“The wonders of the Grand Canyon cannot be adequately ... Washburn was convinced of the potential for “a map of really superlative beauty as well as topographic quality.” ...

And then, we have this entire legacy of building upon the sort of topographic base map with other kind of value-added bits of data. So geologic data and all the other types of data could be collected ...

check out the contours of the Grand Canyon or study the urbanization of the San Francisco Bay Area (see below). Hunting for historical topo maps on the USGS site used to be confusing and annoying.

Now you can get a taste of what it's like to experience the breathtaking wonder of the Grand Canyon, right from your computer chair. I'm PCMag's managing editor for consumer electronics ...