How Does GIS Works

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CREATING GIS
  1.  Essentially, geographic information states what is where.
  2. So to create geographic information, we have to record these two elements somehow.
  3. They can be captured through many different types of observations, measurements and surveys.
  4. Data can be sourced from aerial photography, satellite images, field samples, land surveying, population censuses, global positioning systems (GPS) and government administrative records among others.
How To Combine Geographic Information..?

  • If we are combining a number of different geographic information themes together, they may be from different sources, in different formats and covering different study areas.Therefore, we need to use a system to deal with the disparate sources and organize them so that they can be combined.
  • A Geographic Information System does just that It is a tool for the input of different geographical information themes so that they can be stored, organized, displayed and analyzed.
  • It uses geography as the common denominator between separate themes so that they can be combined.
  • Its purpose is to provide answers to questions based on geographical data.
 Click the following link to avail PDF file creating GIS

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The Vance Model of Transport Development

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