def read(self, service_url, timeout=<NUM_LIT:30>):
request = self.descCov_url(service_url)<EOL>u = openURL(request, cookies=self.cookies, timeout=timeout)<EOL>return etree.fromstring(u.read())<EOL>
Get and parse a Describe Coverage document, returning an
        elementtree tree

        @type service_url: string
        @param service_url: The base url, to which is appended the service,
        version, and request parameters
        @rtype: elementtree tree
        @return: An elementtree tree representation of the capabilities document