> I really appreciate you prompt response. I wrote c# & SQL functions > which check for distance and returns all the zip code within radius of > given zip code. When I verified result with couple different web > sites, it is not matching.
Maybe they use a different definition of "within radius". Zipcodes are not points, they are areas. One way to define "within radius" would be "the zipcode 'centre' within radius". That brings up another issue, where is the centre of an irregular area? but is an easy way to implement. Another way to define is "any part of the zipcode area is within radius", which is more difficult to implement as you would be looking for intersecting polygons. A quick cheat alertnative way to implement is not to consider radius at all, but instead look for zipcodes in an R x R box. Who knows what your "different web sites" use, nor if they have the same zipcode database as you do. In fact, we have no idea how you are doing your own calculations. -- You received this message because you are subscribed to the Google Groups "Google Maps API V2" 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.
