btw, that is only one approach. Doing server side 'clustering' might be better suited (rather than just picking a sample). There are various ways to do that. https://www.google.com/search?q=server+side+clustering+google+maps
Or you can just outsource it http://geocubes.com/ one of a few sites offering it :) On Mon, Mar 5, 2012 at 2:17 PM, Barry Hunter <barrybhun...@gmail.com> wrote: > Here is a map that does that > http://wales.portal.geographs.org/map.php?view=thumbs > > Ok, that particular map is not using millions of markers, but the same > technique works for bigger datasets. (I just dont have any big > datasets using v3 of the maps api) > > The biggest issue is deciding which features to show as the 'sample'. > Picking random works reasonably well. But there are more elaborate > ways of doing it. You could perhaps pick the top rated (if your > dataset has that) > > On Mon, Mar 5, 2012 at 1:58 PM, Henri Cammiade <henri.cammi...@gmail.com> > wrote: >> Yes. Obviously it is pointless displaying markers in areas half way around >> the world to the view port. The DB has millions of locations - what is the >> best way to build the gmap for high performance of loading initial markers >> and for loading additional markers on pan/zoom. >> >> Thanks >> >> On Mar 5, 2012 3:16 AM, "Rossko" <ros...@culzean.clara.co.uk> wrote: >>> >>> > I'd like to know what are the best strategies and practises to use >>> > when building a google map that has millions of markers. >>> >>> Go back a step and re-examine your needs. A viewer isn't goimg to get >>> much value out of a map with millions of markers on it, so you could >>> perhaps think about what you want to actually show at any given time >>> (perhaps from an available pool of millions of markers) >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Google Maps JavaScript API v3" group. >>> To post to this group, send email to >>> google-maps-js-api-v3@googlegroups.com. >>> To unsubscribe from this group, send email to >>> google-maps-js-api-v3+unsubscr...@googlegroups.com. >>> For more options, visit this group at >>> http://groups.google.com/group/google-maps-js-api-v3?hl=en. >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google Maps JavaScript API v3" group. >> To post to this group, send email to google-maps-js-api-v3@googlegroups.com. >> To unsubscribe from this group, send email to >> google-maps-js-api-v3+unsubscr...@googlegroups.com. >> For more options, visit this group at >> http://groups.google.com/group/google-maps-js-api-v3?hl=en. -- You received this message because you are subscribed to the Google Groups "Google Maps JavaScript API v3" group. To post to this group, send email to google-maps-js-api-v3@googlegroups.com. To unsubscribe from this group, send email to google-maps-js-api-v3+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-maps-js-api-v3?hl=en.
