Explain why coordinate reference systems must be checked before distance, area, and overlay analysis.
CRS is part of the method. A CRS controls the meaning of every coordinate. If the CRS is geographic, the coordinates are angles. If it is projected, the coordinates usually use linear units across a designed surface. That is why the same geometry can display fine but measure badly. Store vs analyze Storage CRS is about interoperability. Analysis CRS is about the calculation you are about to make. Do not assume one CRS can safely do both jobs. Match the projection to the metric Use local projected systems for local distance and area, equal-area projections for areal rates, and accepted…
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