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Oh hello everybody and welcome to today's session of learn extra exam revision today's topic is maps and GIS and geography before we get into our maps and GIS, and before we actually take a look at a past paper to give you an idea of how your examiner might ask some questions about it, we need to have an understanding of our revision and to know what it is that is a GIS and how we can use it in the real world let's take a look at our checklist make sure that you know how to first describe what a GIS is now a GIS stands for geographic information system essentially we're talking about an interaction between humans computers databases satellites and anything else that can give us information about maps in a real-time experience that is at the flick of a button from your cell phone to your computer we'll take a look at how this all fits together in a diagram just now you also need to be able to explain the different types of data involved now data very simply is information in your computer that can be used by a human to make decisions and that data goes from everything to the structure of the earth all the way through to bits and pieces and buildings and roads and railways and things on the earth all put together in addition we need to understand how the GIS and its information inside can be used to solve problems because essentially what this is what this G is it's a decision-making tool it's a tool used by humans to be able to make our lives easier let's take a look at the structure of the GIS, and you'll see how it feeds into helping us up in making those decisions we've got our little friend here who's wanting to make decisions about GIS things like what's the quickest route to the shops what's the best route for me to travel on in order to get to my holiday destination which hotels are overlooking the beachfront these are all questions that can be answered by a GIS it's simply about asking the right questions, so our little person is going to interact with a number of different devices this can be anything from a cell phone the little GPS unit in the motorcar and even of course your desktop PC or tablet any one of these devices can be used by a person to access primarily the Internet in order to get a hold of the information that we need to make those decisions count so from here these devices are going to connect up to a database now a database very simply is a place where we can store information and the storing of that information comes from a variety of different devices from satellites which take photographs of the earth from space from GPS units so a person running around in the streets with a GPS unit punching in coordinates to say that this is where they're standing aerial photography photos taken from airplanes in order to see what the world is like to be able to place those elements in context in positions and of course all of this will be put together with our coordinates of latitude and longitude now all of that together winds up...
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