A common useful display technique for digital terrain topographic maps is to have a shaded relief layer than can be overlaid as a layer on a altitude contour map to more easily visualize the peaks and valleys.
It seems to me that the same thing could be done for upper air constant-pressure-height or surface pressure charts to easily see the highs and lows and relative iso-height/pressure contour levels. This doesn't seem to be done within the meteorology community, but I wonder why not? A "ridge" or a "trough" would take on intuitive visual meaning in such a depiction, as would the relative depths of cutoff lows, etc., aiding in insight into the general weather pattern. Maybe it's already done somewhere? Any insight would be appreciated.
Example (courtesy of Caltopo):