Dear all,
At WHO we are using a application called Bulk Load to upload data from excel which could help you guys.
The application generates templates automatically from any data set or even program. During data upload it identifies duplicates (e.g. duplicated events). You can configure a time range within which events can be considered duplicates.
We haven’t experience any issues so far with the data visualizations.
The latest version of this app was just released: Bulk Load app 3.5.1 now available
GitRepo:
Hope this helps!
Lucia