.

File Formats: Digital format in TIFF.

Sample Digi City Mapping

Street Mapping: 1:15000


Town Maps
OSi has recently published a range of Town Maps for 25 Counties (excluding Dublin). These are designed to be used in preparation for the new Small Public Service Vehicles Test (SPSV Test) run by the Taxi Regulator. However, these packs will also be of interest to those looking for Street Maps of cities and towns throughout Ireland.

CountyTowns Available
CarlowCarlow Town, Tullow, Muinebeag/Bagenalstown
CavanCavan Town, Cootehill, Virginia
ClareEnnis, Kilrush
CorkMidleton, Fermoy, Bandon, Skibbereen, Bantry, Mitchelstown, Kinsale + Cork City
DonegalLetterkenny, Buncrana, Ballybofey-Stranorlar, Ballyshannon, Donegal Town
GalwayTuam, Ballinasloe, Gort, Clifden + Galway City
KerryTralee, Killarney, Listowel, An Daingean, Caherciveen
KildareNewbridge, Naas, Celbridge, Maynooth, Athy
KilkennyThomastown + Kilkenny City
LaoisPortlaoise, Mountmellick
LeitrimCarrick-on-Shannon, Manorhamilton
LimerickAbbeyfeale + Limerick City
LongfordLongford Town, Edgeworthstown
LouthDrogheda, Dundalk, Ardee
MayoCastlebar, Ballina, Westport, Claremorris
MeathNavan, Laytown, Bettystown, Ashbourne, Trim, Kells
MonaghanMonaghan Town, Carrickmacross, Castleblaney, Clones
OffalyTullamore, Birr
RoscommonRoscommon Town, Boyle, Castlerea
SligoSligo Town, Tubbercurry
TipperaryClonmel, Nenagh, Thurles, Tipperary Town, Templemore
WaterfordTramore, Dungarvan + Waterford City
WestmeathMullingar, Athlone, Moate
WexfordWexford Town, Enniscorthy, New Ross, Gorey
WicklowBray, Wicklow Town, Greystones, Arklow, Blessington

Click here for a Sample Town Map

Town Maps


Historical and Administrative Mapping

  • First edition 6inch OSi mapping 1834-1846 available in paper and PDF format
  • First edition 25inch OSi mapping 1892-1913 available in paper and PDF format
  • 1:50,000 Discovery Series, a complete set covering the whole country
  • To help locate sites we have a complete set of townland indexes
  • To trace the history of a building we use the 1st edition (1834-1846) 6 inch maps
  • Dublin historical maps include those by John Rocque, Pool & Cash, William Duncan and the Dublin 5 feet to a mile series from the 1840's
  • We have a range of Parish Maps for the greater Dublin area from the 1860s
  • The collection also includes administrative, ward and D.E.D. maps
  • Natural heritage area maps for the entire country


Dublin City from a John Roque map of 1756
Detail showing part of Dublin City from a John Roque map of 1756 - from the Architecture Library's map collection. Click here for a larger image of this map.


OSi Archive Maps
Ordnance Survey Ireland have made the first edition 6inch:1mile, and 25inch:1mile maps available through their mapping system. The 6inch maps are available in black & white, and colour. This series dates from 1834-1846. The 25inch maps offer greater detail, and date from 1892-1913. These maps can be an invaluable tool in tracing the development of a site.

Sample Archive 6inch map

Sample Archive 25inch map