http://code.google.com/apis/maps/documentation/javascript/maptypes.html#CustomMapTypes <http://code.google.com/apis/maps/documentation/javascript/maptypes.html#CustomMapTypes>Goes into a very detailed explanation of the projection Google uses to display their maps.
It is a Mercator projection, but you can find a very detailed explanation at the link there and with further research you can see how exactly they go about displaying the map, as well as the benefits and downfalls to using Mercator projection. But basically what it boils down to is that any map projection is taking the earth, which is not flat, and trying to flatten it out to display it to you on a map. Every projection has its benefits as well as downfalls. Read up on that and you can have a better understanding of the projection Google uses. On Mon, Aug 23, 2010 at 11:13 AM, unxcolin <colin.mei...@googlemail.com>wrote: > Thanks for the replies. > > Yes the data is from http://www.diva-gis.org/ - or at least it's the > same as this data. Not sure what projection the data I have is but it > seems to be standard across all official sources, is this different to > what Google use? > > I've spoken to a Burmese geospatial mapping guy and he said Google > Maps is not technically accurate, is this correct? What projection is > Google maps? > > I mean if you look down the south of Burma in the example there are > many small islands that exist on the overlay that are not even on > Google maps? And to the east of Yangoon at the coast the map is > nowhere near! > > > On Aug 23, 3:37 pm, Grok Lobster <discgolfm...@gmail.com> wrote: > > Try the data from here,http://www.diva-gis.org/ > > > > On Aug 23, 5:28 am, unxcolin <colin.mei...@googlemail.com> wrote: > > > > > > > > > > > > > > > > > Hi, > > > > > I'm trying to overlay a polygon of Burma, and it's states using the > > > official data provided my numerous organisations (inc. the > > > "government"). > > > > > However this data when overlayed isn't really anywhere near what > > > Google Maps has marked on the map, and is specifically misaligned when > > > zoomed right in. Is there any way to resolve this, is there a known > > > algorithm I need to run my data through which will fit it to Googles > > > borders, do Google make their border data available for public use? > > > > > Example:http://bit.ly/d22gZo > > > > > Thanks, > > > > > Colin > > -- > 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...@googlegroups.com. > To unsubscribe from this group, send email to > google-maps-js-api-v3+unsubscr...@googlegroups.com<google-maps-js-api-v3%2bunsubscr...@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...@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.
