By UTM do you mean Universal Transverse Mercator? Well hmm I'm not quite sure what issue i would run into with someone living on the edge of the zone.
Typically this request is a one time thing. The request goes in and the person either is within (on the line inside) the boundary or they are just out side. There are no moving parts here no flow of data across the screen just a direct request and a return of who fits that data. This search doesn't have to be built proof I mean I just want to get a basis of how to do this so I can see what happens. Also the portion about meters confuses me. Whats the benefit of the portion at the end? On Sunday, July 15, 2012 4:23:34 PM UTC-4, Dennis Lee Bieber wrote: > > On Sun, 15 Jul 2012 09:47:12 -0700 (PDT), JJ Zolper > <codinga...@gmail.com> declaimed the following in > gmane.comp.python.django.user: > > > > First the user enters their town for example so Vienna, VA. Then they > > choose how far from their location so 25 miles. But then they also have > an > > advanced search option where they can refine their request even more. > They > > are able to play around with a Google Map on the side and zoom into > their > > physical house location on the map and put a marker/point there of some > > sort. This could be lat/long I don't know yet. This way if that data > checks > > out they get an even more accurate representation of the artists in > their > > area. Any thoughts or opinions on how you think I should go about this? > > > I'm tempted to suggest using UTM internally, but you'd probably > end > up with somebody living on the edge of a zone, and having to special > case the search radius as it crosses the zone boundary. > > Reason to consider UTM? Coordinates are in meters, and computing > if > a point is within a 40000m (40km => ~25 miles) just becomes a case of > applying Pythagoras [sqrt((x1-x2)^2 + (y1-y2)^2) <= radius]. > > http://www.uwgb.edu/dutchs/usefuldata/utmformulas.htm > -- > Wulfraed Dennis Lee Bieber AF6VN > wlfr...@ix.netcom.com HTTP://wlfraed.home.netcom.com/ > > -- You received this message because you are subscribed to the Google Groups "Django users" group. To view this discussion on the web visit https://groups.google.com/d/msg/django-users/-/uynE7lYpqrwJ. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
