True. I guess I will create centroid data points and use TransCAD to compute distances between centroids.
Thanks!!! On 5月31日, 午前1:41, Andrew Leach <[email protected]> wrote: > On 30 May 2010 14:32, Takatsugu Kobayashi <[email protected]> wrote: > > > Straight distances are not quite useful for > > pairs of zip codes that are connected with winding roads. > > I think John's point was more that zip codes represent an area, so any > sort of distance will necessarily be inaccurate, unless your start/end > points are guaranteed always to be at the centroids of the zipcode > polygons. > > -- > Andrew C Leach -- You received this message because you are subscribed to the Google Groups "Google Maps API" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-maps-api?hl=en.
