新买 a écrit :
> As Adrian refered, I know Mercator cann't act when the point close
> to 90 N or 90 S.
My appologizes for looking rude in my third email then...
> Or can you tell me how to refer a clip region to render map, such as
>
> MapPainter mapPainter = new MapPainter(shpMap);
> mapPainter.render(85, -180, 80, -85, "test.png");
On the rendering side, I can't said.
As far as the "referencing" module is concerned, if you used an ellipsoidal
datum, it may be worth to try a spherical case instead since the spherical
formulas are simplier. I don't know how you CRS were created (EPSG code? WKT?),
but if it was from WKT, try an "inverse flattening" value (in the ELLIPSOID[...]
element) of 0.
Martin
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