If I recall, the Devs specifically chose NOT to use the map to pick artillery points as it would results in commander's instantly calling artillery to the well known choke points on the map.
Indeed -- plus, during WWII and even Vietnam, most forward artillery observers had to get "eyes on" then cross ref with their maps before calling in a fire mission. Generally, that's still true today -- I guess you could argue that the recon plane is serving that "eyes on" purpose...but that's kinda cheating because it's automatic and error-free (based off line of sight).
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