Thanks Mike, If the doubling is fairly consistent I'll be fine. I'll need to add a Mercator projection into the algorithm since I'm dealing with Canada.
On Jan 19, 9:29 pm, Mike Williams <[email protected]> wrote: > Wasn't itjameslovewho wrote: > > >I am using semi-transparent markers to approximate a heatmap which is > >also clickable. I have a 25x25 pixel marker which I'd like to expand > >upon zooming down each level. I can do a hit and miss to find out what > >the proportional difference would be with each zoom level, but I > >wondered whether anyone has done this before? > > The size should double for each zoom level. However, if you're going to > be dealing with large areas, you may also need to vary the size > depending on latitude. In the Mercator projection, the amount of ground > covered by 25 pixels increases as you move away from the equator. > > --http://econym.org.uk/gmap > The Blackpool Community Church Javascript Team --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
