Question

We are developing a web GIS based on iPortal, where public users will be able to access the platform while also having the ability to view their own data. In iPortal, public users are required to register (with a role already configured to allow data upload and visualization without saving) in order to follow this workflow. However, this approach has the drawback that users must create an account before accessing data visualization and related features.

The question is whether the login/registration mechanism can be customized so that public users can directly visualize their data (without registration) within the platform.

Answer 1

You can achieve data visualization by extention development - homepage customization. The userDefaultHeader default value is true, you can set it as false and then customize the header. Please refer to the help document to see the details. 
https://help.supermap.com/iPortal/en/iP/iPortal_DevelopGuide/Custom_iPortal/Homepage_Custom/home_custom.htm

But data uploading is not supported without registration and we don't think it's a drawback, on the one hand, there are storagy limitations in iPortal. And on the other hand, users can't save their results. With registration, administrator can better manage users and allocate resources. So we don't recommend you open it.

Hopefully the above information is helpful.