I wanted to add a little more info to this that I can post without violating our NDA. Basically the radar plugin can be substituted for our SVG mapspot plugin. The radar source code is available at the very bottom of this page...
https://krpano.com/plugins/radar
In the tour.xml file in the appropriate place...
<hotspot name="spot1b" style="hotspot_radar" ath="90" atv="-10" linkedscene="xxx" linkedscene_lookat="0,0"/>>
In the skin.xml file...
<style name="hotspot_radar" scale="1.0" align="center" x="0" y="0" keep="true" url.html5="%SWFPATH%/plugins/radar_source.js" zorder="1" fillalpha="0.15" fillcolor="0xFFFFFF" linewidth="0.75" linecolor="0xFFFFFF" linealpha="0.5"/>
Ok, the graphics don't show up but what is interesting is that the viewer knows there is "something" there and will switch the cursor out to the hand icon per the radar code in the appropriate polar location per the ath and atv values. I really feel like there is probably a solution here since I can't imagine there is anything unique about the radar plugin overlaying the SVG graphics over a flat PNG image in the plan/map area vs in polar coordinates over the pano image. I just don't have deep enough experience to see an easy solution here but perhaps this can point some of the smarter people towards a solution?