Creation of Combined Grid Product

In large settlements 100 metre grids replace 1 kilometre grids to give greater resolution of population and household statistics.   The settlement development limits (SDLs) used were those as defined by the Planning Service. In total over 100 settlements in Northern Ireland have a population of greater than 1000 people (2001 Census). Outlined below are the various stages in creating a combined 100 metre and 1 kilometre grid-square file.


SDLs and 1km grids are used to determine the creation of 100m grids.


1km grids that contain part or all of an SDL are selected to be replaced by one hundred 100 metre grids.


100 metre grids replace whole 1km grids for 118 settlements in Northern Ireland.