Motorway and Dual carriageway network density
Description
Using ArcInfo a fine 0.1 DM grid with a value of 1 for cells which contained motorway or dual carriageway (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 layer values.Source=Bartholomew data
Comments
- Since the communications infrastructure appeared to be a good indicators of where many people live it was selected from and maniputlated into various different layers to provide extra information.
- This layer appears to highlight more densely populated areas. By only looking at aggregations upto 13 the information is still highly concentrated around motorways and dual carriageways. As these roads are so important in todays society it is likely that there influence on population patterns extends beyond this and so a motorway and dual carriageway cost distance layer may also be useful.
