Hi Giò,
Out of all the treemap vendors I’ve researched a company called The Hive Group seems to have the best and most well thought out treemaps.
They also have a service (HiveOnDemand) that lets individuals create treemaps without any technical knowledge (like me) straight from Excel. I've been using HiveOnDemand for a while and would highly recommend it!
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frmsrcurl:
http://msgroups.net/microsoft.public...arting/Treemap