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<H2><A NAME="SECTION00374000000000000000">
1.7.4 Albers projection</A>
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<P>
The Albers projection (<B>-JB</B>) is an equal-area conical projection;
its conformal cousin is the Lambert conic projection (<B>-JL</B>).
Their usages are almost identical so we will only use the Albers here.
The general syntax is
<BR>
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<B>-JB</B><!-- MATH
$lon_0/lat_0/lat_1/lat_2/width$
-->
<IMG
WIDTH="172" HEIGHT="31" ALIGN="MIDDLE" BORDER="0"
SRC="img22.gif"
ALT="$lon_0/lat_0/lat_1/lat_2/width$">
<BR>
<P>
where (<IMG
WIDTH="62" HEIGHT="29" ALIGN="MIDDLE" BORDER="0"
SRC="img33.gif"
ALT="$lon_0, lat_0$">) is the map (projection) center and <IMG
WIDTH="58" HEIGHT="29" ALIGN="MIDDLE" BORDER="0"
SRC="img34.gif"
ALT="$lat_1, lat_2$">
are the two standard parallels where the cone intersects the Earth's surface.
We try the following command:
<P>
<PRE>
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
</PRE>
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<ADDRESS>
Paul Wessel
2001-04-18
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