TrackerMap is a backdrop raster map product based on the Ordnance Survey Northern Ireland 1:10,000 data set. It consists of digital images, ideally suited for scales on screen in the range 1:10,000 to 1:2,000. There is also a vector layer of place names suitable for use with the Find command in MapInfo Professional.
TrackerMap OSNI suggested applications
- Contextual map data to display analytical information;
- Overview to show detailed site locations;
- Vehicle tracking or routing backdrop;
- Location planning.
TrackerMap OSNI features & use
- Outstandingly clear street-level mapping, with cartographically positioned text;
- Similar to PlannerMap images but with additional line details such as fences, walls and hedges;
- Read clearly the names of every street and important building;
- Storage size has been minimised by sub-sampling and reduction of colour depth;
- Subtle pastel colours are used, so any overlay layers can be seen more readily;
- Find over 400 settlements: towns, cities, suburbs and villages;
- Supplied as 5km square images, available in any combination;
- Use memory effectively, as seamless tables load and unload images when required.
TrackerMap OSNI technical information
A workspace or project file is supplied.
The nominal scale of these images is 1:10,000 (about 6 inches to 1 mile) and the resolution is 10 dots/mm (254 dpi). Each pixel represents 1m square.
The Irish Transverse Mercator Grid co-ordinate system is used.
The colour images all use the same 4-bit palette of 16 colours. The edges between adjacent colours are slightly softened to improve the appearance. LZW compression is used.
The storage space required is approximately 4.4Gb per 5km x 5km tile on average.
Main formats available: TIFF, JPEG and others, along with georeferencing files for use in GIS.
Coverage available
- Northern Ireland; or
- selected area (priced per tile); and
- Great Britain (companion product - TrackerMap - derived from the Ordnance Survey 1:10,000 Scale Colour Raster dataset).