spatstat or R alternative to ESRI Point Density Tool?

Question

I am trying to figure if it is best possible way to replicate ESRI point density tool in spatstat R package.

I got bunch of archaeological sites location with associated size and would like to compute surface with hectare per square km (magnitude-per-unit area as in ERSI tool) to track changes through time. I used spatstat density.ppp (with ppp rescaled to km) function to create point intensity per unit area surfaces, but I am not sure whether I should be using either weights argument in density.ppp or smooth.ppp or just use any kind of focal analysis function to get the hectare per km2 surface, which I understand ESRI point density tool is doing.

score 1 · Accepted Answer · answered Mar 24 '23 at 08:21

1

Use the spatstat function density.ppp with the weights argument giving the associated size of each site. That is,

density(X, weights=w)

where X is a point pattern object of class ppp, and w is a numeric vector of length equal to npoints(X) containing the associated sizes of the sites in the same order.

See page 173-174 of the spatstat book

answered Mar 24 '23 at 08:21

Adrian Baddeley

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perfect, now its all clear to me, also I checked that the sum of density values is equal to total area of sites. thank you! – Michal Michalski Mar 24 '23 at 15:37

spatstat or R alternative to ESRI Point Density Tool?

1 Answers1