You can automate the web interface in Google the Google Maps "My Maps", but there is an easier way to get to the raw KML that you might not have known about.
For the current owner of the map within the Google My Maps, use a web browser to choose "Export to KML" and choose "Entire Map" in the dropdown, and choose the checkbox for "Keep data up to date with network link KML (only usable online)". That export will give you a KMZ file. Use an unzip program (7zip, unzip, Winzip, anything that understands zip format) to see the contents. Within the zip file will be a doc.kml file. Examine the contents of the doc.kml in a text editor. There is a <link> element which has within it a <href> element. That is the URL you can use with wget/curl/LWP to to your backup file retrieval.
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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