How do you find the limits of areas on a chart?

In article ,
Mxsmanic wrote:

I see tons of restricted areas, MOAs, Class B, C, D, E airspace, and
the like on charts, but no clear indication of how to locate the
boundaries of these areas other than by pure guesstimate based on
looking at the chart.

Do you mean how do you find the boundary as depicted on the chart, or
how do you relate the depicted boundary to an actual physical location
out in the real world?

If the former, there's a legend printed on every chart.

If the latter, when all else fails, some pilots fall back on an advanced
technique that is all but forgotten in this age of GPS. It's called
"looking out the window for landmarks."

rg