<!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>O.3.1 Equidistant labels</TITLE> <META NAME="description" CONTENT="O.3.1 Equidistant labels"> <META NAME="keywords" CONTENT="GMT_Docs"> <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_Docs.css"> <LINK REL="next" HREF="node244.html"> <LINK REL="previous" HREF="node242.html"> <LINK REL="up" HREF="node242.html"> <LINK REL="next" HREF="node244.html"> </HEAD> <BODY bgcolor="#ffffff"> <!--Navigation Panel--> <A NAME="tex2html6135" HREF="node244.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html6129" HREF="node242.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html6123" HREF="node242.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html6131" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <A NAME="tex2html6133" HREF="node256.html"> <IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="index.png"></A> <BR> <B> Next:</B> <A NAME="tex2html6136" HREF="node244.html">O.3.2 Fixed number of</A> <B> Up:</B> <A NAME="tex2html6130" HREF="node242.html">O.3 Examples of Contour</A> <B> Previous:</B> <A NAME="tex2html6124" HREF="node242.html">O.3 Examples of Contour</A> <B> <A NAME="tex2html6132" HREF="node1.html">Contents</A></B> <B> <A NAME="tex2html6134" HREF="node256.html">Index</A></B> <BR> <BR> <!--End of Navigation Panel--> <H2><A NAME="SECTION003231000000000000000"> O.3.1 Equidistant labels</A> </H2> <P> Our first example uses the default placement algorithm. Because of the size of the map we request contour labels every 1.5 inches along the lines: <P> <BR CLEAR="ALL"> <HR> <BR> <PRE>pscoast -R50/160/-15/15 -JM5.3i -Glightgray -A500 -K -P > GMT_App_O_1.ps grdcontour geoid.nc -J -O -B20f10WSne -C10 -A20+s8 -Gd1.5i -S10 -T:LH >> GMT_App_O_1.ps </PRE> <BR CLEAR="ALL"> <HR> <P> As seen in Figure <A HREF="#fig:GMT_App_O_1">O.1</A>, the contours are placed rather arbitrary. The string of contours for <IMG WIDTH="32" HEIGHT="29" ALIGN="MIDDLE" BORDER="0" SRC="img295.png" ALT="$-40$"> to <IMG WIDTH="20" HEIGHT="29" ALIGN="MIDDLE" BORDER="0" SRC="img296.png" ALT="$60$"> align well but that is a fortuitous consequence of reaching the 1.5 inch distance from the start at the bottom of the map. <P> <DIV ALIGN="CENTER"><A NAME="fig:GMT_App_O_1"></A><A NAME="33500"></A> <TABLE> <CAPTION ALIGN="BOTTOM"><STRONG>Figure:</STRONG> Equidistant contour label placement with <B>-Gd</B>, the only algorithm available in previous <A NAME="tex2html1940" HREF="http://gmt.soest.hawaii.edu"><B>GMT</B></A> versions.</CAPTION> <TR><TD> <DIV ALIGN="CENTER"><IMG WIDTH="653" HEIGHT="195" ALIGN="BOTTOM" BORDER="0" SRC="img297.png" ALT="\includegraphics{scripts/GMT_App_O_1}"></DIV></TD></TR> </TABLE> </DIV> <P> <HR> <!--Navigation Panel--> <A NAME="tex2html6135" HREF="node244.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html6129" HREF="node242.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html6123" HREF="node242.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html6131" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <A NAME="tex2html6133" HREF="node256.html"> <IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="index.png"></A> <BR> <B> Next:</B> <A NAME="tex2html6136" HREF="node244.html">O.3.2 Fixed number of</A> <B> Up:</B> <A NAME="tex2html6130" HREF="node242.html">O.3 Examples of Contour</A> <B> Previous:</B> <A NAME="tex2html6124" HREF="node242.html">O.3 Examples of Contour</A> <B> <A NAME="tex2html6132" HREF="node1.html">Contents</A></B> <B> <A NAME="tex2html6134" HREF="node256.html">Index</A></B> <!--End of Navigation Panel--> <ADDRESS> Paul Wessel 2010-07-14 </ADDRESS> </BODY> </HTML>