Main and minor road network
Using ArcInfo a fine 0.1 DM grid with a value of 1 for cells which contained
main or minor road sections (selections from the communications network)
and a value of 0 otherwise was created. This grid was aggregated into 1,
2, 3, 5, 7, 11, 13 DM resolution grids with the values in each cell being
the sum of cells values in the fine grid. ArcView was then used to split
the higher level aggregations into the 1DM resolution so that all the grids
contained the same number of cells. The aggregations were then weighted
and summed together to produce the final input data values mapped above.
This map is very similar to the communications network density map since
a large part of the communications network is major and minor roads.
The density of major and minor roads is very high in Ireland.