The Albers projection (-JB) is an equal-area conical projection;
its conformal cousin is the Lambert conic projection (-JL).
Their usages are almost identical so we will only use the Albers here.
The general syntax is
where () is the map (projection) center and are the two standard parallels where the cone intersects the Earth's surface. We try the following command:
pscoast -R-130/-70/24/52 -JB-100/35/33/45/6i -B10g5:."Conic Projection": \ -N1/2p -N2/0.25p -A500 -G200 -W0.25p -P >! map.ps