It seems that,there is no maptype related.<br><br><div class="gmail_quote">2011/12/15 Andreas Hocevar <span dir="ltr">&lt;<a href="mailto:ahocevar@opengeo.org">ahocevar@opengeo.org</a>&gt;</span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

Maybe you find UML diagrams helpful: <a href="http://trac.osgeo.org/openlayers/wiki/UML" target="_blank">http://trac.osgeo.org/openlayers/wiki/UML</a><br>
<br>
Andreas.<br>
<div><div class="h5"><br>
On Thu, Dec 15, 2011 at 12:34 PM, maven apache &lt;<a href="mailto:apachemaven0@gmail.com">apachemaven0@gmail.com</a>&gt; wrote:<br>
&gt; Hi:<br>
&gt;<br>
&gt; I want to know if there is any document about the concepts and relationship<br>
&gt; between the map/maptype/layers/overlay ?<br>
&gt;<br>
&gt; I thinks sometime it is necessary if we want to do some customzation.<br>
&gt;<br>
&gt; I have read the doc from <a href="http://ol.org" target="_blank">ol.org</a>,but the api document is simple.<br>
&gt;<br>
&gt; Any complete documents?<br>
&gt;<br>
&gt; Thanks.<br>
&gt;<br>
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&gt;<br>
<span class="HOEnZb"><font color="#888888"><br>
<br>
<br>
--<br>
Andreas Hocevar<br>
OpenGeo - <a href="http://opengeo.org/" target="_blank">http://opengeo.org/</a><br>
Expert service straight from the developers.<br>
</font></span></blockquote></div><br>