Servet:
I am afraid that your speculation about alternative calculations of the
distance is not implemented in the current SPGWR. Depending on how the
sea-way distance is determined (the bird's flight distance is basically
an Euclidean distance and can be formulated rather easily in R. If it is
the case for sea-ways (easy to formulate), then I don't think the
functionality is hard to add (adding alternative distance calculations
in the coding). You are more than welcome to contribute to the code.
Cheers,
Danlin
Servet Ahmet Cizmeli ??:
Hello all,
I am about to perform a GWR analysis using measurements collected at sea
onboard a ship. Some of the stations are located at opposite sides of an
island or within adjacent bays... Measuring bird's flight distances between
the stations do not make sense at all those cases.
Is there any way to presently instruct the R's implementation of GWR that
the distances are to be measured along sea-ways? This would probably
necessitate the concurrent input of a land mask (or polygon).
As I presume the answer of the above question is NO (no mention of it
anywhere in the GWR documentation), I would like to know how difficult
would it be to add that functionality for a r-novice like me.
thanks
Servet
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___________________________________________
Danlin Yu, Ph.D.
Assistant Professor of GIS and Urban Geography
Department of Earth & Environmental Studies
Montclair State University
Montclair, NJ, 07043
Tel: 973-655-4313
Fax: 973-655-4072
email: y...@mail.montclair.edu
webpage: csam.montclair.edu/~yu
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