> ... I suppose "lat" is the latitude of the center > point.
"lat" is the latitude of wherever it is you are trying to calculate pixels-per-whatever. Bear in mind it'll only be truly valid at that place, not all over the map, but unless you are looking at large chunks of the globe, it will do. > But I don't know what is 40075017 ... Circumferance of the earth in meters, you don't need that. > and how can I change this > formula to get degree per pixel in north/south axe... The text explains that the interesting part for you, which is a factor converting pixels-per-degree form the easy north-south version to the harder east-west, is accomplished by cos(lat) Pixels per degree-EW = cos(lat) * pixels per degree-NS ?? Not a maps API question, basic trigonometry. cheers, Ross K --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
