The technology that is used to make maps has made map making much easier. Early maps had to be hand drawn making them hard to reproduce so the only people with maps were those with the money to pay people to draw them or the need for maps to navigate by. The invention of the printing press made the reproduction of maps possible so they became more available to the general public. Maps may have been reproducable but they're accuracy still depended on the people making the observations and measurements. With space technologies taking off, sattilites were able to take detailed photographs of large area of the planet that could be used for map making but a reference system was still needed. The launch of a constilation of satilites enabled a grid to be placed over the Earth that satilites could use to return a set of possition coordinates in a number of refrence systems like UTM to a user on Earth via a GPS unit.
Making a map of technology could be just about anything since most things in life today show some level of technology. This is a map showing wireless network coverages for example
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