Do you have an up-to-date list of all supported horizontal map datums ?
A regularly updated list of all supported horizontal map datums and their corresponding parameters can be found at the URL below.
When a map datum is not listed, you can add this map datum by yourself. Please notify our helpdesk, so we can include it in the next release of the software.
http://www.eye4software.com/hydromagic/documentation/supported-map-datums/