Site Proximity Map

[Greg Koerper]

> I would like to create a raster map where the raster
> catagory is equal to the attribute of the nearest site.
> I'm not worried about the case where two sites are 
> an equal distance from the raster location since I
> have a large uncertainty in my site locations anyway.
> 
> The only approach I have come up with is to modify
> the code for s.surf.idw so that rather than computing
> a weighted average, the new code would simply use
> the attribute of the nearest neighbor.  Though this
> would not be too difficult, is the facility already 
> available (and I can't find it).

Just set npoints=1 and you will get the value of the nearest neighbor.

greg

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Greg Koerper                            Internet: greg at heart.cor.epa.gov
ManTech Environmental Technology, Inc.  
US EPA Environmental Research Lab	voice:	(503) 754-4490
200 SW 35th St., JSB                    fax:    (503) 754-4338
Corvallis, OR   97333     
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