[Proj] invproj call

[Seb]

Hi,

I've only recently started using proj4 tools directly.  I need to do an
inverse projection (back to lat lon geographic coordinates) from an Albers
equal area projection.  The projection details for the source are:


projection="Albers Conic"
lat_0=45
lon_0=55
lat_1=40
lat_2=50


No other information is provided, but I assume WGS84 datum.  So I wrote
the invproj call like:


invproj +proj=aea +lat_0=45 +lon_0=55 +lat_1=40 +lat_2=50 +datum=WGS84


but I'm getting some strange results, as if the data have been shifted
more than I would expect.  Is my call correct based on the given input?
Thanks in advance for any comments.


Cheers,

-- 
Seb