The Great Lakes, formed by melting glaciers 10,000 years ago, were ready last week for their close-up. Detroit Public Television, seizing an opportunity that comes about as often as a planetary alignment, televised 25 hours of speeches, conferences, workshops and meetings about the future of the massive lakes that nearly surround Michigan. Great Lakes Now, a three-day event organized by a regional group and two government agencies, was documented by DPTV’s live streaming and on-demand video of speakers, nightly half-hour wrap-up broadcasts and satellite feeds that extended the speakers’ reach south to Houston, east to New York and west to Phoenix. DPTV clearly demonstrated how a midsized public television operation could give people unprecedented access to those who make policy on local and regional issues. “Look at the role we can play in our community and communities throughout the country,” said Rich Homberg, DPTV president.