1:250,000 raster
A raster map is a static image displayed on screen which is suitable as background mapping.
Each raster image is made up of a series of equally sized cells (or pixels) arranged in rows and columns. 1:250,000 raster is cartographically identical to the paper Holiday North map.
Key features
- OSNI raster images are geo-referenced so that they display in their right geographic location when viewed in a Geographic Information (GI) software package
- complete coverage of Northern Ireland and border counties of the Republic of Ireland
- shows roads, with A and B class roads numbered, railways, villages, towns, cities, county boundaries and selected points of interest
- also shows forests, rivers, place names, car parks, picnic sites, golf courses, caravan parks, and antiquity sites
- altitude tinting gives a clear indication of terrain height
Applications
- background mapping
- route planning
- desk-top publishing
- web information services
Technical information
- can be displayed on most GI and graphics software packages
- available in tiff and ecw formats
- Irish Grid co-ordinates can be found for any point on the map
- available as one tile covering the whole of Northern Ireland
- no file conversion necessary
- supplied at 300 dpi
- file size 215MB (tiff)