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Grammar Essentials(ISBN - 047061837X)

While digital maps are made up of bits and bytes,
they share a number of things in common with
their paper and ink cousins — like datums, coordinates
systems, scales, legends, and compass roses. In fact if you
get some of these concepts down, which hopefully you
will after reading this part, you’ll be at home with just
about any map you encounter, whether it’s displayed on
your PC’s monitor or laying on the front seat of your car.
Paper maps have a certain old school charm, but digital
maps are infinitely cooler. That’s because you can associ-ate data with a digital map and make it interactive and
smart. This part sets the stage for other chapters in the
book. We’re going to be talking about all sorts of PC, Web-based, and GPS maps, and it’s important that you under-stand the basics of how digital maps work and what types
of digital maps are out there; especially the free ones
available on the Internet.

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Grammar Essentials(ISBN - 047061837X)