distance problem in GWR
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: yud at mail.montclair.edu webpage: csam.montclair.edu/~yu