Not really sure I understand your constraints, but perhaps
RSiteSearch("convex hull ")
might help?
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Sent from my phone. Please excuse my brevity.
On August 15, 2014 7:51:37 AM PDT, Bob O'Hara <rni....@gmail.com> wrote:
>I've been struggling for half a day on what should be a simple
>problem...
>
>I have a data frame of lat/long coordinates that describe a region, and
>I
>want to draw a polygon around them so I can use that as a boundary (to
>be
>thrown at INLA, but those details aren't important). The coordinates
>are
>almost on a regular grid: there is some variation in latitude (because
>we're on a globe).
>
>If the coordinates were on a regular grid, I could use as.owin() to
>create
>a mask, and go on from there (I have code that will work). But
>as.owin()
>doesn't like unevenly spaced points.
>
>Can anyone suggest a way to sort this out? Preferable without having to
>mess around transforming the coordinates.
>
>Bob
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