He invented the map key
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A map key
The map key, also known as the legend, has been used in maps for centuries. It is difficult to attribute its invention to a single person or culture as various civilizations throughout history have utilized keys to explain symbols and features on maps.
Another name for a map legend is key.
The key on a map explains what the symbols and images on the map mean.
on a map key key you can find and locate where or what something is.=]
The key of the map explains all the symbols used on the map.
the teacher asked us to draw up a key for our map.
harry beck invented the underground map
the map key is the box that tells you what the icons mean in a map
The key on a map explains what the symbols and images on the map mean.