how effective is tree mapping? are treemaps useful at conveying information? what type of diagram is treemapping are treemaps effective do treemaps convey information why do tree maps fail why is treemap diagram difficult? why treemaps are not effective why is tree mapping useful? is tree mapping effective for visual are treemaps effective why are treemaps useful what is tree mapping what is the treemap used for? what is treemaps? why are treemaps effective for conveying information? are tree maps effective is treemapping effective which is an effective way of conveying information? why is tree mapping useful