The larger issue is I can't imagine what you could possibly mean for map reading to be lost. 'map reading' to me is the cognitive ability to assign correspondences between a visual representation and an object, and to make deductions about the object from its representation. It encompasses reading scale drawings, or IKEA instructions, or navigating a web site, or working the menu on an ATM; It's a large portion of what an IQ test is going after; it's not in any danger as long as the Flynn effect doesn't backtrack by several hundred years.
Well, of course you might mean something way more banal, like the bag of tricks associated with the specific map-reading practice of correlating positions on a printed image to positions on the geoid. That's like long division: the people who have a need to deeply know how it works... will learn it just fine, because the ability to work through correspondences between representation and represented isn't going anywhere (and, I would argue, is only placed under more demand and thereby enhanced by technology like your android phone.)
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Well, of course you might mean something way more banal, like the bag of tricks associated with the specific map-reading practice of correlating positions on a printed image to positions on the geoid. That's like long division: the people who have a need to deeply know how it works... will learn it just fine, because the ability to work through correspondences between representation and represented isn't going anywhere (and, I would argue, is only placed under more demand and thereby enhanced by technology like your android phone.)