<!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>K.4.2 The low resolution (-Dl)</TITLE> <META NAME="description" CONTENT="K.4.2 The low resolution (-Dl)"> <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="node224.html"> <LINK REL="previous" HREF="node222.html"> <LINK REL="up" HREF="node221.html"> <LINK REL="next" HREF="node224.html"> </HEAD> <BODY bgcolor="#ffffff"> <!--Navigation Panel--> <A NAME="tex2html5834" HREF="node224.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html5828" HREF="node221.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html5822" HREF="node222.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html5830" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <A NAME="tex2html5832" HREF="node256.html"> <IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="index.png"></A> <BR> <B> Next:</B> <A NAME="tex2html5835" HREF="node224.html">K.4.3 The intermediate resolution</A> <B> Up:</B> <A NAME="tex2html5829" HREF="node221.html">K.4 The Five Resolutions</A> <B> Previous:</B> <A NAME="tex2html5823" HREF="node222.html">K.4.1 The crude resolution</A> <B> <A NAME="tex2html5831" HREF="node1.html">Contents</A></B> <B> <A NAME="tex2html5833" HREF="node256.html">Index</A></B> <BR> <BR> <!--End of Navigation Panel--> <H2><A NAME="SECTION002842000000000000000"></A> <A NAME="32281"></A> <BR> K.4.2 The low resolution (<B>-Dl</B>) </H2> <P> We have now reduced the map area by zooming in on the map center. Now, the edges of the map are all 2000 km true distance from the projection center. At this scale we choose the low resolution data that faithfully reproduce the dominant geographic features in the region. We cut back on minor features less than 100 km<IMG WIDTH="11" HEIGHT="18" ALIGN="BOTTOM" BORDER="0" SRC="img281.png" ALT="$^2$"> in area. We still add national borders to the plot. The low database is less decimated and simplified by the DP-routine: The total file size of the coastlines, rivers, and borders combined grows to 907 kbytes; it is the default resolution in <A NAME="tex2html1848" HREF="http://gmt.soest.hawaii.edu"><B>GMT</B></A>. The plot is generated by the script: <P> <BR CLEAR="ALL"> <HR> <BR> <PRE>pscoast `./getbox.sh -JE130.35/-0.2/3.5i 2000` -J -P -Dl -A100 \ -Glightgray -Wthinnest -N1/thinnest,- -B10g5WSne -K > GMT_App_K_2.ps ./getrect.sh 500 | psxy -R -J -O -Wthicker -L -A >> GMT_App_K_2.ps </PRE> <BR CLEAR="ALL"> <HR> <P> <DIV ALIGN="CENTER"><A NAME="fig:GMT_App_K_2"></A><A NAME="32392"></A> <TABLE> <CAPTION ALIGN="BOTTOM"><STRONG>Figure K.2:</STRONG> Map using the low resolution coastline data.</CAPTION> <TR><TD> <DIV ALIGN="CENTER"><IMG WIDTH="460" HEIGHT="460" ALIGN="BOTTOM" BORDER="0" SRC="img283.png" ALT="\includegraphics{scripts/GMT_App_K_2}"></DIV></TD></TR> </TABLE> </DIV> <P> <A NAME="32285"></A> <P> <HR> <!--Navigation Panel--> <A NAME="tex2html5834" HREF="node224.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html5828" HREF="node221.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html5822" HREF="node222.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html5830" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <A NAME="tex2html5832" HREF="node256.html"> <IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="index.png"></A> <BR> <B> Next:</B> <A NAME="tex2html5835" HREF="node224.html">K.4.3 The intermediate resolution</A> <B> Up:</B> <A NAME="tex2html5829" HREF="node221.html">K.4 The Five Resolutions</A> <B> Previous:</B> <A NAME="tex2html5823" HREF="node222.html">K.4.1 The crude resolution</A> <B> <A NAME="tex2html5831" HREF="node1.html">Contents</A></B> <B> <A NAME="tex2html5833" HREF="node256.html">Index</A></B> <!--End of Navigation Panel--> <ADDRESS> Paul Wessel 2010-07-14 </ADDRESS> </BODY> </HTML>