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<body class='hmmessage'><div dir='ltr'>Hi,<br><br>I'm very interested in the OHM project and I would like to contribute data for Mainz, Germany. In the long run I would like to create a map of the city before the destructions during WW2, but also of earlier periods. I have had a look at the OHM Sandbox, but I couldn't find out where the time dimension comes in. How do you tag and display temporal information? The map would have to change with time settings - eventually? I'd really appreciate if anyone could give me a short insight into the current state of the project.<br><br>Best regards<br><br>Marcus König<br><br> </div></body>
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