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Neighbours

filter: Filter data set. Format of the filter dataset; description aside.
filterW: Weight data set (usually with extension ".wgt"); description aside. Normally, the absolute population number form the weights.

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.fil format

For each boundary:
number of areal unit on one side;
number of areal unit on the other side;
length of common boundary (tab delimitted). Please note: we use a serial number of the areal units and not the IDs. Borders to lakes or to polygons outside the covered region may have the same number for the to adjacent polygons.

Example:

1 2 3773.99738 1 9 2648.35318 1 12 115.0252 2 2 1345.30548 2 9 2999.51607 ... 171 167 1613.47709 -999

There are different ways to generate a .fil filter. Here you find a R program and a provisional documentation for a 2 step process (ArcGIS + Excel).

.wgt format

It has the following structure: 1st row: number of observations; 2nd to (nobs+1)th row: ID / weight of unit ID (tab delimitted).

Example: