There's an unofficial, extended version of the measure tool that supports the JSONify and reloading of measurement data: https://github.com/wallabyway...
let measurementData = measureTool.getJson();
...
measureTool.loadJson(measurementData);
Official support for this feature is still being reviewed and will be announced in due course. Note: Although not entirely third party (built by ADN team), this extension is still unofficial and hence not officially supported by Autodesk, and is subject to change and might become incompatible with later versions of Viewer w/o prior notice.
There's an unofficial, extended version of the measure tool that supports the JSONify and reloading of measurement data: https://github.com/wallabyway...
Official support for this feature is still being reviewed and will be announced in due course.
Note: Although not entirely third party (built by ADN team), this extension is still unofficial and hence not officially supported by Autodesk, and is subject to change and might become incompatible with later versions of Viewer w/o prior notice.