About a year ago we performed a poc on Cesium-ion-SDK-1.75 .

After examining this version, it turned out that we were missing some features in the field of measurements, viewshed and analysis.

After a conversation with Roberto we got a dedicated (special) version, with these features

named: “Cesium-ion-SDK-1.75-Viewshed”.

This version was to our satisfaction and it was agreed that these features would go into the next version of Cesium-ion SDK.

Now, we want to upgrade to the Cesium-ion-SDK-1.89 version

and it turned out that these features are missing or partially realized in the version.

Bottom line is that the features do not work.

I would love for your reference,