<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <!--Converted with LaTeX2HTML 2002-2-1 (1.71) original version by: Nikos Drakos, CBLU, University of Leeds * revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan * with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --> <HTML> <HEAD> <TITLE>1.4.4 Albers projection</TITLE> <META NAME="description" CONTENT="1.4.4 Albers projection"> <META NAME="keywords" CONTENT="GMT_Tutorial"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <META NAME="Generator" CONTENT="LaTeX2HTML v2002-2-1"> <META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"> <LINK REL="STYLESHEET" HREF="GMT_Tutorial.css"> <LINK REL="next" HREF="node29.html"> <LINK REL="previous" HREF="node25.html"> <LINK REL="up" HREF="node20.html"> <LINK REL="next" HREF="node28.html"> </HEAD> <BODY bgcolor="#ffffff"> <!--Navigation Panel--> <A NAME="tex2html771" HREF="node28.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html765" HREF="node20.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html759" HREF="node26.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html767" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <A NAME="tex2html769" HREF="node63.html"> <IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="index.png"></A> <BR> <B> Next:</B> <A NAME="tex2html772" HREF="node28.html">1.4.4.1 Exercises</A> <B> Up:</B> <A NAME="tex2html766" HREF="node20.html">1.4 Laboratory Exercises</A> <B> Previous:</B> <A NAME="tex2html760" HREF="node26.html">1.4.3.1 Exercises</A> <B> <A NAME="tex2html768" HREF="node1.html">Contents</A></B> <B> <A NAME="tex2html770" HREF="node63.html">Index</A></B> <BR> <BR> <!--End of Navigation Panel--> <H2><A NAME="SECTION00344000000000000000"> 1.4.4 Albers projection</A> </H2> <A NAME="1557"></A> <A NAME="575"></A> <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> <P> <B>-JB</B><!-- MATH $lon_0/lat_0/lat_1/lat_2/width$ --> <IMG WIDTH="172" HEIGHT="31" ALIGN="MIDDLE" BORDER="0" SRC="img9.png" ALT="$lon_0/lat_0/lat_1/lat_2/width$"> <BR> <P> where (<IMG WIDTH="62" HEIGHT="29" ALIGN="MIDDLE" BORDER="0" SRC="img10.png" ALT="$lon_0, lat_0$">) is the map (projection) center and <IMG WIDTH="58" HEIGHT="29" ALIGN="MIDDLE" BORDER="0" SRC="img11.png" 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/thickest -N2/thinnest -A500 -Ggray -Wthinnest -P > map.ps </PRE> <P> <BR><HR> <!--Table of Child-Links--> <A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A> <UL> <LI><A NAME="tex2html773" HREF="node28.html">1.4.4.1 Exercises</A> </UL> <!--End of Table of Child-Links--> <HR> <!--Navigation Panel--> <A NAME="tex2html771" HREF="node28.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html765" HREF="node20.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html759" HREF="node26.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html767" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <A NAME="tex2html769" HREF="node63.html"> <IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="index.png"></A> <BR> <B> Next:</B> <A NAME="tex2html772" HREF="node28.html">1.4.4.1 Exercises</A> <B> Up:</B> <A NAME="tex2html766" HREF="node20.html">1.4 Laboratory Exercises</A> <B> Previous:</B> <A NAME="tex2html760" HREF="node26.html">1.4.3.1 Exercises</A> <B> <A NAME="tex2html768" HREF="node1.html">Contents</A></B> <B> <A NAME="tex2html770" HREF="node63.html">Index</A></B> <!--End of Navigation Panel--> <ADDRESS> Paul Wessel 2010-01-14 </ADDRESS> </BODY> </HTML>
