Thanks! That's really helpful. On Sep 29, 3:39 pm, Nianwei Liu <[email protected]> wrote: > Search for Albers > inhttp://google-maps-utility-library-v3.googlecode.com/svn/trunk/arcgis... > > On Sep 29, 12:02 pm, Albert Sun <[email protected]> wrote: > > > Hello Friendly People, > > > I'm trying to implement a map with a custom base map and a custom > > projection. I started from the code examples > > herehttp://code.google.com/apis/maps/documentation/javascript/maptypes.html > > and I'm trying to implement an Albers Equal Area Projection instead of > > the Gall Peters one. I'm using this formula to do > > ithttp://mathworld.wolfram.com/AlbersEqual-AreaConicProjection.html > > > The equations aren't coming out right though, and the functions aren't > > working properly as inverses of each other. > > > When I do albers.fromPointToLatLng(albers.fromLatLngToPoint(new > > google.maps.LatLng(32, -80))) I get a LatLng where the longitude is > > right, but the latitude wrong. In the fromPointToLatLng function, its > > trying to take the arcsin of a number greater than one. > > > I'm pretty sure I need to scale the results from the functions up and > > down to world coordinates but am not sure how to do it. > > > My code here: > > >http://albertsun.info/misc/maptype-base.html > > > Any help would be much appreciated! > > > Thanks, > > > Albert > >
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