[GRASSLIST:4678] Re: robinson projection

[Hamish]

> Hi all again, I have a weird problem.  I am trying to make a world map 
> using the robinson projection.  I have projected in a raster map of the 
> world into this location, and instead of obtaining the nice oval-ish 
> shape we are used to, the new raster is a rectangle with areas at the 
> edges duplicated.  The edges are distorted as they should be, but there 
> is no way to determine where the edges of the original map lay.  I 
> figured this is ok if I could project in a vector box of the world 
> (from a latlong location), and just use that as a mask.  Trouble is 
> that when I project in a vector area with bounding coordinates of n=72 
> s=-72 e=180 w=-180 in latlong space, it comes into the Robinson 
> location as a box, not an oval-ish shape.  This doesn't make any sense 
> to me.  Is this a problem with proj.4?  Or is it impossible to 
> delineate lines of longitude in the Robinson projection (measurement 
> units are meters)?


See also bug #2558:

http://intevation.de/rt/webrt?serial_num=2558




Hamish