I found to use the above URLs in a KML <href> one needs e.g., <href>http://www.google.com/chart?chst=d_map_pin_letter&chld= %E7%94%B2%7CFF0000%7C000000</href> i.e.,via perl's URI::Escape: 'http://www.google.com/chart? chst=d_map_pin_letter&chld='.uri_escape_utf8('甲|FF0000|000000' which pass the validator and appears to work from KML via http://maps.google.com/maps?q=http...kml
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