Have you seen this page: http://code.google.com/apis/maps/documentation/javascript/maptypes.html#CustomMapTypes
You say that you have many (cartesian?) coordinates already - what is the range of these coordinates? Could you normalise all your coordinates so X and Y values range from 0 to 256? If you could do that then your coordinates would essentially be what Google call 'World Coordinates'. With world coordinates you can then use built in API methods to convert world coordinates to and from both pixel coordinates and geographical (lat, lng) coordinates. Your google.maps.Map object has a getProjection() method: http://code.google.com/apis/maps/documentation/javascript/reference.html#Map That returns the map's projection, the projection has two methods: fromLatLngToPoint() and fromPointToLatLng() that will do these conversions for you: http://code.google.com/apis/maps/documentation/javascript/reference.html#Projection If your knowledge of javascript is advanced you might even consider writing your own 'cartesian projection'. The cartesian projection would work directly with cartesian (x, y) coordinates with no need to convert to geographical (lat, lng) coordinates: https://groups.google.com/group/google-maps-js-api-v3/search?hl=en&group=google-maps-js-api-v3&q=create+new+projection&qt_g=Search+this+group Martin. On May 29, 12:26 am, Jason Kaczmarsky <[email protected]> wrote: > I think I'm on the right track. In the getTile function it creates all > the tiles for the map and returns each of them. Obviously each tile is > placed accordingly on the page. My idea was to fetch this position in > the getTile function and when I view a tile DIV it does show the > position on the page. However, the div does not get created in getTile > so it has no position yet, it returns it to another function so I > cannot access the position. What does getTile return to? I think if I > try to access the position from there, I can get it all working. > > On May 28, 7:00 pm, Jason Kaczmarsky <[email protected]> wrote: > > > > > > > > > Alright I got something figured out. I found out how to calculate the > > tile at which a certain point it located based on the zoom level. I > > still don't understand how I can translate the tile/point position to > > workable coordinates. > > > I believe if I can get a particular tile's position relative to the > > window position, I can then get the difference and draw a marker based > > on that. > > > Don't know if it's obvious, but I'm working in JavaScript and I would > > like to draw a div at each point. If I can get the relative position > > of a tile to the window, I can absolutely position a div relative to > > the tile's X/Y values in the window. > > > On May 28, 6:05 am, John Coryat <[email protected]> wrote: > > > > You can convert a pixel coordinate into a latitude and longitude fairly > > > easy. One thing you need to consider. All pixel coordinates are based on a > > > particular zoom level. If all your pixel coordinates are assuming one > > > static > > > layer, you'll have to figure out what corresponding zoom that represents > > > and > > > calculate latitude and longitude based on that. > > > > Here's a Perl module with the tile math. > > > >http://www.usnaviguide.com/google-tiles.htm > > > > Hope that helps. > > > > -John Coryat > > > >http://maps.huge.info > > > >http://www.usnaviguide.com > > > >http://www.zipmaps.net -- 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 [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-js-api-v3?hl=en.
