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I'm computing a spatial weights matrix in PySAL using Queens Contiguity. My problem is that I would like to consider areas that are contiguous to the first set of neighbours (ie. 2nd or even 3rd order contiguity.)

Reading the docs here...

https://pysal.org/libpysal/generated/libpysal.weights.Queen.html#libpysal.weights.Queen

...leads me to conclude that higher order contiguity is not possible with the Queens weighting in PySAL since I can't find a parameter for it.

GeoDa seems to have the option as illustrated here:

GeoDa Queens dialog

Source: https://geodacenter.github.io/workbook/4a_contig_weights/lab4a.html#queen-contiguity

Am I missing something or is it not possible in PySAL?

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This can be accomplished using higher order weights.

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  • Great, that makes sense and is very flexible. To elaborate for those finding this answer later the function is called weights.higher_order and can be applied to any weights object. So in my case I compute Queens Contiguity and output the weight object w and then supply that to the higher_order function with my desired k-value for the order. – hexamon May 27 '20 at 11:42

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