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Mapping with ArcGIS Pro by Ryan Malhoski, Amy Rock

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Scale of your data

It is important to understand the full spatial extent of your data. The size, shape, and location of your data plus the purpose of your map, will drive what projection to use. Here are some questions you should ask before choosing a projection:

  • What area does the data cover?
  • What is the shape of the data?
  • What aspect do I want to preserve?

You want to first understand where your data will lay on your map. This will help you narrow down which projections to use, like choosing a planet, continent, country, or smaller projection. Also, you must be mindful of what shape the data is. The common projections you have learned about so far are planar, cylindrical, and conic. Respectively, these are round, rectangular, and triangular ...

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